Ball Mill Power Calculation Example #1. A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of80% passing ¼ inch(6350 microns). The required product size distribution is to be 80% passing 100 mesh (149 microns).

Thebond ball mill work indexis a measure of the resistance of the material to grinding in aball mill. it can be used to determine the grinding power required for a given throughput of material underball mill grindingconditions. it is a locked cycle test conducted in closed circuit with a laboratory screen.

Using AbrasionIndexfor calculating Steel Balls andmill. Grinding Classification Circuits robertd 20180617T0951340400 I think all of his points to a useful correlation forball millsbut an Ai model wontworkfor SAGmillsas feed size competence and charge composition are large influences That was a SAGmilloperating like aball millThe ratio is much larger inball mills

Calculation of energy required for grinding in a ball mill. Abstract. The Bond work index, W i , as an indicator of the grindability of raw materials is not a material constant but rather it changes with change of size of the grinding product.

Theball mill work indexlaboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining theball mill work index(Wi B or BWi). Thework index calculationsacross a narrow size range are conducted using the appropriate laboratorywork indexdetermination for the material size of interest, or by …

ball milldesigncalculatorDescription BondBall Mill IndexJKTech A BondBall Mill Work Indextest may be required for the design of a new mineralCalculateCost For DesigningBall MillEquipment 165 Views The Zenith is the professional mining equipments manufacturer in the world located in ChinaIndia along.

Modelling. Crushing mill work index is used in the SAGMILLING.COM Bond/Barratt specific energy consumption model . The work index is used to calculate the energy requirement to break rocks in the coarse size range, from >100 mm down to about 10 mm - 20 mm.

Theball mill work indexlaboratory test is conducted by grinding an ore sample prepared to 100% passing 3.36 mm (6 mesh) to product size in the range of 45-150 µm (325-100 mesh), thus determining theball mill work index(Wi B or BWi). Thework indexcalculations across a narrow size range are conducted using the appropriate laboratorywork...

Ball MillDesign/PowerCalculation. The basic parameters used inball milldesign (power calculations), rodmillor any tumblingmillsizing are; material to be ground, characteristics, BondWork Index, bulk density, specific density, desiredmilltonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum ‘chunk size’, product size as P80 and

Ball MillPowerCalculationExample. A wet grindingball millin closed circuit is to be fed 100 TPH of a material with awork indexof 15 and a size distribution of 80% passing ¼ inch (6350 ...

Jun 25, 2018· Let, The Size of themillfeed (80% passing) =F (microns)Work indexfor the feed = Wi kwh/s.ton %age ofmillin critical speed = Cs (percent) Specific gravity of the feed = S (gm/cm3)Milleffective diameter = D (meter) Then, Maximumballsize forball millgrinding is B(mm) Example: Size …

A method of c alculating autogenous semi. 2018-2-20mills with the rodmillandball milllaboratoryworkindices note, in figure 1, that the rodmillproduct slope is less than 05 due to an extra amount of nes present being ner than 650 m these nes proceed to theball millimproving theball.

A quick method for the Bondwork index approximate value determination, which is based on the first order grinding kinetics, is presented in this paper. ... estimating the Bondball mill work...

Ball Millsare generally used to grind material 1/4 inch and finer, down to the particle size of 20 to 75 microns. To achieve a reasonable efficiency withball mills, they must be operated in a closed system, with oversize material continuously being recirculated back into themillto be reduced.

Explain the role ofball millin mineral industry and why it is extensively used. ... It has been recognized that the grindability of an ore in aball millis a function of both feed andmillparameters:Work index, W i; Largest particle size and size distribution; Density of solids and slurry ...Calculatethemill…

The Bond low-energy impact crushingwork index(more informally, the Bond crushingwork index) is not as common as the Bondball mill work index, and it is a notoriously noisy test.. The test is a 'per-specimen' test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus.

Calculationof energy required for grinding in aball mill. ... Abstract. The Bondwork index, W i, as an indicator of the grindability of raw materials is not a material constant but rather it changes with change of size of the grinding product. ... in a Bondball mill, ...