For any process, including ball mill circuits, we can say that output equals input multiplied by efficiency* Output = Input x Efficiency In a ball mill circuit, the "output" can be defined as the production rate of fines of the circuit As for any output, ball mill circuit output is a function of both its inputs and efficienci

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Get PriceMay 22, 2019· The ball mill consists of a metal cylinder and a ball The working principle is that when the cylinder is rotated, the grinding body (ball) and the object to be polished (material) installed in the cylinder are rotated by the cylinder under the action of friction and centrifugal force

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Get Priceinvolve grinding) With Lloyd's ball milling book having sold over 2000 copies, there are probably over 1000 home built ball mills operating in just America alone This article borrows from Lloyd's research, which was obtained from the commercial ball milling industry, and explains some of the key design criteria for making your own ball mill

Get PriceEquations for power draft, capacity and work input for predicting the performance of industrial grinding mills are derived based on torque measurements using a laboratory instrumented mill These derivations are based on mechanical principles and on the first-order kinetics of the grinding process Rittinger’s, Kick’s and Bond’s laws express work input as work index (Wi) times a particle ,

Get Pricethe mill is used primarily to lift the load (medium and charge) Additional power is required to keep the mill rotating 813 Power drawn by ball, semi-autogenous and autogenous mills A simplified picture of the mill load is shown in Figure 83 Ad this can be used to establish the essential features of a model for mill ,

Get Pricevariation is between 12– 37% which is lower than mill ball filling percentage, according to the designed conditions (15%) In addition, acquired load samplings result for mill ball filling was 13% , ball mill as a function of mill`s power draw or investigation on the ball filling ratio , operating principle ,

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Get PriceM/s Holderbank Engineering, Canada has developed a control strategy for ball mills which can maintain a mill production near optimum, with little operator intervention The main principle of the concept is that maximum production is obtained from a ball mill when the mill motor power is at a maximum and consequently the specific

Get PriceKeywords: Ball mills, grinding circuit, process control I Introduction Grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical, mechanical and chemical characteristics Typical examples are the various ores, minerals, limestone, etc

Get PriceA ball mill consists of a cylindrical steel drum (with the size of 2 to 5 m in diameter and 3 to 15 m in length) and steal balls (up to 25 cm in diameter) inside of it (see Fig 1) The drum is being rotated by means of an electric drive (with power consumption of up to 1 MW) The raw

Get PriceOptimization of mill performance by using online ball and pulp measurements by B Clermont* and B de Haas* Synopsis Ball mills are usually the largest consumers of energy within a mineral concentrator Comminution is responsible for 50% of the total mineral processing cost In today’s global markets, expanding mining groups are trying

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Get PriceOleg D Neikov, in Handbook of Non-Ferrous Metal Powders, 2009 Tumbling Ball Mills Tumbling ball mills or ball mills are most widely used in both wet and dry systems, in batch and continuous operations, and on a small and large scale Grinding elements in ball mills travel at different velociti Therefore, collision force, direction and kinetic energy between two or more elements vary ,

Get PriceAs the HGI ball mill works on the same principle as pulverizing mills, the index obtained from this could give a fair assessment of the grinding capability of torrefied biomass For biomass, one should use ( Agus and Water, 1971 ; Joshi, 1978) a standard volume of sample instead of mass to compare the grinding ease to coal and torrefied biomass

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