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Philippine Resources - April 04, 2019
Reducing pump bearing failures with lubricators
When pumping slurry, gland seals can be prone to leakage. This is often caused by inadequate maintenance, incorrect lubrication application, poor quality gland water, or a combination of all three. Plant operators should be vigilant against gland seal leakage as it can cause premature bearing assembly failures, leading to downtime. Gland Maintenance Inadequate gland maintenance can cause leakage, spraying slurry or water directly onto the pump’s bearing assembly. If this penetrates the bearings, there is a high risk of failure.In some instances, incorrect gland seal adjustment causes unwanted leakage. This can be resolved by regularly adjusting the seal and ensuring seal water supply is high quality and free of abrasive particles. Bearing assembly lubrication In addition to contamination ingress from leaking gland seals, Incorrect bearing assemblylubrication volume is another factor to be mindful of. If a pump bearing assembly is over greased, a build-up of excess grease in the bearing assembly cavity can cause grease churning resulting in elevated bearing temperatures. This leads to rapid degradation of grease and subsequent bearing failure. Conversely, if the bearing assembly is under greased, the loss of fluid film lubrication will cause premature bearing wear. When this occurs, the remaining grease will experience accelerated degradation due to internal contamination caused by abrasive wear particles.To help prevent premature bearing assembly failures, Weir Minerals recommends that grease should be regularly supplied to the bearing assembly labyrinth seals using Warman® Accumin® automatic lubricators. This provides a protective barrier against gland leakage and other sources of external contamination whilst also regreasing the bearings.Michael Roinich, Weir Minerals Accumin® Product Specialist states “Our Warman Accumin automatic lubricators are a heavy-duty, single point lubrication system designed specifically for Warman slurry pumps. They deliver the required amount of grease in line with our specifications and are fitted as standard on any new pumps. This helps our customers prevent bearing failures, keeping their operations running smoothly.” The Accumin range is comprised of two lubricators with easy to adjust dispensing systems. The Accumin® 125 lubricator, ideal for smaller pumps, is waterproof, gas operated and ready to use straight out of the box. The 250 model embraces the latest technology and is recommended for larger pumps, featuring a reusable electro-mechanical drive unit embedded with software which can determine fault codes. This model features an LCD display and LED indicators which immediately confirm the lubrication system’s operational status. Accumin® lubricators are suitable for most grease lubricated rotating equipment including conveyors, fans, electric motors, valves, filter belts, vacuum pumps, mechanical seals and gearbox seals.Accumin lubricators maintain a grease barrier within the labyrinth seal. This prevents external contamination ingress into the bearings from gland water or slurry. Using Accumin® lubricators decreases the risk of lubrication related failures and extends the life of the pump. Accumin® lubricators deliver small amounts of grease at regular intervals for a seal purging effect. This allows any contaminated grease to be pushed out before it can further penetrate the bearing assembly. This is preferable to using a manual grease gun to insert a large amount of grease at once, which can result in over greasing and elevated bearing temperatures. The grease dispensing rate, in monthly increments, ranges from one to twelve months, allowing equipment to be lubricated as needed. Furthermore, when compared to multipoint systems, single-point lubricators require less maintenance and are more economical while providing the same benefits. “Our Accumin lubricators are part of our holistic approach to supporting customers, with the product designed to reduce bearing assembly failure for lower total ownership costs. “We are the only manufacturer to provide a heavy-duty lubrication as standard on our pumps, helping our customers get the most out of their equipment,” states Michael Roinich, Weir Minerals Accumin Product Specialist. Adopting a proactive approach to pump maintenance and lubrication will help improve equipment reliability and its lifespan, whilst reducing maintenance costs and downtime. Contact your local Weir Minerals representative today for more information. All the conveyors are hydraulically fold-able.
Philippine Resources - March 29, 2019
CTPCMC Awarded as Regional Fire Olympics and Mine Safety Fire Brigade Competition Champions
By: Marcelle Villegas CTP Construction and Mining Corporation is one of the top 5 nickel mines in the Philippines. They operate the Adlay Mining Project and Dahican Nickel Project in Surigao Del Sur. Having a triple ISO certification is just one of the many notable accomplishments of the company. Last year, they were the champion for the 5th Regional Fire Olympics 2018, Industrial Fire Brigade Category in the Caraga Region. The competition was held last June 1, 2018 at Tandag City, Surigao del Sur. Here is an exclusive feature of Philippine Resources Journal as we interviewed Mr Simplicio E. Oliveros III, the Head of Safety and Health Department of CTPCMC. Fire safety is sometimes trivialized or misunderstood as something that can be accomplished by anyone. However, being a part of a Fire Brigade is not as simple as it sounds. It requires special training and establishing a team of highly competent individuals who are focused, smart and resilient even under pressure. These requirements are essential because the team will be dealing with life threatening situations. Moreover, being a part of the Fire Brigade and Emergency Response Team requires skill, discipline, physical stamina, focus and the ability to analyse and respond to emergency situations quickly and correctly. For those unfamiliar with a Fire Olympics, this is a competition where each team is subjected to fire emergencies and rescue scenarios. “There is a target where we need to hit with water after replacement of busted hose,” according to Mr Oliveros. This trial involves the use of a 6-feet ladder on 12 ranks. On a typical Fire Olympics, there are trials like Pump and Roll with Turret Target, Raising Ladder, Blitz Attack, and more. “The competition determines the fastest and the most accurate team in extinguishing fire,” he adds. For the Rescue and Transfer Relay Operation, members are to execute the different techniques in carrying a victim. CTPCMC’s Safety and Health Department’s work is not only limited within the mine site. They also extend their assistance to outside communities where help might be needed. “In terms of emergency response, we recently responded to a road traffic accident between a motorcycle and a bicycle,” Mr Oliveros said. “We were also the first to respond to Typhoon Basiang [in February 2018]. We support the LGU during calamities. We also conducted a First Aid Training and Mine Rescue [training]. This year, we participated in the Regional Fire Olympic. As a matter of fact, we won!” The Safety and Health Department office has a fascinating array of trophies which reflect his team’s competence and commitment to their work. Their awards include the following: • Champion – Regional Fire Olympics, 2018 (Industrial Fire Brigade Category) • Champion – Regional Fire Olympics, 2017 (Industrial Fire Brigade Category) • Champion – 4th Mine Safety Competition, Mining Summit 2017 • Second Runner Up – Fire Brigade Competition, PMSEA 2017 In the future, they aim to compete in the National Fire Olympic event. He mentioned, “CTP will represent the Caraga region for the National Fire Olympics [in 2019]. Then we also aim to compete in PMSEA for First Aid and the Fire Brigade Competition.” In general, how does the department adhere to its commitment to excellence? Mr Oliveros states that as an ISO-certified company, they continue improving by monitoring tasks and performance, submission of reports for assessment, and regular meetings. In terms of safety in the mine site, they implement various safety measures to assure the prevention of accidents. For example, employees are required to wear safety vests, safety shoes, hard hat, etc. Within the office, they have regular monitoring of operations, a monthly Central Assessment Committee Meeting and Contractors Meeting. They also have a weekly Toolbox Meeting for their drivers and operators. “We are proud to say that we have never had any fatal accidents since 2016,” said Mr Oliveros. CTPCMC is 100% Filipino owned and has been operating since 2007. Aside from being one of the top 5 nickel mines in the Philippines, they are also the second nickel mine in the Philippines that was awarded three ISO certifications. They passed the ISO 9001, ISO 14001, and OHSAS certifications last 2016 and in February 2018. It was upgraded to latest versions, namely ISO 9001:2015 (Quality Management System) and ISO 14001:2015 (Environmental Management System) along with its existing OHSAS 18001:2007, certified by TÜV Rheinland.
Philippine Resources - March 19, 2019
PHILCONSTRUCT Marks its 29th Year
By Marcelle P. VillegasThe longest-running construction expo in Southeast Asia and the biggest trade show in the Philippines took place last November 8-11 in two venues, namely; SMX Convention Center and the World Trade Center Metro Manila. Now on its 29th year, this trade show for the construction industry welcomed more than 70,000 visitors. This massive expo is organised by the Philippine Construction Association Inc. (PCA). Members of PCA are responsible for more than 80% of the country’s total annual construction projects.Mr Morris Agoncillo, President of PCA states, “These are very exciting times for the industry with the government’s aggressive pursuit of infrastructure development through the Build, Build, Build program as well as the private sector’s drive to produce globally competitive projects, there are plenty of opportunities for both local and international suppliers to grow their business here. Our goal in PCA is to provide a venue where they can easily explore these opportunities and for close to three decades now. PHILCONSTRUCT has been that platform.” Secretary Ramon Lopez of Department of Trade and Industry (DTI) led the opening rites for the event. During the 29th PHILCONSTRUCT, the entire parking lot of World Trade Center Metro Manila was converted into an indoor exhibition hall to give space to many new international exhibitors. This is approximately an additional 3,000 square meters of indoor space, according to Mr Gerardo Pancho who is the 1st Vice President of the Philippine Constructors Association and the Overall Chairman of last year’s PHILCONSTRUCT. Since 2013 when PHILCONSTRUCT started its expansion, the event has generated a steady growth and demand for exhibit space from local and international suppliers. In the latest expanded exhibit, PHILCONSTRUCT featured building materials, construction equipment, fixtures, finishing solutions, and other related construction services from 23 countries. Participating countries include China, the European Union, Germany, Italy, India, Japan, Jordan, Korea, Malaysia, Singapore, Spain, Taiwan, Vietnam, and the United States. Over 1,500 companies participated in the event. PHILCONSTRUCT 2018 was presented by Pacific Paint (BOYSEN) Philippines, Inc. with major sponsors Civic Merchandising, Inc., CW Home Depot, Hyundai Asia Resources Inc., and QSJ Motor Philippine. The show sponsors are Caltex/ Chevron Philippines, Co Ban Kiat Hardware, and Isuzu Philippines.Mr Pancho mentioned that the event is a great venue for stakeholders from both the government and the private sector. From here, we can determine how these products and technologies from other countries can help improve and strengthen the country’s various structures and infrastructures. He said, “We expect this synergy between these stakeholders to help bring the practice of construction here in the Philippines to the next level.”The event also presented various technical lectures for engineers and engineering students. For instance, at SMX Convention Center, Mr Jun Perez conducted a lecture on Basic HVAC Seminar during the HVAC/R Philippine Technoforum 2018. In his lecture, he shared much of his vast experience in smart techniques in building designs and air con installation from his previous projects in Guam for the U.S. Army and U.S. Navy. The seminar was sponsored by Concepcion Midea Inc. Two meeting rooms for the seminar were filled with attendees who are engineering students and engineers.Within the exhibit ground in SMX Convention Center, many companies offered free technical lectures by experts like Engr. Jhon Carlo Rojo, Technical Support Engineer of Daikin Airconditioning Philippines Inc. His lecture emphasized the importance of Indoor Air Quality (IAQ). He mentioned that we breathe 28,800 times a day and 90% of the time, most of us are indoors. With that, IAQ has an impact on our health, work performance and quality of living. For almost 90 years, Daikin of Japan has been the leader in air con and air filter technology.
Philippine Resources - March 12, 2019
CTPCMC creates bamboo plantation
By Marcelle P. VillegasThere are numerous entrepreneurs and environmentalists who have concluded from their research and studies that the bamboo is an excellent choice in a reforestation project. Last year, CTP Construction and Mining Corporation launched their Bamboo Plantation as part of their reforestation program.CTP Construction and Mining Corporation operates the Adlay Mining Project and Dahican Nickel Project in Surigao Del Sur. The company actively participates in the National Greening Program (NGP) of the Department of Environment and Natural Resources (DENR).From our previous articles about CTP Construction and Mining Corporation (PRJ Issues 2 and 3 – 2018), we had featured the company’s reforestation project and their notable implementation of environmental protection and rehabilitation in their mine site. The company launched Project Gaia in 2017 where their team is composed of women from Barangay Adlay who are assigned for the company’s reforestation activities (plant nursery operations, planting, landscaping and maintenance).The company has a variety of tree species in their reforestation program but why is the bamboo a special part of this endeavour? It is a grass, not a tree. Trees are traditionally planted to create or rehabilitate a forest, so why is a grass like bamboo an excellent choice in a reforestation planning, according to the bamboo experts? Mr Leo Dominguez, President of OLLI Consulting Group, Inc. and an advocate for bamboo planting states that there is an advantage in planting bamboos instead of trees. “I am a lawyer in the responsible mining industry. Since 2015, I have been advocating to the mining industry the planting of bamboo. Traditionally, the mining industry has planted trees in the rehabilitation of mine sites. By law, mining companies are required to spend 1.5% of their OPEX on SDMP or Social Development Management Programs. Trees are highly regulated. You cannot cut a tree without permits from the DENR." He further explains that, “Bamboo is a grass. Consequently, bamboo is not subjected to the same burdensome regulatory protocols as trees.”Additionally, the bamboo is very effective in cleaning the air compared with other plants or trees. According to the study of Mr Dominguez, bamboo works 400 times better than trees in terms of carbon sequestration. Mr Dominguez was a presenter at the Mining Philippines 2018 last September and in his report, he featured photos of CTPCMC as one of the mining companies who are currently advocates of planting bamboo for environmental and socio-economic reasons. Bamboos are also fast-growing, low-maintenance, resilient plants with high survival rate. Eventually when the bamboos grow in height, their upper stalks may be cut down, leaving the lower stalks on the grown for it to regrow again. The bamboo can be utilised for other purposes like as building materials for houses, furniture, bicycle framework, and more. It has a lifespan of 80 to 100 years. Therefore, they can provide livelihood to mining communities for decades. This is a remarkable benefit that not all plant or tree varieties may provide.In order to establish a mother source of bamboo for future bamboo production of the company, last September 2018, a total of 9 seedlings of bamboo planted at Area 1 (rehabilitated area) for initial stage. Species planted were Laak, Kajali and Guadua. These were planted by Mr Clarence “Carlo” J. Pimentel, Jr. (President and CEO of CTP Construction and Mining Corp. and co-founder of the Philippine Nickel Industry Association), Atty. Ross Romanillos and Engr. Charlo R. Basadre. Today, there are 580 bamboo seedlings produced from the nursery of the company with Laak species. From the startup nursery, CTPCMC Bamboo plantation was finally created in October 2017 where the planting on site started the following month. There were 301 bamboo seedlings planted in Dahican Nickel Project (DNP) and 300 for Adlay, therefore a total of 601 bamboo seedlings planted. They planted Giant Bamboo species at the 2B rehabilitated area of the mine site. Bamboo production and planting is a continuous activity as part of the company’s reforestation program.CTPCMC is 100% Filipino owned and has been operating since 2007. It is one of the top 5 nickel mines in the Philippines. It is also the second nickel mine in the Philippines that was awarded a triple ISO certifications namely, ISO 9001, ISO 14001, and OHSAS certifications last 2016 and in February 2018. It upgraded to latest versions namely ISO 9001:2015 (Quality Management System) and ISO 14001:2015 (Environmental Management System) along with its existing OHSAS 18001:2007, certified by TÜV Rheinland.
Philippine Resources - February 28, 2019
The Silver Coconut Carbon Versus Precipitation For High Silver Ores
Whenever flowsheets are considered for treatment of silver ores, the conventional approach is in favor of a Merrill-Crowe processing circuit rather than CIL/CIP. This is understandable when the historical development of CIP is considered. What has been disregarded is the fact that for the last 30 years there have been ClP plants successfully treating ore with high silver/gold ratios. The paper presented addresses the continuing debate on the use of carbon for silver recovery and seeks to explain the origin of the Silver Coconut 'myth'. Since many major gold projects contain large amounts of silver, this discussion is of particular interest to the region. During the 1970’s and 1980's significant advances in gold processing technology centered around CIP. Many of these developments occurred almost in isolation on three different continents. Cross-pollination of ideas was slow despite the excellent work done by international conferences. Prior to the commercial application of CIP both North America and South Africa had well proven Merrill-Crowe processes for most gold operations. CIP was initially developed in North America but further refined in South Africa where it became the major process for gold recovery.Its popularity quickly grew internationally, in particular for the treatment of low grade oxide deposits. The high clay content in many oxide ores proved a challenge for the liquid/solid separation step with Merrill Crowe. Although South Africa made major advances in CIP technology, there was no need to address the treatment of silver ores since South African ores do not contain any significant amount of silver. Australasia saw the development of several operations having high silver levels designed with CIP circuits. Several of these plants encountered processing problems due to the high silver content. In nearly all cases this was caused by an under-sized elution plant. The operations that were more successful such as the Martha Hill Project in New Zealand were those using the AARL elution system, which is more flexible than other elution systems owing to its ability to treat higher carbon flows. However, the publicity generated by the unsuccessful projects overshadowed the successful ones. The resultant confusion concerning CIP and silver has persisted to the present day. Flowsheet OptionsThe basic flowsheet choice is between zinc precipitation (Merrill-Crowe) (Figure 1) and carbon adsorption (CIP) (Figure 2). Various hybrid combinations of these two options are also considered as a compromise. A detailed description of the processes is not provided here as this is well described elsewhere. (Ref 1). The hybrid options are worthy of some discussion as they attempt to overcome some of the perceived problems with the two basic flowsheets when applied to high silver ores. The first hybrid option is to treat thickener overflow by Merrill-Crowe to reduce the grade of solution in the thickener underflow reporting to a subsequent CIP plant. It is believed that this proportionally reduces the carbon treatment rate. In fact, as the solution grade decreases, due to thickener feed dilution so does the carbon loading. Halving the solution grade does not halve the carbon treatment rate. Gold and Silver loading onto carbon is an equilibrium process, therefore, the lower the solution grade, the lower the carbon loading. The second hybrid option is the replacement of the electrowinning step by zinc precipitation. However, there are hidden cost implications in this route, which are not always considered. Treatment of high silver grade ores usually involves very large masses of recovered metal, up to several hundred times the weight of the gold recovered. In practice the electrowinning step becomes easier with high silver because a stainless steel wool cathode can be used. The deposited silver/gold slime is simply washed off the wool, filtered, dried and directly smelted with minimum flux usage. New cell designs also allow metal sludge removal without taking the cathode out of the electrowinning cell, thus reducing labour input. The final flowsheet selection is made through the economic comparison of capital and operating costs for the various options. The factors included in the assessment have previously depended very much on the degree of understanding of the metallurgical process. The following sections describe the testwork and modelling required to make a comprehensive assessment of the f!owsheet options. Testwork & ModellingA comprehensive computer model has been developed to study and optimise the CIP flowsheet. (Ref 2). The model includes the leach, adsorption and elution processes using data generated in specifically designed testwork. Leach and carbon design parameters are derived from the testwork which are fed directly into the process model. Capital and operating information is contained within the model which then allows a full optimisation study to be carried out for the cyanidation and metal recovery areas. Variables examined are Leach time (number and size of leach tanks); Adsorption stage (number and size of tanks); Degree of integration between CIP and CIL; Carbon concentrations and loadings and Elution plant size. The specific testwork techniques to derive the appropriate model parameters are now well established. The laboratory scale test equipment has proven scaleup factors which have been successfully demonstrated on numerous plants, with both high and low silver values. A bulk leach test is first undertaken to produce sufficient sample for the adsorption testwork. The leach curve derived from this test is described by an equation which demonstrates the fast and slow leaching and unleachable components of the ore. The adsorption testwork examines the carbon kinetics, equilibrium loadings and fouling factors for both gold and silver. The derived data is then used along with the leach parameters to optimise the circuit design. Gold and silver are examined independently. The silver flowsheet is first optimised as this tends to determine the size of the plant. The gold parameters are then checked to ensure acceptable performance. The Merrill-Crowe flowsheet is not modelled in the same ways since its' performance is fairly well fixed by a zinc consumption rate and metal recovery percentage. Testwork is carried out to confirm the precipitation parameters and to check for problem elements, such as copper. Process Selection The carbon option is often eliminated because of high capital and operating costs. Two major misconceptions have significant effects on the final costings and therefore the final flowsheet selection. These refer to carbon loadings and plant sizing. Carbon LoadingThe size of the elution plant is determined by the silver loading assumed for the loaded carbon. For conservative reasons, design silver loadings on carbon have traditionally been kept below 7500g/t, whereas in practice levels of two or three times that are achieved. If higher loadings are used for design, then the plant size can be proportionally reduced, thus reducing the plant and operating costs. Plant SizingThe capital and operating costs for the recovery plant are made up of a contribution from several areas: Acid wash, Elution, Electro-winning, Smelting and Regeneration. Traditionally it has been the practice to size each individual area to match the carbon elution rate. This, however, is not logical since different factors affect different areas, especially when related to high metal values. Acid Washing removes inorganic fouling of the carbon. The level of fouling decreases as the turnaround time increases at the higher carbon treatment rates. In many cases the inorganic fouling is minimal and the requirement for acid treatment of the carbon is reduced to as low as 20 per cent of the overall elution rate. Elution. The old debate of Zadra versus AARL is hopefully over. The use of Zadra systems was a significant contributor to the negative view of using carbon for silver recovery. The AARL elution process has the advantage of a short elution time (3 hours) compared with the 12-24 hours for Zadra. Clearly the AARL can easily accommodate much higher treatment rates with a smaller column compared to Zadra. Further advances, such as the split elution, have significantly reduced operating costs, thereby making the carbon route more competitive for silver recovery. Electrowinning. This has always been labour intensive and any increase in the size of the electrowinning plant was not favored, especially the size of plant required for high silver recovery. In practice, however, the high silver level actually becomes an advantage as it produces a non-coherent deposit that can simply be washed off the stainless-steel wool, filtered, dried and smelted. The usual problems of acid treating steel wool or calcining large quantities of iron are overcome.Modern electro-winning plant designs incorporate low cost, single pass, high efficiency cells with in-situ cleaning. The new designs are no longer labour intensive. Smelting. The use of stainless-steel cathodes to produce a silver/gold slime results in far less flux requirement and therefore reduced metal loss. The smelting furnace size is also reduced because of the smaller volumetric requirements. The bullion product gives a high quality silver/gold bar.Regeneration. It is generally assumed that carbon regeneration is a high capital and operating cost area of the carbon plant. Again, no cognisance has been taken of the process fundamentals of this step. Comparative cost estimates are frequently made on the basis of regeneration of 100 percent of eluted carbon. What is so often forgotten is that the organic fouling is more a function of ore treatment rate and not the contained metal values. Typically, a 1mtpa gold plant would treat 1000tpa of carbon. If silver were present, say at 50g/t (soluble), then the carbon treatment rate through elution would increase to say, 3000tpa ie three times.However, the carbon regeneration capacity could stay close to the original 1000tpa because this is tied to the ore treatment rate, not the silver levels, with some minor adjustment because of a slightly higher carbon inventory. Cost ConsiderationsThe economic model takes into account the various factors considered above to give more realistic values to the capital and operating costs for the carbon circuit. In a conventional gold plant, the process selected is usually CIP for reasons of lower capital and operating costs and reduced soluble losses. Additional advantages apply when treating ores with difficult liquid:solid separation steps. eg. Clays. When treating ores with high silver content a substantial increase in the size of the carbon plant is usually predicted by some designers. This results in a substantial increase in capital and operating costs which can reverse the economic advantages of the CIP flowsheet. Other concerns are the displacement of gold by silver on the carbon, causing soluble gold losses and poor silver adsorption kinetics. In well designed plants these factors are not material. Capital CostsFor a gold ore, the size of the carbon circuit increases more or less proportionally to the ore treatment rate, not the metal grade. A plant treating 1mtpa of ore would typically treat 1000tpa of carbon through the acid wash, elution and regeneration stages. The indicative capital cost relationship for varying plant sizes is shown graphically in Figure 3. The range of capital costs for a particular size are indicated to reflect differing project-specific detail requirements such as for various climatic conditions. The treatment of a high silver gold ore results in an increase in the size of the carbon circuit when compared to a 'gold' plant with the same ore treatment rate. This is due to the lower loading ratio of silver compared to gold.Using the above example of 1mtpa ore treatment rate the increase in carbon treatment rate with a 30glt soluble silver ore would typically be three times that of the gold ore i.e. 3000tpa. However, it is not the total recovery plant that increases in proportion, only the elution stage increases to this level. As previously noted, the acid wash and regeneration stages do not require to be matched to the elution rate. The capital cost therefore increases by only 60 per cent instead of doubling, as might perhaps be expected from simple application of the relative cost data given in Figure 3. Operating CostsThe differences which apply to operating costs are more significant than those for capital costs and benefit the CIP treatment route for high silver ore. Figure 4 and Figure 5 illustrate the operating cost distribution for the two cases of treating gold ore and high silver ore at the same ore treatment rate. These results translate to 60 per cent increase in the annual operating cost for the high silver ore recovery plant instead of a pro-rata 200 per cent increase. This obviously has a major influence on any cost comparison study. There are many other factors that need to be considered when undertaking a comparative study of two processes and this paper does not address what are often case-specific factors. The intention is simply to point out some additional major factors that should be addressed when designing plants for high silver ores. ConclusionsThe above assessment does not give a specific comparison of Merrill-Crowe versus CIP but instead indicates the fundamental considerations when assessing the applicability of a carbon system for the treatment of high silver ores. Testwork must be specifically designed to measure the carbon parameters for silver. Each process area for the carbon plant should be assessed separately and not simply matched to the elution rate. The latest process system should be included, such as the AARL elution system and in·situ cleaning, high efficiency electrowinning cells. There is no limiting silver/gold ratio that naturally precludes the use of carbon, and many more high silver ore projects would select the carbon route if the methods described above are given due consideration in the technical and economic evaluations. By carrying out appropriate testwork and using a proven modelling technique it can be demonstrated that CIP is more often a preferable option for high silver ores than Merrill-Crowe. GreenGold have recently been involved in the conversion of a hybrid Merrill-Crowe plant to a full CIL circuit simply with the addition of electro-winning capacity. Silver grades for this plant range up to 150g/t. References1. S.A.I.M.M. monograph series M.T. The Extractive Metallurgy of Gold in South Africa. Editor G.G. Stanley: 1987.2. Menne D.M., Predicting and assessing Carbon-in-Pulp circuit performance: XIV International Mineral Processing Conference, 1982.
Philippine Resources - February 28, 2019
Hino Total Support emphasizes efficient, eco-friendly vehicles, reliable service
Hino Motors Philippines (HMP), exclusive distributor of Hino trucks and buses in the Philippines, shores up its Total Support initiative further, launching heavy-duty trucks and modern jeepneys that are also environment-friendly, expanding its range of vehicles, and training manpower and dealers, all to meet the logistics and transportation requirements of the market.Seeing the growing demand in the country’s trucking industry as a result of the increasing number of development and infrastructure projects, Hino is investing in Euro 4 heavy-duty trucks. Its new jeepneys, meanwhile, address the need for a modernized and more comfortable transport system aligned with government goals. The company supports the call to care for the environment and is, thus, using Euro 4 engines.“Hino’s Total Support aims to maximize operation and minimize lifetime cost for our business partners. We strongly believe that by providing good products and total support we are able to support our customers’ business and contribute to society and grow with them at the same time,” shared Hino Motors, Ltd. Chairman Yasuhiko Ichihashi.Addressing growing logistics requirementsHino’s 700 series of heavy-duty trucks is designed to meet the diverse needs of the country’s thriving logistics industry. With these trucks, the company hopes to provide businesses all over the Philippines with more options for fleet upgrade or expansion and be better equipped in catering to the different logistical requirements of their clients.The 700 series of heavy-duty trucks from Hino consists of the SS2P, SH2P, FS2P and FY2P models. All models are designed for optimum performance and can be used for different applications and logistics needs.The SS2P is a 10-wheeler tractor head truck with high roof and 16-speed transmission while the SH2P is a 6-wheeler tractor head truck, also with high roof and 12-speed transmission. The SS2P supports 60-ton gross combined mass and 40 to 45 tons pulling capacity. On the other hand, the SH2P features 45.5-ton gross combined mass and 30 to 35 tons pulling capacity.The FS2P comes in two models – the FS2P Mixer Truck and the FS2P Dump Truck. Both are 10-wheeler trucks with 12-speed transmission and standard roof. The FS2P Mixer Truck comes with a 9m³ mixer body and features 32.3-ton gross vehicle weight while the FS2P Dump Truck is made to support dump body and 34-ton gross vehicle weight.The FY2P comes in three variants – the FY2P Mixer Truck, FY2P Dump Truck and FY2P Cargo Truck. All are 12-wheeler trucks with 12-speed transmission and 39.4-ton gross vehicle weight.The FY2P Mixer and FY2P Dump Trucks have standard roofs while the FY2P Cargo has a high roof. The FY2P Cargo comes with 11.8-meter overall chassis length for cargo body requirements.Supporting shift to modern transport unitsHeeding the government’s call to modernize the public transport system, Hino is one of the first to develop modern jeepney prototypes aligned with the PUV Modernization Program (PUVMP) and the Office of Transport Cooperatives (OTC) theme, “Arangkada sa Pagbabago.”Hino’s modern jeepneys use a more efficient engine and adopt green technology to reduce harm to the environment. The Euro 4-powered Class II jeepneys meet the requirements of the Bureau of Philippine Standards. They have a seating capacity of 19 passengers. Seats are side facing, resembling those of the conventional jeepney. 7 additional standing passengers can also be accommodated in the middle to maximize the vehicle’s capacity.The modern jeepneys are air-conditioned for greater commuter comfort. They are equipped with a Beep Card system, speed limiter, GPS, CCTV and a dashboard camera.Hino has turned over some of these modern jeepneys to the Pateros-Fort Bonifacio Transport Service and Multi-Purpose Cooperative (TSMC) and Taguig Transport Service Cooperative (TSC). These two are among the three preselected by the OTC to be the first to adopt the PUVMP because of their good standing, financial capability and established management structure.The Pateros-Fort Bonifacio TSMC will receive 137 Hino modern jeepney units while the Taguig TSC will get 279 units. The approved routes include Gate III of Fort Bonifacio to Guadalupe Market and Bagumbayan, Taguig to Pasig. These include the 13 air-conditioned jeepneys given to Pateros-Fort Bonifacio TSMC and 20 non-air-conditioned units given to Taguig TSC during the second turnover ceremony held late 2018.These modern jeepneys, which have been plying the roads for some months now, involve the assistance of a passenger assistance officer (PAO) in place of the Beep Card system, which has yet to be operational. PAOs collect passengers’ fares and inform the driver passengers need to get off.Broadening vehicle range, training manpowerKeen to grow its market in the Philippines, Hino will continue to broaden its line of trucks and buses to cater to the different industries. The heavy-duty trucks target businesses with heavier logistics and transport requirements. They are also ideal for businesses engaged in development projects, which are expected to increase in number on the back of the government’s Build Build Build program. The modern jeepneys are for public transport while the trucks with P11C Engine launched much earlier were aimed at boosting Hino’s position in the Heavy-Duty Truck segment.To support vehicle development efforts, Hino broke ground for a new office building and technical service training center last year. This new facility, which is expected to be completed by mid-2019, will be used to strengthen the skill set of the company’s manpower. Through this, Hino hopes to provide the best kind of training and preparation for its staff and dealers to enable them to handle different situations as truck service providers.HMP Chairman Vicente T. Mills, Jr. reaffirms the company’s commitment to offer only good-quality products and services that meet the requirements of its customers and partners. “We at Hino believe the Filipinos deserve better transportation and infrastructure. Through our Total Support principle, we hope to advance this vision further and continue to deliver only high-quality trucks and buses that Filipinos can rely on,” Mills said.“The Philippines is primed for growth, and it is during these times of changes that it is more important to have a secure, reliable and efficient logistics partner for businesses to survive. Hino will continue to develop and deliver technologies and upgrade its products to meet the country’s truck and bus requirements,” said HMP President Mr. Mitsuharu Tabata.
Philippine Resources - February 28, 2019
Hinatuan Mining Corporation (NAC-HMC) turns over Soft-shell Crab Project
Nickel Asia Corporation - Hinatuan Mining Corporation (NAC-HMC), represented by ComRel Manager Antonio B. Resuera Jr., has turned over soft-shell crab project to three (3) indigent families of its host community last November 27, 2018. The project location is at Looc, Sitio Bagong Silang, Barangay Talavera, Tagana-an, Surigao del Norte. Beneficiaries of the said project are Rosita G. Sandico, Cristine C. Baguinaon and Arnulfo C. Copag Sr. They were selected as beneficiaries of the project based on the Local Socio-Economic Profile conducted earlier as part of the commitment of NAC-HMC to contribute to a brighter future for its people and its communities. The beneficiaries are also not part of any People’s Organization (POs) in the host community. Rosita G. Sandico and Cristine C. Baguinaon reside in Looc, Sitio Bagong Silang while Arnulfo C. Copag Sr. lives at Brgy. Talavera.“Nagpasalamat kami sa amoa nadawat na proyekto gikan sa livelihood program sa NAC-HMC. Daku namo na kalipay ug kinasing-kasing namo nga pagadawaton kining proyekto nga soft-shell crab project”, (we are thankful for receiving this project from the livelihood program of NAC-HMC. We are very happy and are wholeheartedly accepting the soft-shell crab project awarded to us) said Rosita G. Sandico.She further added that, “daku kini na katabang alang kanamo, ilabi na sa among panginabuhian, ilabi na sa akoa na senior citizen na man. Nalipay kaau ko kay isa ako sa nakadawat ani na proyekto. Amo gajud kani ampingan ug palambuan aron aduna kami mapanginuhaan alang sa among panginabuhi. Sa maka usab, daghan salamat sa inyo tabang kanamo NAC-HMC” (This is a big help to us, especially on our livelihood, especially to me who is already a senior citizen. I am very happy to be selected as one of the project recipients. In return, we will try our best to take care and develop the project in order for it to be sustainable and become a steady source of income for our livelihood. Once again, I am very thankful for the help you have given us NAC-HMC).Representative of Host and Neighboring Communities (RHNC) Chairwoman and Brgy. Talavera Councilor Eulita C. Borja who was also present during the turn-over ceremony reminded the project recipients to not take for granted the project provided by NAC-HMC, saying that, “to the project recipients, please take care of the project provided by NAC-HMC as it will be helpful to your livelihood.”She was also thankful to NAC-HMC for the support it provided the residents of the host community particularly in livelihood, “Thank you for the help and for the care you have shown to the residents by helping them with livelihood projects such as this, thank you NAC-HMC for the support.”Additional supplies for the care and maintenance of the soft-shell crab project were also provided by NAC-HMC to project beneficiaries to help ensure the success and sustainability of the project. As part of the commitment of NAC-HMC to assist its host community, technical experts from the City Agriculturists Office (CAGRO) of Tagum City were also tapped for the project’s implementation. They were also the ones who helped in establishing the soft-shell and crab fattening pilot projects in the mine site of NAC-HMC.