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formula amp 39 s to calculate efficiency of ball mill


Mill (grinding) - Wikipedia

A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting ... To calculate the needed grinding work against the grain size changing three half-empirical models are used. These can .... The power predictions for ball mills typically use the following form of the Bond equation: E = 10 W ( 1 P...

Population balance approach and energy efficiency - OATAO

... batch ball mill. D. Touila, S. Belaadi a, C. Francesb, 1 ... Cement clinker, Ball mill, Dry grinding, Specific energy, Specific selection function, Blaine ... alternative to the Bond energy-size reduction equation for scale-up design (Herbst and .... efficiency factor of 39 cm2/J is obtained with an optimal average ball size of 22 mm.

Work Index - Metcom Expertise

It starts with Bond's Work Index equation: w1 ... For example, a grinding circuit is processing 450 t/h (of dry feed) with a mill drawing 3,150 kW (at the pinion). ... For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the...

Modeling on the Effect of Coal Loads on Kinetic Energy of Balls for ...

Jul 9, 2015 ... operating process for a ball mill and the ball motion, as influenced by the coal quality and the coal ... Their coal grinding efficiency is closely related to the economy of .... s (J). Coal particle number Nm. Kmax*10. Kpj*10. Wf. Ww. Ww-Kpj*10 ..... We can define the following equation based on Equation (8):. )(.

Cement mill notebook - SlideShare

Jan 7, 2015 ... 3.2 Calculation of the Critical Mill Speed: G: weight of a grinding ball in kg. w: ... The first compartment shell lining must assure an efficient lifting effect of .... Worn out state Normal state Gap Grinding energy 39 kWh/t 32 kWh/t -18% .... Nael Shabana 201019~ Loss by radiation through mill shell= R*S = 200...

Ball mill ball size calculation

Oct 21, 2016 ... Calculate and Select Ball Mill Ball Size for Optimum Grinding Aug 2, 2013 In ... grinding energy and ball-mill scaleupBall-mill scale up (Bond 39;s Law). ... Martin Chick amp; AssociatesThe Ball Mill Finish Calculator can be used ... efficiency - DiVAwell as the kinetic energy of the milling ball affected the si...

Ball Mill Design/Power Calculation - 911 Metallurgist

Mar 17, 2017 ... The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground,...

BatteryStuff Tools | Solar Calculator

For help using this calculator please read thought our detailed instructions. ... If you get 10 hours of direct sunlight, that's still only 13 amps. .... and small mills Please help me choose a system capacity of the solar system works? ..... Also I would add the battery voltage as an input and calculate the batteries in series based on...

energy savings and technology comparison using small ... - CEEC

When calculating the recommended top size ball from Bond's formula (1961) for regrind ball mill ... size is the most important variable affecting the mill efficiency. .... 41 Amps. 900 kW. 630 kW. 550 kW. 470 kW. TABLE 2. Power reduction in ball ... Regrind ball mill. Au-Cu. 9.5. 90. 6 mm. . -39%. Same. Regrind ball mill.

SAG mill circuit optimisation at Ernest Henry Mining - zenith

S. Strohmayr 1, W. Valery2 Jr. ... with the ball mill discharge in a common sump and is pumped to 840mm ..... use a Semi Autogenous Grinding (SAG) mill ball charge of 8% v/v ... would be as power efficient as a rod/ball mill circuit. ..... Speed, amps, ... JKSAGCharge is used to determine the mill charge volume and the toe.