Pudong new district, Shanghai, China.
downtime and operating costs through the improved service life of all HPGR components. Tungsten carbide blocks, bolt on retaining clamp plates and soldered Tungsten Carbide pieces (Patent no: 2011301142). • Individually clamped • Can't break off • Individual blocks can be replaced. COMPLETED HPGR ASSEMBLIES LEAVING HOFMANN
"While a SAG mill can take nearly a year from commissioning to its full operation, our HPGR takes six to eight weeks," said Dicke. There is a notable downside to HPGRs, one that has held many cash-strapped miners back from purchasing the equipment during the industry's downturn over recent years: they have a higher capital cost than SAG ...
Overall Operating Costs SAG HPGR • Adanac Moly Corp 5.30 $/t 4.56 $/t • Imperial Metals Inc. n/a 0.73 $/t* • International Moly 4.66 $/t 3.52 $/t ... 1 x HPGR 4.0 MW 2 x Ball Mills 5.6 MW each 2 x Ball Mills 5.6 MW each Screens and conveyors 0.5 MW Screens and Conveyors 1.5 MW Total drive capacity
In case of the HPGR the optimum point of operation is widely influenced by ore properties like feed size, hardness and the rate of feed. Energy cost and water savings, smaller plant footprint and extended availability are some of the main reasons why we see more …
SAG-based circuits incur lower capital costs while HPGR-based circuits incur lower operating costs. There is a need for Trade-off study. The benefits of the HPGR: • Higher energy-efficiency than SAG milling • Finer product than cone crushing • Similar transfer size to SAG milling • Reduced work index of product • Improved minerals ...
NRRI acquired the HPGR technology via Weir Minerals from the shuttered Magnetation operation and both organizations are sharing the cost of maintenance. "This is a great example of a partnership project," said Kevin Kangas, NRRI Coleraine Director.
A series of comminution tests was carried out to evaluate three multi-pass HPGR circuits and a jaw crusher- ball mill circuit. Combinations of HPGR units (1.0 m and 0.25 m diameter), jaw crushers and Bond ball mills were used to grind a 32 mm top size porphyry copper feed (BBWI = 12.1) to a product P80 size of about 150 µm.
Based on the latest study, comminution operating costs for the HPGR circuit are estimated to be $3.75 per metric ton (mt) processed compared to $5.62 per mt for the SAG milling circuit that was used in the 2018 PEA. Lumina said FL tested a master composite made from four PQ drill holes to evaluate the viability of HPGR.
comparison of hpgr - ball mill and hpgr - stirred mill circuits to the existing ag/sag mill - ball mill circuits by chengtie wang b.eng., university of science and technology beijing, 2009 a thesis submitted in partial fulfillment of the requirements for the degree of master of applied science in …
"Mine operating costs and the potential impacts of energy and grinding" highlights that savings in milling costs will significantly affect total mine operating costs. The paper shows that energy costs typically comprise one of the largest on-going costs of mining operations, of which 70% is devoted to the comminution of the ore.
High pressure grinding roll (HPGR) solutions can offer improved grinding and energy efficiency, but the technology still faces challenges in achieving more widespread adoption. Mining Magazine caught up with Christoph Hoetzel, Head of Outotec's Grinding Business Line, to find out more about HPGR technology and its future.
Grinding Circuitan overview ScienceDirect Topics. The high unit capacity SAG mill/ball mill circuit is dominant today and has contributed toward substantial savings in capital and operating costs which has in turn made many low grade high tonnage operations such as copper and gold ores feasible Future circuits may see increasing use of high pressure grinding rolls Rosas et al 2012 .
Unit milling costs are estimated to be 25% lower for the 65ktpd Expansion compared to the current 45,0000 t/d mill expansion as a result of a higher milling rate and lower operating cost of the HPGR circuit, as compared to the existing SAG mill. The above costs result in an average C1 cash cost per pound of copper of $1.19 for the first ten ...
Capital Costs and Operating Costs The indicative c omminution circuit capital and operating costs for the conventional SABC, the Pre - crush/SABC and the HPGR/ball mill circuits
Unit milling costs are estimated to be 25% lower for the 65ktpd Expansion compared to the current 45ktpd mill expansion as a result of a higher milling rate and lower operating cost of the HPGR circuit, as compared to the existing SAG mill. A unit cost breakdown is provided below. Unit Operating Costs $ per tonne milled Mine Cost per Tonne ...
costs) of ancillary systems are often not captured when doing the comparisons. The more complicated nature of the multistage crushing plants means there are more ancillary systems than a SAG mill plant, risking a skewed analysis of the operating costs, benefiting the HPGR option.
We deliver market-leading engineering, equipment and service solutions that enable our customers to improve performance, drive down costs and reduce environmental impact. Our operations span the globe and we are close to 10,200 employees, present in more than 60 countries. In 2020, FL generated revenue of DKK 16.4 billion.
However, capital and operating cost savings could be expected for the conveying and screening. In this, operating a number of HPGR in series (i.e. multi-pass operation) could increase the size reduction achieved over single-pass operation for the same cumulative specific energy input [Norgate & …
the HPGR into the process flow sheet, and converting the existing rod mills to ball mills, will allow the plant capacity to increase by 50%, and availability of the HPGR to be at 95%. The comminution circuit can be expanded to 30,000 t/d with minimal impact to the ongoing operation. High pressure grinding roll technology is gaining wider
In normal operation the SAG Mill is fed with predominantly HPGR product and 10% to 15%. fresh feed fro m the primary feed bin (actuall y a combination of RoM ore and crushed secondary cru sher ...
Capital and operating cost estimates for each of the comminution circuits are also given. The results showed that the HPGR-ball mill circuit achieved a 21% reduction in energy consumption over the existing SAG-ball mill circuit at the same P80 grind size of 160 mircons (μm).
HPGR plus ball mill – 30-34 kWh/t; VRM – 28-32 kWh/t; Source: Comminution Handbook (1) ... Table 3 shows a comparison of yearly cost for heating raw material as an operating cost. Table 3 – Cost of Operating HGG For Drying Materials. Note: The above cost is based on $3.50/MM kJ.
CSP's HPGR Rolls are uniquely designed and built for maximum performance and durability. They reduce plant operating cost per ton and cost per hour. Longer service cycles leads to significantly reduced maintenance costs and our unique HPGR Rolls design enables them to be withdrawn efficiently and replaced when wore down.
Lower costs through approx. 15% energy savings, less wear and tear, and up to 30% longer-lasting rolls. ... the machine is operating. For decades, our HPGR has been the machine of choice for efficient high-pressure grinding ... the uniform pressure profile in the milling gap results in better grinding and more even roller wear. This prolongs ...
The resulting power savings translates into an operating cost savings of CDN$0.08/t. The savings in power costs is based upon a power unit cost of CDN$0.032/kWh. For consumables, this reduction was estimated to be about CDN$0.59/t. With respect to capital cost, the HPGR option is CDN$9.45 million (M) more than the SAG option; however, within the
Based on the trade-off study, the comminution operating costs for the HPGR circuit are estimated to be $3.75 per tonne processed compared to $5.62 per tonne processed for the SAG milling circuit that was used in the 2018 PEA (1) The operating cost savings are driven by reduced costs for steel and lower power consumption
The 5.5 Mtpa Tropicana Gold Project in Western Australia adopted a HPGR ball mill comminution circuit due to the high cost of power generation and to reduce its energy footprint in line with its environmental operating licence. In order to maximise the benefit from the HPGR, closed circuit operation with wet screening at 4 mm was selected.
HPGR has been used since 1985 in the cement industry, and since 1986 in the mining industry for use in the grinding process to ensure a high level of product fineness. Full integration of this technology within Industry 4.0 is also important.". The Tebinbulak complex is …
If ball milling was completely replaced by HPGR, up to 50% of the energy needed for the dry grinding mill could be saved. In wet grinding, the energy savings are lower, yet still noticeable. Further to the reduction in energy costs, the HPGR also proved to produce higher quality grinding products and/or a better recovery.
Outotec's HRC with flanges has been proven to enhance HPGR circuit operation with overall finer product size gradation and the resulting reduction of circulating loads and energy consumption. The flanges enhance the draw-in of material into the roll gap, resulting in a wider operating gap, reducing specific energy consumption and allowing ...
Will HPGR replace SAG Mills. Of note, an HPGR circuit's mode of operation is fundamentally different to that of SAG mill. As a largely volumetric machine, the comminution specific energy in an HPGR is a function of the power drawn by the machine at a given rolls pressure setting, divided by the throughput.
HPGR product the improved grindability will result in significant cost savings for energy and from reduced labour and maintenance around fewer operating ball mills. This is especially advantageous in operation where power is a costly item, or where it is necessary to maintain the plant capacity where harder or leaner ores are encountered.
SAG-based circuits incur lower capital costs while HPGR-based circuits incur lower operating costs. There is a need for Trade-off study. The benefits of the HPGR: • Higher energy-efficiency than SAG milling • Finer product than cone crushing • Similar transfer size to SAG milling • Reduced work index of product • Improved minerals ...
FIRST YEAR OF OPERATION OF HPGR AT TROPICANA GOLD MINE – CASE STUDY *Andrew Gardula 1, Dilip Das 1 ... • Lower consumables cost – HPGR wear linings offer long service life and low maintenance cost . ... o Screen oversize recycled to HPGR • Ball Mill product reports to CIL process .
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