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comminution and sag mill and copper

Mill Operators' Conference 2018 29 –31 August 3 Phu Kham Comminution Flowsheet • Primary Crusher CSS ~ 110 mm • 34 ft x 18 ft (EGL) SAG mill, 13 MW • Two 24 ft x 38 ft (EGL) ball mills, 13 MW each • SAB circuit • SAG mill limited • High diorite and skarn feed • Circuit grind ~ 106 μm • Theoretical maximum comminution ...comminution in diamond-bearing kimberlite, grinding media elimination when replacing SAG mills, and improved performance in leaching and flotation resulted from micro-cracked rocks (von Michaelis, 2005) (Morley, 2006). The application of HPGRs in comminution circuits has improved in the last couple of decades and seems to be very well established

Chapter 6 Copper Production Technology The last boomin technological innovation for the copper industry occurred in the first two dec-ades of this century, whenopen pit mining, flo- tation concentration,and the reverberatory...The tests to be discussed which are used for designing SAG mills are given in Table 1 below. Since 2011, two new tests have been added to provide accurate data at low cost and are included in Table 1. The SVT and BVT are SAG pinion energy and Bond Ball Mill Wi variability tests which use the SAGDesign test method as a basis.

The Copper Mountain mine, the flagship asset of Copper Mountain Mining Corp. (CMMC), is a conventional truck/shovel open-pit operation located in southern British Columbia, which produces approximately 100 million lb of …...Mills usually have motors in the following range: SAG mill motor: 7,435 kW or an HPGR circuit with motors: Ball mill 1 (4,015 kW) and Ball mill 2 (4,152 kW) for a porphyry copper- molybdenum mine. Comparing mill operations for both open pit mining to underground mining, where the metal is separated from rock ore containing the metal mined, both ...

A small laboratory SAG mill sized to your specifications for in-house Semi-Autogenous Grindability / Comminution testing. The design shown here …...the SAG mill and ball mill was 8658 kW, which caused partial over-grinding. From experience in processing plants outside of China, the power rating of the ball mill should be higher than that of the SAG mill [5]. The pebble crusher had an over-powered configuration. The installed power draw of 630 kW

A comprehensive energy study was carried out for the Red Chris mill, which processes copper-gold ore at a rate of 30,000 tonnes per day (t/d) and is …...DESCRIPTION OF THE SAG AND BALL MILL CIRCUITS A conventional SAG and ball mill circuit (SABC) is used to treat material at a production rate of 30,000 t/d. The primary crusher product, having an 80% passing size of ~90 mm, is crushed and ground by the circuit to an 80% passing size of ~150 µm, after which it reports to rougher flotation.

in gold, copper, and silver. Mt Carlton is an open pit mining operation with ore processed using a primary crusher, single stage SAG mill and flotation to produce a concentrate for sale. Orway Mineral Consultants (OMC) was involved in the original design of the comminution circuit and the project was commissioned in late 2012, with first ...The Mount Carlton gold mine in Queensland's North East, 150km from Townsville, sits on a high-sulphidation epithermal style deposit rich in gold, copper, and silver. Mt Carlton is an open pit mining operation with ore processed using a primary crusher, single stage SAG mill and flotation to produce a concentrate for sale.

Comparison SAG Mill Ball Mill SAG/Ball Mill Ratio Average operating power draw/kW 3326 5014 0.66 Installed power of the reworked model/kW 4200 6800 0.62...The Bond ball mill work index is the most commonly used comminution testwork procedure in the Millpower 2000 database, with more than double the number of results of the second most common (the combined drop-weight test methods). The ball mill work index is defined as "the kW-hr per ton to break from infinite size to 100 µm" (Bond, 1952).

Chapter 1: Outokumpu Mills group Overview Back to index Outokumpu (former Mills) has, over many years, established itself as a leader in the development of innovative, efficient comminution equipment and related mineral processing technology. Outokumpu's mill group was created by combining the grinding mill business formerly know...mill work index 11.4 kWh/t and an average RQD of 44%. RQD values of 25% resulted in a SAG mill feed size (F80) between 55 and 60 mm and throughputs of 6200 t/h. RQD values of 55% resulted in SAG mill feed size (F80) of over 70 mm and a SAG mill throughput of 5200 t/h. The Batu Hijau SAG mill specific energy was a function of point load test and ...

autogenous (SAG) mill and two ball mills, each with 13 megawatts (MW) of installed power, was expected to be SAG mill limited when treating competent basement rock. Ausenco Services Pty Ltd (Ausenco), was engaged to help optimise and enhance the productivity of the Phu Kham comminution circuit over an eight-month period...the 40 foot diameter SAG mill installed at the Cadia Gold Copper. Mine, SAG 2001, pp 43-58 (University of British Columbia: ... and the effect on …

A small laboratory SAG mill sized to your specifications for in-house Semi-Autogenous Grindability / Comminution testing. The design shown here (customisable) is 12" x 4" with welded in 1" lifter bars. A typical Batch SAG Mill, …...SAG mill base power was estimated from pilot plant data at 7.8 kWh/t, the basis was a SABC circuit of 8% ball charge. Maximum SAG mill power was determined by deducting the installed ball mill pinion power of 7.95 kWh/t from the maximum overall circuit power of 16.7 kWh/t to give 8.75 kWh/t. Overall power for the comminution circuit (SAG plus ...

The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill's ...specialist on SAG mill design and operation. Metallurgical study design, start-up, commissioning, and operating experience on facilities around the world. EMPLOYMENT 2000-2016 DJB Consultants, Inc., North Vancouver, B.C., Canada, President and Principal Consultant specializing in comminution studies, equipment selection, and operation.

The SGI equation uses a transfer size between a SAG and ball mill; it is proposed that a synthetic transfer size of 2100 µm be used to model single-stage SAG mills. 5.9ˇ √˙˝ ˛ . ˚ 0.96 0.985˜ !"# ˝ $ ˝ √˙˝ %&'() (2) where: SGI is the SAG Grindability Index, minutes, P80 is the SAG hydrocyclone overflow 80% passing size, µm...This study analyzes the exergy efficiency of comminution using a laboratory sized dry ball mill and a copper mineral ore from central Chile. In this research, we develop a minimum work index from uniaxial compression tests results on the ore fitted to Morrell's comminution energy equation using Hukki's constant mineral parameter.

SAG Mill Comminution (SMC) Test. SGS's comminution experts use the SAG Mill Comminution (SMC) test to characterize ore samples, an important first step to grinding circuit design, optimization and production forecasting. The SMC test is an abbreviated, less expensive version of the JK Drop-weight test. Its key feature is that it is performed on ...was surprising that the Bond Rod Mill Wi average was 11.3 kWh/t. Since the ore is unusually soft, the Rod Mill Wi is probably irrelevant in determining required power for the SAG mill. Drop Weight Tests Drop Weight tests were done at Hazen and analyzed by Contract Support Services, Inc. Table 4: Summary of 6 JKTech Drop Weight Tests

The comminution circuit of Miduk Copper Complex. ... (SAG) mill in a copper plant in close and open circuits to specify the effects of ore characteristics and operational parameters on mill ...Not surprisingly, comminution is a huge expense. After all, we're crushing rocks here. Interestingly enough, the crushing isn't always the most expensive part of crushing. Crushing machinery, particularly the SAG mill is massive, and much …

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