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Based on his work, this formula can be derived for ball diameter sizing and selection: Dm <= 6 (log dk) * d^0.5 where Dm = the diameter of the single-sized balls in mm.d = the diameter of the largest chunks of ore in the mill feed in mm.

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of 10-0 mm, the size of the ball D = 9 mm evidently will be critical; having O loaded a mill, which has balls of the critical diameter of 9 mm, from batches of ouartz with an original coarseness of 10-0 mm, it will be impossible to

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where D is the mill diameter (m); L is the mill length (m); W is the total mass (t) in the mill, of balls, solids and water; V is the mill volume (m3) and J is the mill filling. Changing the constant ' K ' so that data fits as an example of the calibration process.

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A survey of Australian processing plants revealed a maximum ball mill diameter of 5.24 meters and length of 8.84 meters (Morrell, 1996). Autogenous mills range up to 12 meters in diameter. The length-to-diameter ratios in the previous table are for …

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As well as ever larger SAG mills, ball mills are also expanding in size. advantages and disadvantages of ball mill made in peru … advantages and disadvantages of ball mill made in peru in size Toromocho is in central Peru, started being made for Xstrata's Antapaccay project in Peru.

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The diameter at which the tool cuts is determined instead by how much of the ball is engaged. To calculate this effective diameter, DEFF, use the tool diameter D and the axial depth of cut DOC in the following formula:

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The SAG mill is a 40-foot-diameter mill with a 28-Megawatt ABB wraparound motor that is designed for 5,250 MTPH of throughput. While there are other 40-foot SAG mills currently installed around the world, the motor power and throughput on the Toromocho SAG mill are the largest in the world. The two ball mills are 28 feet in diameter each …

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AG/SAG mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill. All because of the range of mill sizes available, AG/SAG milling extends itself to many applications.

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Ball Mill Design Parameters. Size rated as diameter x length. Feed System. One hopper feed; Diameter 40 – 100 cm at 30° to 60° Top of feed hopper at least 1.5 meter above the center line of the mill.

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The ball impact energy on grain is proportional to the ball diameter to the third power: 3 E K 1 d b. (3) The coefficient of proportionality K 1 directly depends on the mill diameter, …

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The Toromocho deposit will be mined using conventional hard rock open pit methods. The mine will deliver 117,200 tpd (42,778 kt/yr) of sulfide flotation ore to the primary crusher and will generally move 260,274 tpd (95,000 kt/yr) of total material to assure sustained availability of the mill ore.

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and the secondary mill is a 13 ft. diameter x 21 ft. long, 2000 HP fixed speed, ball mill. When hard ore was treated, the SAG mill restricted the tonnage that could be ground. When soft ore was treated, the ball mill and spiral classifier overloaded and …

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Integrated drive technology from Siemens enhances productivity of Toromocho mine in Peru | . In future, two gearless mill drives and Sinamics cycloconverters will be used in the new production line with one SAG mill and one ball mill.

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Siemens will be delivering two gearless mill drives to meet these special Toromocho requirements. In future, the 36' SAG mill of the new production line will be operated with a 13.5-MW. A further gearless mill drive with 22 MW output will ensure equally efficient and reliable driving of a ball mill with an inner diameter of 28'. Gearless ...

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1) Rod milling – a rod mill with a diameter of 2.44 meters, inside new liners, grinding wet in open circuit. 2) Ball milling – a ball mill with a diameter of 2.44 meters, inside new liners, grinding wet in open circuit.

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