The mill is designed to handle a total ball charge of 3245 t at loading with a percentage filling of 295% in both the chambers Both the chambers of the cement mill were charged with 80% of the designed charge, which works out to 86 t in Ist chamber and 172 t in the IInd chamber

Get PriceOptimum ratio between length L and diameter D, L:D is, usually, accepted in the range 156–164 The mill productivity also depends on many other factors: physical-chemical properties of feed material, filling of the mill by balls and their sizes, armor surface shape, speed of rotation, milling fineness and timely moving off of ground product

Get PriceConcrete Ingredients Calculation For Cement, Sand and Coarse Aggregate This is a Volumetric Calculation Assuming we need 2 m 3 of concrete for M20 Concrete Mix, (Mix Ratio, M20 = 1 : 15 : 3) Total Part of the Concrete = 1+15+3 = 55 Parts Therefore, Cement Quantity = (Cement Part / Concrete Parts ) * Concrete Volume

Get PriceA vertical roller mill has been installed in a Canadian cement plant for the pregrinding of Portland cement clinker It is the first application of this type of technology in the Western Hemisphere

Get PriceMar 31, 2008· The output achieved by a ball mill system varies with the mill power, the fineness of the product and the hardness of the clinker A typical general purpose Portland cement of fineness (specific surface) 340 m²kg-1 ground on an efficient closed-circuit ball mill system requires around 32 kWh per tonne, so a 10 MW mill would produce 313 tonnes ,

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Get PriceJan 07, 2015· CEMENT INDUSTRY Cement Mill Notebook QATAR NATIONAL CEMENT COMPANY DOHA-QATAR 2010 [email protected] , According to Levenson, the optimum grinding ball charge should be r - 016D The degree of ball charge varies with in the limit of 25 and 45% , 48 t/ m3 Specific gravity is 78-79 t/ m3 Example: Calculate the charge of grinding balls of ,

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Get PriceDec 08, 2009· Re: how to estimate the wear rate for Ball mill Hey; Ball wear can be measured by weighing an entire charge before and after grinding a known tonnage of materials With new balls sample of given size can be weighed before and after grinding a given tonnage and, assuming uniform wear per unit of ball surface, the total charge wear can be estimated

Get PriceWe can calculate the steel charge volume of a ball or rod mill and express it as the % of the volume within the liners that is filled with grinding media While the mill is stopped, the charge volume can be gotten by measuring the diameter inside the liners and the distance from the top of the charge to the top of the mill The % loading or change volume can then be read off the graph below or ,

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Get PriceMar 10, 2011· Re: How Can I calculate new ball size and weight desing for ball mill Hi, We have a similar mill Pregrinding with hammer crusher and mono-chamber mill Thisis what a proposed based on literture review i did and others agree its more and less correct But remember it all depends on your mill feed size after pregrinding

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Get PriceJul 22, 2010· Formulas kiln 1 Residence time in Kiln “t” = 177 (Phy)^1/2 L _____ Alpha* D*N Phy =Angle of repose for lime stone ~ 36 Degree L = length of Kiln in meter Alpha = Kiln inclination in % D = Effective diameter of Kiln in meter N = Rotation per minute rpm

Get PriceIn Grinding, selecting (calculate) the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do Often, the ball used in ball mills is oversize “just in case” Well, this safety factor can cost you much in recovery and/or mill liner wear and ,

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Get PriceFor grate discharge mills, the charge should occupy about 50% of the mill volume Bond developed a relationship that can be used to determine the percent charge by volume as a function of the vertical height above the charge, He, and the radius of the mill, R, ie, Charge% = 113-(63H C /R)

Get PriceA variation in total ball angle can be detected and linked to grinding efficiency and charge expansion This could help the operator to make the right decision and keep the mill running in such a way as to be close to the optimum pulp density (73% in the above example) It must be kept in mind that the optimum is always very close to the ,

Get Pricehow can i calculate optimum charge for cement mill - BINQ , how can i calculate optimum charge for cement mill Posted at:January 8, 2013[ 46 - 2408 Ratings] , formula of media charging in cement mill,

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