Jan 01, 1989· INTRODUCTION The energy consumption for grinding, according to Bond (1961), is deter- mined by the formula: / 10 10 (I) The work index is determined by grinding experiments carried out in a labo- ratory Bond ball mill. Based on the results of grinding experiments, numerical values of the work index Wi are calculated according to the formula: 0301-7516/89/$03.50 …
The basic parameters used inball milldesign(powercalculations), rodmillor any tumblingmillsizing are; material to be ground, characteristics, Bond Work Index, bulk density,specificdensity, desiredmilltonnage 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 …
Dec 12, 2016· The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution. The following
BMBall mill specific energyfrom T 80 17 mm to final product P 80 using Bond’s Law kWht W T Total grindingmillcircuitspecific energykWht Note that K BM is the composite of EF3 EF4 and EF5 factors forballmilling Rowland 1982 Morrell and SMCC Morrell 2004 developed a methodology for predictingspecific energywith +
The minimal magnitude of ball size is calculated in millimeters from the equation: wheredb.max is the maximum size of feed (mm); σ is compression strength (MPa); E is modulus of elasticity (MPa); ρbis density of material of balls (kg/m 3 ); D isinner diameter ofthe mill body (m)
The cost estimation andenergy-saving effects of each cement technology ..... coarse and fine grinding on the samemillbyballsize selection etc. ... which is rollermillor roller press, as coarse grinding before the existing tubemill, .... heater, which enabled reduction ofspecific energyconsumption per unit clinker by 50-
Jan 01, 2015· A particle size reduction model has been developed as the first component of an upgradedball millmodel. The model is based on aspecific energy-size reduction function, which calculates the particle breakage index, t 10, according to the size-specific energy, and then calculates the full product size distribution using the t 10 –t n relationships and the mass-size …
The basic parameters used inball mill design (powercalculations), rodmillor any tumblingmillsizing are; material to be ground, characteristics, Bond Work Index, bulk density,specificdensity, desiredmilltonnage 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 …
Balldrummillsarea commonplace in grinding offerrous and non-ferrous metals, and a cement production in the world. A significant shortcoming of thesemillsis highspecific energyconsumption on
Oct 19, 2017· Wi —specific energyconsumption, kW*h/ton; C — themilldrum rotational speed,% of the critical speed; D — themillinternal diameter, m. At result B = 25mm or less necessary to use the correction factor 1.3, i.e. the grinding balls average diameter should be …
Keeping the vibration values on the main driving motors less than 4 mm/s by periodical maintenance, thespecificelectricalenergyconsumption of themillhas reduced by 2.16% to 24.97 kWh/ton
Dec 12, 2016· The basic parameters used inball milldesign (power calculations), rodmillor any tumblingmillsizing are; material to be ground, characteristics, Bond Work Index, bulk density,specific
BMBall mill specific energyfrom T 80 17 mm to final product P 80 using Bond’s Law kWht W T Total grindingmillcircuitspecific energykWht Note that K BM is the composite of EF3 EF4 and EF5 factors forballmilling Rowland 1982 Morrell and SMCC Morrell 2004 developed a methodology for predictingspecific energywith +
how tocalculatetheenergyconsumption of aball mill.Ball Mill Specific Energy Calculate. Calculation ofenergyrequired for grinding in aball millTherefore in practice we can expect some difficulties and errors when theenergyconsumption is determined according to this formula in the case when for a given size of grinding product the value of the work index Wi which is …
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