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12/12/2016 If P is less than 80% passing 70 microns, power consumption will be. Ball Mill Power Calculation Example. A wet grinding ball mill in closed circuit is to

Get PriceEmail contactThe 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 ...

Get PriceEmail contactMost cement is currently ground in ball mills and also vertical roller mills which ... 4.1 Closed-circuit systems; 4.2 Energy consumption and output; 4.3 Clinker hardness ... input size presently mill installed with Roller Press are mostly single chambered), .... Because cement particles react with water at their surface, the specific...

Get PriceEmail contactBall mill power draw calculation to read the technical paper metcom technologies the ball mill energy being used to grind target oversize particles this paper describes definitions and example calculation the typical closed ball mill the mill power draw it is directly related to overall circuit efficiency and productivity. More Details

Get PriceEmail contactWet Ball Mill Power Draw (Bond) ... F 2 : Correction for wet open circuit since it requires more power than wet closed circuit.Based on the sieve size used to determine the work index and the percentage of the product passing this size. Power Draw Corrections [image: 135-7-14)] F 3: Correction for material in the feed that is greater than the optimum size, F 0S: Fâ†“0S = 4000[13 / Wâ ...

Get PriceEmail contactwhich can either be open circuit or closed circuit with an air classifier. Selection of right mill for the specified duty is the most critical for circuit design, since it has the highest capital and operating costs. Bond method has been used for ball mill selection in both mineral and cement industry for 50 years. It is basically rely on determination of grindability of material in a ...

Get PriceEmail contactWet Ball Mill Power Draw (Bond) ... F 2 : Correction for wet open circuit since it requires more power than wet closed circuit.Based on the sieve size used to determine the work index and the percentage of the product passing this size. Power Draw Corrections [image: 135-7-14)] F 3: Correction for material in the feed that is greater than the optimum size, F 0S: Fâ†“0S = 4000[13 / Wâ ...

Get PriceEmail contactFor many decades the two-compartment ball mill in closed circuit with a high-efficiency separator has been the mill of choice. In the last decade vertical mills have taken an increasing share of the cement milling market, not least because the specific power consumption of vertical mills is about 30% less than that of ball mills and for finely ground cement less still. The vertical mill has a ...

Get PriceEmail contactOperating data from existing mill circuit (direct proportioning) . Grinding tests in pilot scale, where the specific power consumption is determined (kWh/t dry solids) . Laboratory tests in small batch mills to determine the specific energy consumption. Energy and power calculations based on Bonds Work Index (Wi, normally expressed in kWh ...

Get PriceEmail contactA 1.5 mio t/a cement plant is having a closed circuit ball mill for cement grinding: The mill has been operating with satisfactory performance in-terms of system availability and output, however power consumption was on higher side. 3.1 System Description Mill Rated capacity 150 t/h OPC at 2800 blaine I chamber liners II chamber liners Stepped classifying Mill size 4.6 x 16.5 m L/D ratio Mill ...

Get PriceEmail contactWhere W = Net power consumption in kWh/t ... F = The 80% passing size of the feed in µm . The test is a closed circuit dry grindability test performed in a standard ball mill. It can be performed at mesh sizes ranging from 28 mesh to 400 mesh. The normal finishing size is 100 mesh. Feed Sample Requirements 10 kg of minus 6 mesh * Bond F. C., “Crushing Grinding Calculations”, Reprint ...

Get PriceEmail contactMetallurgical ContentOpen Circuit GrindingClosed Circuit GrindingGrinding Circuit Process Control VariablesGrinding Operating Costs The simplest grinding circuit consists of a ball or rod mill in closed circuit with a classifier; the flow sheet is shown in Fig. 25 and the actual layout in Fig. 9. This single-stage circuit is chiefly employed for coarse grinding when a product finer than 65 ...

Get PriceEmail contact07/01/2015 Specific power consumption for clinker/gypsum grinding in a ball mill should be approximately: 3000 cm2 /g 24.4 kWh/t 3200 cm2 /g 26.8 kWh/t 3400 cm2 /g 29.4 kWh/t 3600 cm2 /g 32.0 kWh/t 3800 cm2 /g 34.7 kWh/t 4000 cm2 /g 37.5 kWh/t Note: The specific power demand of large grinding units is 10-15% better than that of small mills. 8.1 Calculation of Cement Mill Power Consumption

Get PriceEmail contactcircuits at Palabora Mining Company. Each milling circuit consists of a rod mill followed by a ball mill in series. Crusher product (-9 mm) is fed to the rod mill, and the water is fed in ratio to the ore feed mass. The rod mill discharge is pumped, without any further water addition, to the first ball mill. The ball mill discharges to a sump ...

Get PriceEmail contactClosed-circuit systems. The efficiency of the early stages of grinding in a ball mill is much greater than that for formation of ultra-fine particles, so ball mills operate most efficiently by making a coarse product, the fine fractions of this then being separated, and the coarse part being returned to the mill inlet. The proportion of the mill-exit material returned to the inlet may vary ...

Get PriceEmail contactPer Ton Power Consumption Of Cement Mill Calculation. reducingreducing power consumption in ball mill project. Ball Mill Design/Power Calculation 2018-6-17 The basic . High pressure roller press as pre-grinding to ball mill Power consumption per ton of cement can . Get Price And Support Online; Grinding Mills Power Consumption Kw Crusher ...

Get PriceEmail contactthis power consumption is then utilized to find ball load and/or mill size. The calculation is for a closed circuit wet grinding in 0.F discharge ball mill and a simple rod mill. For grate dis-charge ball mill the appropriate correction factors are utilized(2). Description Several complex empirical equations are developed(2) relating to mill ...

Get PriceEmail contactTable 5.5 Calculation of ball mill circuit specific energy for AG/SAG mill circuits .....76 Table 5.6 Calculation of ball mill circuit specific energy for HPGR - ball mill circuits .....76 Table 5.7 Benchmarking and simulated energy versus measured energy .....77 Table 5.8 Summary of HPGR - stirred mill process design parameters .....78 Table 6.1 Comminution energy for case A.....81 Table

Get PriceEmail contactConical Ball Mills Used wet or dry, closed or open circuit, conical ball mills provide a classifying action within the body of the mill due to particles of greater size tending to reside at a point of greater diameter. This characteristic delivers increased efficiency and lower power consumption. Conical mills may also be air-swept when run dry.

Get PriceEmail contactPlant 1 – Closed-circuit ball mill with third-generation. Plant 2 – CKP (closed circuit with third-generation separator) Plant 3 – Vertical mill (kWh/t cement) CPJ 35. 30.8. 29.8. 30.4. CPJ 45 . 32.5. 30.3. 34.8. CPA (J) 55. 44.3 – – Other mill debates. Even for solid fuel grinding, there has been a minor trend back to ball mills. This is most evident for petcoke grinding, where the ...

Get PriceEmail contactWhere W = Net power consumption in kWh/t ... F = The 80% passing size of the feed in µm . The test is a closed circuit dry grindability test performed in a standard ball mill. It can be performed at mesh sizes ranging from 28 mesh to 400 mesh. The normal finishing size is 100 mesh. Feed Sample Requirements 10 kg of minus 6 mesh * Bond F. C., “Crushing Grinding Calculations”, Reprint ...

Get PriceEmail contact07/01/2015 Specific power consumption for clinker/gypsum grinding in a ball mill should be approximately: 3000 cm2 /g 24.4 kWh/t 3200 cm2 /g 26.8 kWh/t 3400 cm2 /g 29.4 kWh/t 3600 cm2 /g 32.0 kWh/t 3800 cm2 /g 34.7 kWh/t 4000 cm2 /g 37.5 kWh/t Note: The specific power demand of large grinding units is 10-15% better than that of small mills. 8.1 Calculation of Cement Mill Power Consumption

Get PriceEmail contactcement ball mill throughput calculation. calculate ball mill throughput in closed circuit. Get more info of silica sand mining process equipment for Advanced process control for the cement industry.

Get PriceEmail contacthow to calculate power consumption in ball mill TECHNICAL NOTES 8 GRINDING R P King Mineral Technologies, ball mill power calculation,Figure 85 Effect of mill filling on power draft for ball mills The data, A simple equation for calculating net power draft is, Austin's formula gives slightly higher values than Morrell's for mills that have length equal Power Consumption

Get PriceEmail contactClosed-circuit systems. The efficiency of the early stages of grinding in a ball mill is much greater than that for formation of ultra-fine particles, so ball mills operate most efficiently by making a coarse product, the fine fractions of this then being separated, and the coarse part being returned to the mill inlet. The proportion of the mill-exit material returned to the inlet may vary ...

Get PriceEmail contactA material is crushed in a jaw crusher and the average size of the particle is reduced from 5 cm to 1.3 cm with consumption of energy at the rate of 37 Watt.hr/ton. What will be the consumption of energy necessary to crush the same material of average size 8 cm to an average size 3 cm. The mechanical efficiency remains same. (a) using Rittinger's law; (b) using Kick's law.

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