Antamina Compania Minera Antamina S.A. Peru Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 24 feet/7,32 m Ore processed: Copper/Zinc Drive Rating: SAG Mill 20,1 MW, 9,23 rpm Ball Mills 11,2 MW, 11,38 rpm
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Feb 01, 2012 A traditional top ball size was around 104 mm. Currently, 125 mm balls are in common use with some mills using 140 and 152 mm balls (165 mm balls are now being proposed). These developments have required a new approach to liner design through consideration of charge motion, especially the motion of the steel media in the mill.
Get Pricecomprising a SAG mill in closed circuit with a pebble crusher. The flow-sheet is shown in Figure 2. Figure 2: lowsheet used for “Standard” A/SA circuit simulations. The specifications for the “standard” circuit are: SAG Mill o inside shell diameter to length ratio of 2:1 with 15 cone angles o ball charge of 15 %, 125 mm …
Get PriceThe 5.5 m x 3.click here.0 m grate discharge SAG mill is installed with a 1,500 kW variable speed motor. The SAG mill draws typically an average of 745 kW, corresponding to a motor load of about 50%. Grinding ball top size is 125 mm and the ball charge ranges between 10% and 15%. Particle size of SAG mill discharge is approximately 80% passing 600 m.
Get PriceThe Critical Speed for a grinding mill is defined as the rotational speed where centrifugal forces equal gravitational forces at the mill shell's inside surface. This is the rotational speed where balls will not fall away from the mill's shell. Result #1: This mill would need to spin at RPM to be at 100% critical speed. Result #2: This mill's ...
Get PriceThe ROM SAG mill circuit—a brief description The typical ROM SAG mill circuit is depicted in Figure 1. The circuit is usually closed with either a screen or, more commonly, a cyclone for product size classification. The focus of control can be divided into two parts, viz. the mill and the cyclone. The importance of cyclone performance should ...
Get PriceWear-resistant High Chrome Cast grinding media balls for cement plant. Low carbon SAG mill grinding balls low breakage diameter 125mm. Oil quenching high Cr 18 Forged Grinding Steel Balls for Mining / Power Plant. High Hardness Chrome grinding balls / grinding media ball for cement mining. Tecnology forging and casting Sag Mill Grinding Balls ...
Get PriceBall Mill and SAG Mill Use Grinding ball and grinding cylpebs for Cement or Mine Grinding. Short Description: Grinding Ball size range from 12-125 mm, 45-65 HRC, 1-23 % Cr. content; Grinding Cylpeb of required sizes 45-65 HRC, 1-23 % Cr. content. The Grinding Media is produced by full-Auto casting lines, certified under international quality ...
Get PriceSAG milling extends itself to many applications due to the range of mill sizes available. They can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill and some or all of the work done by a ball mill. SAG mills are also an optimum solution for wet grinding since crushing and screening in these ...
Get PriceApr 17, 2018 Figures 3a & 3b give the power for an autogenous mill. Figures 4a and 4b are for the same size mill with a ball charge of 6% of mill volume (290 lbs. per cubic foot). In the above example the power was calculated for a 30% volume. However, with the same sheets the power can be determined for any volumetric loading from 15% to 35%.
Get PriceThe software uses the particular power model (Bond/Barratt, Morrell Mi, etc.) to determine what is the transfer size where the ratio of E SAG to E ball matches the ratio of mill power (1:1.5 in this example). This is the 'maximum efficiency' transfer size where the mills will both operate at full power.
Get PriceMar 21, 2007 In multi-stage ABC/SABC circuits, the AG or SAG mills are in closed circuit with screens and pebble crushers. The mill discharge from these mills consists of slurry, which goes to the ball mills for further grinding, and coarse pebbles/rocks, which are crushed and sent back to the mill.
Get PriceSAG-limited circuits (where the T 80 hits the upper limit) will result in the ball mill over-grinding unless the ball mill speed is reduced to control the grind size (in the case of a variable speed mill). Ball-limited circuits (where the T 80 hits the lower limit) will result in the charge level in the SAG mill …
Get PriceOct 15, 2020 The grinding circuit consists of a SAG mill, ball mill and cyclones. The grinding circuit will be designed to reduce ore from an 80% passing size of 76mm to 40 m. The SAG mill will be a single pinion low aspect mill, operating in a closed circuit. The mill has an inside diameter of 3.8m and an effective grinding length (EGL) of 5.0m. The mill ...
Get PriceYour problem can occur in a SAG Mill or Ball Mill. Other point to consider is the particle size distribution, it is possible to receive a finer ore from the mine and the particle size distribution of the product from the crushing circuit is different, In this case, the residence time in the tumbling mill tend to be shorter.
Get PriceDia 90mm 100mm 125mm Steel Balls Forged Grinding Media Ball; Dia 90mm 100mm 125mm Steel Balls Forged Grinding Media Ball. 2021-07-19. ... Two hot sale grinding balls specially designed for ball mill and SAG mill . Diamater mm: SY-05-B2: Application: Surface: Volumetric: Ball mill with diameter 1-8m : 15-40: 60-65: 60-65: 50-70: 60-65: 58-63: 80 ...
Get PriceJan 01, 2005 Several developments in SAG mill operation combined to make lifter face-angle a focus area: mills grew rapidly to 11.6 and 12.2 m (38 and 40 ft) diameters, mills were equipped with variable speed drives (typically allowing speeds up to 81–82% of critical), and the ‘standard’ ball size grew from 105 to 127 mm (with sizes of up to 152 mm ...
Get PriceSAG Mill Ball Sizing Grinding Classification Circuits. With high aspect ratio SAG mills total charge to ball charge ratio should be greater than 2 up to 25 for a coarse mill feed say F80 110 mm If the mill feed size is fine say 50 mm or 30 mm then you are looking at a total charge to ball charge ratio of about 1516
Get Price125 Mm Balls For Sag Mill Laboratory Ball Qm-5 Milling Planetary 4L Carbide Nose End Small Amagamtion Refine Chocolate $3,500.00-$50,000.00 / Set 1.0 Sets (Min. Order)
Get Pricedia,125mm B2 hot rolled forged steel grinding media balls, B3,B6 rolled grinding media balls, 650.000 Metric Ton, Hubei,China (Mainland) from Suizhou Gaincin Machinery Co.,Ltd on iAbrasive.com.
Get PriceDominion 28’ SAG, Nordberg 42/70HG ball mill Grinding media: High manganese steel, 125mm ball (steel lined SAG . mill) 64mm balls (rubber lined ball mill). Grind size 60%
Get PriceAG/SAG Wio, AWio (kWh/t) 28.5 Ball Mill Wio, BWio 8.6 Circuit Wio, OWio 14.6 Bond Ball Mill Work Index, BWi, kWh/t 13.4 Bond Rod Mill Work Index, RWi, kWh/t 18.1 Table 1. Example of AG/SAG Ball Mill Circuit Wio Calculations [1] [2] ABstrAct Optimum use of power in grinding, both in terms of grinding efficiency and use of installed capital, can have
Get Pricegrinding operation in a ball mill. The size analysis was performed and size fractions under 0.125 mm was collected after 5, 10 and 15 minutes of grinding. In the first stage contents of the four finest size fractions the 0-0.125 mm, 0.125( - 0.200 mm and 0.200-) were determined. Results are shown on figures 2 5.– 0% 10% 20% 30% 40% 50% 60% 70 ...
Get PriceThe feed size to ball mill shall be smaller than 25mm, the output size can be adjusted by revising steel balls ratio. Ball Mill and SAG Mill Use Grinding ball and grinding Grinding Ball size range from 12-125 mm, 45-65 HRC, 1-23 % Cr. content. Grinding Cylpeb of required sizes 45-65 HRC, 1-23 % Cr. content.
Get Priceball mill for cement specifications. Cement mill china cfc cc. Cement mill, also called cement ball mill, is a key equipment for grinding cement clinker into fine powder compared with traditional ball mills, it can increase the output by mainly used in the cement silicate product industry, the cement mill belongs to horizontal rotating mill with circle flow grinding system to a certain extent ...
Get PriceDONGBANG brand 125mm (5”) steel ball for SAG ball mill, promise you high and even volume hardness, strong impact toughness and breaking rate less than 0.3% during bulk use. Technical Datas. Application: 125mm Steel Ball For SAG Ball Mill for Iron ore mine, Gold Mine, Copper Mine, Silver Mine, etc. Certification: ISO9001, ISO14001, OHSAS18001 etc. Original: Jiangsu, China.
Get PriceThe right determine of SAG feed size. This depends on the mill diameter and the ball size. Feed size necessary to take 80% of the maximum piece of ore that will crushed by the balls. For the big SAG more than 8 meters optimal feed size will be - 50mm. Ball size - 120 ... 125mm. Do not a pebble crushing, the need secondary crushing.
Get PriceNov 26, 2019 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 ...
Get PriceThrough an innovative manufacturing process we’ve produced a ball with greater impact resistance and reduced spalling compared to the standard SAG ball, ready to perform in the highest impact SAG milling environments. PRODUCT SPECIFICATIONS. SIZE: SAG milling grinding media are available in sizes from 4.0” to 6.5” or 105 mm to 160 mm.
Get PriceA SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. [6] [7] The largest SAG mill is 42′ (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor. [8] A SAG mill with a 44′ (13.4m) diameter and a power of 35 MW (47,000 HP) has been designed. [9]
Get PriceNow I finished the calculation of flowsheet with pre-crushing, SAG mill and Ball mills. The result is follows: 1. Pre-crushing- three crusher MP-2500(Metso) for crushing from 300mm to 50mm. Two working and once in reserve. 2. Primary grinding- once SAG mill with size 42ft x 24ft, power motor 28MW. F80-50mm, p80- 2mm. 3.
Get PriceSingle stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
Get PriceOct 12, 2017 1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powder-like structures. 3.
Get PriceGrinding Down To The Nanoscale With Planetary Ball Mills. Apr 03 2013 Planetary ball mills are the most commonly used ball mills in laboratories for preparing samples ranging from soft to hard to brittle and fibrous materials The mill derives its name from the unique kinematics wherein the grinding bowls are mounted on a rotating sun disk that rotate in the opposite direction around the disk ...
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