domestic 8.8 × 4.8 m SAG mill ( diameter represents nominal diameter, and length of the mill represents the effective grinding length inside the end liners and discharge grates), 6.2 × 9.5 m overflow ball mill and closed stockpile (maximum storage capacity at 120,000 t, effective storage capacity at 39,000 t). Figure 1.
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SAG mills are essentially autogenous mills, but utilize grinding balls in addition to large rocks to aid in grinding. A SAG mill is generally used as a primary or first stage grinding solution. SAG mills are used at gold, copper and platinum mines with appliions also in
New and Used Ore Processing and Grinding Mills for Sale Savona Equipment is an ore processing and grinding mills supplier worldwide. We supply grinding mills for primary ore processing plants through to secondary and tertiary ore processing facilities. We buy, sell and consign grinding mills of all leading suppliers including , FL, CITIC, Polysius, ABB Ltd, Polysius, Koppern and
the cost in power to run the mill if the power cost is $27.78 per GJ. 9.9. An SAG mill of diameter 9.0 m and width 6.0 m was charged to 40% of the mill volume with ore of SG 3.2 when the porosity was 38%. With grinding time the ball load changed from 10% to 5% and the bed porosity to 12%.
from 1.4 to 34 kWh/t and Bond ball mill work index values vary from 6 to 24 kW/t for the same ores. Project design tonnages varied from 200 to 150,000 t/d, SAG mill sizes varied from 10 ft to 40 ft diameter in multiple SAG mills, and ball mill sizes varied from 7 ft to 27 ft in diameter. Calculated SAG pinion energy for full scale plant
mills: the mill diameter, effective grinding length, charge filling, and so on. The operating power draw of the mill and, consequently, the motor torque consumed will vary during mill operation as the operating parameters vary. The SAG mill power draw model of Austin (using the calibration by Doll, 2013) is used to predict the process power
86 Dm L L c Dt Figure 8.6 Geometry of a mill with cylindrical ends. All dimensions are inside liners. Lc = centerline length. L = belly length. Dm = mill diameter. Dt = trunnion diameter. The noload power accounts for all frictional and mechanical losses in the drive system of the mill and can be calculated
Tega is delivering epic performance in giant sized mills creating one of the most interesting case studies in the history of the mill lining, featuring Tega DynaPrime, a product of Tega DynaMax range. The case study is being presented at the SAG Conference 2019 held in Vancouver from 22nd September 2019 to 26th September 2019.
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A raw material feeded to AG/SAG mill as 200250 mm can be taken at the mill discharge as 1 mm and below size. Thus, subsequent ball mill efficiency would increase in the grinding circuit. There are different design options for supply and discharge arrangements. AG/SAG mills are available with rubber or
Morgardshammar pebble/sag mill, 19.35'' (5.9 m) diameter x 27.88'' (8.5 m) long, 21,877 hp (1,400 kW) motors. Currently configured as a grate discharge sag or pebble mill. No liners included. Units consists of: shell (6 pcs, three cans, split horizontally), feed end head (1 piece), discharge end head (2 pieces), FE trunnion, DE trunnion, FE
Used koppers 27 listings. ( ) SAG MIll 6800 HP. Manufacturer: 32 x 12 ft (9.8 x 3.7 m) Hardinge Koppers SAG Mill 6800 HP (5100 kW) Two GE wound rotor induction motors: 3400 HP 710 RPM 4000 V Includes motor starter. Includes lube system and temperature sensors. 267 teeth Pinion gear, 19 teeth, 6" dia shaft
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SAG mill can operate at a reasonable ef ciency if the ﬁ nal ﬁ in a 300 mm diameter mill. This test has been further developed by Starkey, Hindstrom and Orser (2006). This test now includes a Bond Ball mill work index test. 1.27 for the rod mill and 0.67 for the ball mill. The particle size
Description "REFURBISHED – WORK READY" Dominion Engineering 12.5'' Diameter x 16′ Long Ball Mill – Model No.: GB 12X15 – Actual Size: 12''6" Diameter x 15''8" Long – 1 Piece Shell with Inside Liner Rubber Backing
Median 2.81 8.52 14.27 0.59 Average 3.01 9.57 14.31 0.65 (IMPC) 2010 PROCEEDINGS / BRISBANE, QLD, AUSTRALIA / 6 10 SEPTEMBER 2010 SAG MILL GRINDING DESIGN VERSUS GEOMETALLURGY – GETTING IT RIGHT FOR COMPETENT ORES 3 FIG 3 Database SAG and bond data 2004 were with commercial SAG mills of 16.5 ft and 28 ft diameter respectively. Table 3
Jul 22, 2014 · SAG is an acronym for SemiAutogenous Grinding, which means that it utilizes steel balls in addition to large rocks for grinding. It has a large diameter and short length. It rotates, tumbling its
autogenous (SAG) Mill via an utilized method. Miduk copper concentrator is loed in Kerman Province, Iran, and its size reduction stage includes one gyratory crusher which feeds one SAG mill (9.75 dia.(m)*3.88 length(m)) following two parallel ball mills (5dia.(m)*7lenght(m)). After SAG mill, a
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• 28 MW GMD for a 40'' SAG mill • 28 MW GMD for 42'' SAG mill Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), ABB''s GMDs are well positioned to contribute to the building of larger and ever more powerful mills. — Leading the gearless mill drive evolution The ABB gearless mill drive (GMD) is the most powerful
The 4.27 Ø m x 12.94 m EGL secondary ball mill is fitted with a 4125 kW motor and operates in overflow configuration. Ball mill discharge slurry gravitates to the feed of the SAG mill discharge screen situated above the mill discharge hopper. In 2002, the grinding circuit became SAG mill limited by the competency of the mill feed. In
Machinery and Equipment is one of the largest used mining equipment dealers Worldwide and offers Used SAG mills for sale. View our online inventory of used SAG mills and send us your request today.
The primary mill is a Ø 8.50 m inside shell diameter x 3.68 m EGL (27.9 ft x 12.2 ft) SAG mill equipped with a 4,900 kW variable speed drive. The SAG mill discharge passes over a trommel. The trommel oversize material is discharged onto a conveyor and the pebbles are crushed in a 315 kW pebble crusher prior to return to the SAG mill feed.
We have 44 years experience designing, manufacturing, installing and commissioning SAG and Ball Mill grinding equipment. We have nearly 30 years experience procuring and reapplying used grinding equipment to new mining projects, often with significant lead time and capital cost savings over the purchase of new equipment.
Mills and GMDs Maarten van de Vijfeijken* looks at large, larger and the largest units in grinding ore (no ball mill after the SAG mill) and has a diameter and length of 32'', driven by a 16.5 MW GMD from ABB. Above the Arctic Circle in Sweden, Boliden first GMDs for two 27'' ball mills in Chile with a rated power of 18.6 MW each
SAG MILL DISCHARGE SCREENSTROMMEL vs. VIBRATING Tony Moon, RTZ What I''d like to talk about is probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use vibrating screens or trommel screens? What many of you probably don''t realize is that at
Sep 23, 2019 ·ಛ. 10:30. SAG Mill Ball Charge Modelling at Mount Milligan, Simonian, Grates Plugging in High Diameter SAG Mills: An Overview on Operational Analysis, Olmedo & Rioseco. 36. 14:15. The Dynamic Influence of Ball Mill Wearing Profile in Mill Performance, Torrealba, Dupont, &
The Coalition for Energy Efficient Comminution (CEEC) has been established and is supported by a broad range of mining sector companies keen to accelerate awareness, knowledge transfer and, by impliion, improve energy and cost outcomes in the substantive area of comminution.
Table of Contents Autogenous Grinding CircuitsSAG vs Ball Mill AdvantagesAG & SAG Mill Grinding Compared – Which is BestTesting for Product Size Size reduction is the most expensive operation in most mills. Crushing and grinding usually require the greatest portion of capital costs and often make up 6070 percent of total mill operating costs as shown in Figure 1.
Mill Capacity Open SAG Plant Diameter, feet Diameter, feet Long, feet Screen tph Wide, mm Long, mm Area, % C.M.D.I. Collahuasi 32 14,4 13,6 No 1.320 15 30 27
Design of the 40 foot diameter SAG mill installed at the Cadia gold copper mine All content in this area was uploaded by S. Morrell on Feb 27, 2015 . The chapter describes SAG mill
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