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Ball Tube Coal Mill Direct Level Measurement

May 01 2014nbsp018332The rate at which material is removed from a ball is proportional to the surface area of the ball at that moment in time which can be written mathematically as 1 dV t dt 4 r t 2 or dV t dt 4 k 1 r t 2 where Vt represents the instantaneous volume of the ball rt is the instantaneous radius of the ball and k 1 is the

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