Feed rate = 900 tons per day Concentrate production = 10 tons per day Assay of feed = % Cu, ... In a ball mill, the distance between the midpoint of the mill and the surface of the balls is ft. ... Calculate the tonnage of solids per hour in the underflow 18) A laboratory hydrocyclone is fed with a slurry of quartz (density 2650 kg/m 3 ...
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WhatsApp: +86 18838072829A ball mill capable of producing 30 tons per hour is likely to fall into the medium to large size category. Based on historical data, a rough estimate for a ball mill with a 30tonperhour output ...
WhatsApp: +86 18838072829Figures 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%.
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WhatsApp: +86 18838072829GATECHmo4mark. 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 18838072829that is larger than mm ( in.), or 20 mesh, and smaller than 14 mesh is separated using ... Dried or calcined rock is ground in roll or ball mills to a fine powder, typically specified as ... A typical dryer processing 230 megagrams per hour (Mg/hr) (250 tons per hour [ton/hr]) of rock will discharge between 31 and 45 dry normal cubic
WhatsApp: +86 18838072829The calculated liner and ball wear is expressed in kilograms per kilowatthour (kg/kWh), and when multiplied by the specific power (kWh/t), the wear rates are given in kilograms per ton of feed. The wear in dry ball mills is approximately onetenth of that in wet ball mills because of the inhibition of corrosion. The efficiency of ball mills as ...
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WhatsApp: +86 18838072829where v = peripheral speed of the mill in feet per minute. If the observed capacity of a mill at speed n1 is = T1 tph, the capacity T2 of the same mill at speed n2 should be . The acceleration factor of the ball or rod mass is a function of the peripheral speed of the mill. Thus. P = f4(F) = f1(D²)·f5(υ) Indicating that υ = πDn, and
WhatsApp: +86 18838072829The maximum feed size for a jaw crusher should be about 85% of the gape. ... With a typical 6:1 reduction ratio, the power consumption of a large jaw crusher (48 by 60) is approximately tons per horsepowerhour ( t/kWh). ... calculations define the efficiency of a fine stagecrush ball mill circuit as to depending on ball mill ...
WhatsApp: +86 18838072829Before we introduce the market price of the small ball mill, let's take a look at the equipment details of the small ball mill. 50 tons per hour the ball mill in this production range is generally called small ball mill. In addition to the small output, the small ball mill has no difference in production efficiency, product quality and ...
WhatsApp: +86 1883807282919. 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 ...
WhatsApp: +86 18838072829The throughput of a cement grinding ball mill can vary widely depending on the above factors and can range from a few tons per hour to several hundred tons per hour. Typically, industrial ball ...
WhatsApp: +86 18838072829W= the energy input (Work input) per ton, kwh/metric ton. WI= Work Index= specific energy per ton, kwh/metric ton (characterizes the ore) F80 = 80% passing size of the circuit feed, in microns. P80 = 80% passing size of the circuit product, in microns. Example. The dry feed of a ball mill circuit is 300 t/h. The power at the pinion of the ball ...
WhatsApp: +86 18838072829The approximate horsepower HP of a mill can be calculated from the following equation: HP = (W) (C) (Sin a) (2π) (N)/ 33000. where: W = weight of charge. C = distance of centre of gravity or charge from centre of mill in feet. a = dynamic angle of repose of the charge. N = mill speed in RPM. HP = A x B x C x L. Where.
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WhatsApp: +86 18838072829Underflow becomes ball mill feed. Select the proper size and number of cyclones for a rod mill/ball mill circuit where new feed to the rod mill is 250 metric tons per hour (MTPH) solids. Both mill discharges join together at cyclone feed sump and are pumped to cyclones. Overflow is to be 60 % 200 mesh (74 microns) at a minimum of 40% solids ...
WhatsApp: +86 18838072829The minus 152 mm (6 in) product is conveyed onto a 29,940 Mt (33,000 st) crushed ore stockpile, reclaimed by three vibrating feeders, and then conveyed to the SAG feed chute at a targeted rate of 136 Mt/hr (150 st/hr). The control strategy for the SAG mill is fairly basic. Parameters which can be adjusted are feed tons per hour and mill speed.
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WhatsApp: +86 18838072829In practice, circulating loads between ball mills and classifiers are rarely less than 200 per cent and frequently exceed 700 per cent. It may appear strange at first sight that the circulating load between a mill and classifier producing, for example, 100 tons of finished product per day can be as much as 400 tons or more, but this will be ...
WhatsApp: +86 188380728292. From the ball mill discharge size distribution calculate the %+75 μ as: 100 % = % +75 μ. 3. Calculate the CSE as the average: ( + ) ÷ 2 = % + 75 μ. In this example the ball mill circuit classification system efficiency is per cent at 75 μs. This means that
WhatsApp: +86 18838072829The raw material mill usually adopts two ways: edge drive and center drive. The materials enter the mill continuously and evenly through the feeder, and the motor drives the cylinder to rotate via the reducer.
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WhatsApp: +86 18838072829The overland conveyor is 1,817 feet long, has a capacity of 1 000 tons per hour, the belt being 42 inches wide and moving at 600 feet per minute, about 7 miles per hour. The coal is delivered into two coal staithes which has a total capacity of 48 000 tons and from the staithes it is conveyed to the boiler bunkers.
WhatsApp: +86 18838072829The Mill nominal capacity is 85 TPH. The Mill is fitted with specially profiled HiChrome Liners. Presently, the mills are operated with HiChrome Balls. The normal operating mill Power of these Mills is 1600 KW1650 KW for all types of coal to ensure the desired output of 8090 tons per hour of pulverized coal at the rated fineness. The rated
WhatsApp: +86 18838072829Few problems • A certain crusher accepts a feed of rock having diameter of in and discharge a product of diameter in. the power required to crush 12 tons per hr is hp. What should be the power required if the capacity is reduced to 10 ton per hr and as a consequence of which the diameter of product become in?
WhatsApp: +86 18838072829The numerator is calculating the volume of one swing of a jaw, times the density of material in the chamber, times the number of cycles per minute. This should give you the mass of material crushed per minute. The denominator looks wrong; to convert to mass per hour should be multiplying by 60, not dividing by 60. Dividing by 60 should give mass
WhatsApp: +86 18838072829For the purposes of this example, we will hypothesize that the the crushing index of the hard ore with the increased energy input of kw/t reduces the ball mill feed size to 6,500 micrometers. As a result, the mill output will increase with this reduced size to approximately 77,000 tons per day. The gain in production compared to the 13,000 ...
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