The feed rate to the ball mill is 65 tonnes/hour and the product size is 80% passing 300pm and 45% passing 75um. The work index of the ore is kWh/tonne. (i) (ii) Sketch a flowsheet of the grinding circuit. [3] If electrical power is available at 30c/KWh, using Bonds'equation estimate the power cost in dollars per 24 hour day, required for ...
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The 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 ...
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The ball mills, the second stage grinding equipment, are in diameter and long, each with two 7800 kW motors. 52 magnetic separators are used in each of the processing lines. Two concentrate thickeners, each 45m in diameter and four tails thickeners each 90m in diameter. Four dewatering buildings, each containing seven press filters.
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8. The bond work index for a meshofgrind of 200 mesh for a rock consisting mainly of quartz is kWH/ton. How much power (in kW) is needed to reduce the material in a wetgrinding ball mill from an 80 percent passing size of 1100 micrometer to an 80 percent passing size of 80 micrometer at a capacity of 10 ton per hour? a.
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The ball, consumption for mills delivering a coarse product, all passing 8mesh and containing 10 to 20 per cent. below 200mesh, the mill being run in open circuit, is about ½ lb. per ton for steel balls and 1 lb. for cast composition balls.
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In this case the grinding circuit comprises an open circuit rod mill followed by a closedcircuit ball mill. The ball mill is most often closed over a classifier like a hydro cyclone (Fig. ) or DSM style screen with a fine cut of mm. The course material is returned to the ball mill feed and the fine screen underflow reports to the ...
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The reason for this variation in ball mill work index is because the ore at Mt. Milligan has an intrinsic exponent of in the 100 µm to 200 µm size range, not the exponent empirically measured by F. Bond. The work index increase between 100 µm and 76 µm is due to a porphyritic grain size that causes a spike in energy
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Contribute to sbmcrushers/sbmchina development by creating an account on GitHub.
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A 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 ...
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product size of 10 x 10 (4) m at the rate of 20 tonnes per hour. At this rate, the crusher consumes 40 kW of power of which 5 kW are required for running the mill empty. Calculate the power consumption if 12 tonnes/h of this product is further crushed to 5 x 10 (4) m size in the same mill? Assume that Rittinger'slaw is applicable.
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The capacity of a rock crusher depends on several factors, including the type of rock, the size of the feed material, the desired product size, and the operating conditions. For example, a small ...
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The discussion you have initiated is very interesting indeed. I too am not an expert in ball mill sizing but from what my general understanding goes, method to calculate Bond's Work Index (WI) takes into consideration a 250% circulating load and ball mill sizing is based on the WI. ... A 400% circulating load will allow more tonnes per hour of ...
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10 tonne per hour ball mill gold crushing. small quarry machine (520 ton per hour) . in size from smallbatch mills to those mills with the output of hundreds of . ball mill 10 ton per hour cost price Ore Crusher, Ore .
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10″ x 16″ Jaw Crusher. This is a popular size for the smaller yard, grave marker shop, paver mfg. or serious ranch/farmer that does not use a crusher fulltime. The throughput is respectable at 520 tons per hour, and the crusher will take up to 9″ feed material. We supply this machine with either a 20 hp 3 phase electric motor or a 20 hp ...
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Capacity: 1 10 ton per hour. Colour: Yellow. Product Size: 200 mesh. read more... LAXMI ENGINEERS. ... Semiautomatic ball mill machine, capacity: 500 kg/hour; Stone grinding mild steel quartz ball mill plant and machine... Stainless steel ball grinding mill, for industrial;
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There were T. of minus 200mesh material actually produced per hour and kw.hr. per ton of minus 200mesh material produced were required. The classifier delivered 33 T. of sand per hour. The total ballmill feed was therefore T. per hr. or 550 per cent, of the original feed. Two Stage Grinding
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The bottom parameters used in ball milling design (power calculations), rod mill or any tumbling mill page is; material to be ground, property, Bond Employment Card, bulk density, specific density, wish mill tonnage capacity DTPH, operates % stables or pulp density, feed extent as F80 and maximum 'chunk size', product size as P80 and maximum and ending the class of circuitry open/closed ...
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The ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index. For grinding circuits where the feed to a ball mill is sent directly to the classifier and the cyclone underflow feeds the ball mill (see Figure ), a question arises as to whether this practice will alter the ball mill work index (BW i) of the material ...
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In the standard AC closed circuit ball mill grindability test the work index is found from. where Pi is the opening in microns of the sieve mesh tested, and Gbp is the net grams of mesh undersize produced per revolution of the 12″ x 12″ test ball mill. The closed circuit 80% passing size P averages P1/log 20 for all sizes larger than 150 mesh.
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The apparent difference in capacities between grinding mills (listed as being the same size) is due to the fact that there is no uniform method of designating the size of a mill, for example: a 5′ x 5′ Ball Mill has a working diameter of 5′ inside the liners and has 20 per cent more capacity than all other ball mills designated as 5′ x ...
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The capacity, or throughput, of a ball mill, is directly linked to particle size of the ball mill discharge. For example, it takes approximately 3 times as long to achieve 200 mesh grind as it does to achieve 65 mesh grind. ... A desired throughput in tons per hour, and a discharge particle size must be specified to properly select the right ...
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Do you need a quick estimation of a ball mill's capacity or a simple method to estimate how much can a ball mill of a given size (diameter/lenght) grind for tonnage a product P80 size? Use these 2 tables to get you close. No BWi Bond Work Index required here BUT be aware it is only a crude approximation for "most soft ores" from F80 1 cm ...
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Particle size reduction of materials in a ball mill with the presence of metallic balls or other media dates back to the late 1800's. The basic construction of a ball mill is a cylindrical container with journals at its axis. The cylinder is filled with grinding media (ceramic or metallic balls or rods), the product to be ground is added and ...
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In the same way Fig. 3 indicates that an 800hp motor and a 101/214 or ′ by 14′ Ball Mill is required. Following is a condensed tabulation of the above selections. Sizing a Ball or Rod Mill Sizing a Crusher using >1200 Wi of Ores from Database. For your convenience, this manual lists over 1200 work indexes.
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The 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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Ball mill is a cylinder rotating at about 7080% of critical speed on two trunnions in white metal bearings or slide shoe bearings for large capacity mills. Grinding media consists balls of 34 sizes (60mm30mm) in designed proportions with large sizes in feed end and small sizes in discharge end.
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stone crusher 100 tons per hour in india « mill gold. . 100 ton per hour crusher manufacturer in . ball mill 10 ton per hour cost price Stone Crusher Machine . Sizing Of Ball Mills For 100 Tonnes Per Hour How Much Crusher.
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1. Fill the container with small metal balls. Most people prefer to use steel balls, but lead balls and even marbles can be used for your grinding. Use balls with a diameter between ½" (13 mm) and ¾" (19 mm) inside the mill. The number of balls is going to be dependent on the exact size of your drum.
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Number, size and mass of each ball size depends on mill load and whether or not the media is being added as the initial charge. For the initial chargin of a mill, Coghill and DeVaney (1937) defined the ball size as a function of the top size of the feed,, dâ†"V = K√F dB = ball size (cm) F = feed size (cm)
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Grinding Balls. Steel balls ranging from ¾ to 5 in. in diameter are used. Rods range from 1½ to 4 in. in diameter and should be 3 to 4 in. shorter than the inside mill length. Tube mills are usually fed balls smaller than 2 in., whereas 4 or 5in. balls are more commonly used for ballmill grinding.
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The blast media type, shape, size, density, and hardness, along with media acceleration and volume of media, combined with blasting distance from the workpiece, angle of ... Approx. Sq. Ft. Cleaning Per Hour Loose Mill Scale 840 Tight Mill Scale 835 at 90 PSI Pitted Paint 830 Layered Paint 825 ...
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5 ton per hour mobile gold process mill equipment. Ball mill (dry or wet process) Mobile: Min. Order: 1 Set FOB Price: . is from 1 ton per hour to 10 tons per hour. The feeding size of small jaw ..
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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%.
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C to Overflow Size Distribution Required Overflow Size Distribution Multiplier (Percent Passing) of (To Be Multiplied Specified Micron Size Times Micron Size) Example: Produce an overflow of 80% passing 149 microns (100 mesh). Multiplier from Table 1 at 80% passing =
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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