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WhatsApp: +86 18203695377The ball mill work index laboratory test is conducted by grinding an ore sample prepared to passing mm (6 mesh) to product size in the range of 45150 µm (325100 mesh), thus determining the ball mill work index (Wi B or BWi). The work index calculations across a narrow size range are conducted using the appropriate laboratory work ...
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WhatsApp: +86 18203695377The acceleration factor of the ball or rod mass is a function of the peripheral speed of the mill. Thus. n = c9np/√D, the above equation becomes P = f1 (D²)·f5 (πD c9 np/√D) = cs np As a first approximation, the capacity, T, of a mill may be considered as a function of the force acting inside the mill.
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WhatsApp: +86 18203695377Bond ball mill and grind for an arbitrary number of mill revolutions (N 1 = 50, 100 or 150 revolutions). After grinding, screen the sample on the comparative sieve and determine
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WhatsApp: +86 18203695377GATECHmo4mark. mo. A continuous grinder obeying the Bond crushing law grinds a solid at the rate of 1000 kg/h from the initial diameter of 10 mm to the final diameter of 1 mm. (i) If the market now demands particles of size mm, the output rate of the grinder (in kg/h) for the same power input would be reduced to.
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WhatsApp: +86 18203695377The cost data above referred to has been compiled from actual operating results and shows the cost of milling both for the old 50ton plant and the new 100 ton concentrator, as is now in use. Note the reduction in milling costs through the use of the new flowsheet which includes an 8cell "SubA" Flotation Machine.
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WhatsApp: +86 18203695377Mills of this kind reduce 1 or 2 ton/h to an average particle size of 1 to 20 µm, with an energy requirement of about 40 kWh/metric ton. Fluid energy mills: In such mills the particles are suspended in a highvelocity gas stream which flows in a circular or elliptical path. In some design there are jets that oppose one another or ...
WhatsApp: +86 18203695377F80 is the feed size to the primary BM; T80 is the transfer size (prim mill product size), P80 is the final product (cyclone overflow) The F80 is the feed to the primary ball mill. The T80 (is the P80 of the primary ball mill and the F80 to the secondary ball mill circuit) is measured at the pipe departing the primary ball mill.
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WhatsApp: +86 18203695377An electricity cost of /kWh was used while the purchase cost of the ball mill equipment was estimated based on the feed flowrate (W [ton/hr]) according to Equation (2) (Seider, Seader, Lewin, Widagdo, 2004), and then adjusted to the 2022 dollar value via the CEPCI Index.
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WhatsApp: +86 1820369537719. A certain crusher takes rock whose average particle diameter is m and crusher is to give a product whose average particle diameter is m at the rate of 20,000 kg/hr. At this rate, the mill takes 684 kgf m/sec of power and 35 kgfm/sec power is required to run it empty. (1) What would be the power consumption in terms of HP for same capacity if the average particle diameter in ...
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WhatsApp: +86 18203695377Ball mills for fine grinding cement clinker and additives are widely used around the world. To improve the efficiency of a ball grinding ... kWhpt; for the separation, transport and other auxiliary equipment . kWhpt. The parameter qpS respectively was up of ·104 and ·104 kWhpm2. The metal content of products in the ...
WhatsApp: +86 18203695377According to Table (b), a 3 ft × 24 in. ball mill requires 10 HP motor for a rate of tons/hr, or kW/(ton/hr), a rough check of the result from the equation. Characteristics of the main types of size reduction equipment are listed in Table , including sizes of feed and product, capacity, power consumption, and average ...
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WhatsApp: +86 18203695377The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk size', product size as P80 and maximum and finally the type of circuit open/closed ...
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