Bond for 50 mm d 005 mm =, W is the work index measured in a laboratory ball mill (kilowatt-hours per metric or short ton) P 80 is the mill circuit product size in micrometers; F 80 is the mill circuit feed size in micrometers Rod mill A rotating drum causes friction and attrition between steel rods and ore particl But note

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Get Pricecritical speed on a ball mill suttonseedsindia. Ball Mill Design/Power Calculation. The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum chunk

Get Pricecopper ore, andesite and ulexite is also suggested to find out the work index of material. The Bond's grindability test can be used to determine the work index of any type of ore or These studies were carried out in a standard ball mill 300 mm X 300 mm size. The grinding media with steel balls weighing 20.125 Kgs has been used. The

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Get PriceA Bond Ball Mill Index Test (BBMWI) is a standard test for determining the Ball to determine the size of mill AMIT 135 Lesson 7 Ball Mills Circuits Mining Mill It has been recognized that the grindability of an ore in a ball mill is a function of defined the largest ball size needed based on

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Get PriceP product 80% passing size, (μm). The Bond work index (W i), is a material constant which is determined by laboratory testing procedure and in the ball mill, de-fined by F. C. Bond . For determining the Bond work index of grindability, the shortened procedure prof. N. Magdalinović [Magdalinović, 1985,

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Get PriceThe commonly used grindability tests included in the database are the Bond work indices for ball milling, rod milling and crushing; the drop weight test results A, b, Ab, DWi, Mia, Mic, Mih and ta; SAG grindability index, SGI or SPI™; and other values such as Mib and point load index. Some examples of power-based model specific energy

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Get PriceThe Hardgrove Grindability Index was developed as an empirical test to indicate how difficult it would be to grind a specific coal to the particle size necessary for effective combustion in a pulverized coal fired boiler. Its use has been extended to cover the preparation of pulverized coal for the cement, steel and chemical production industries.

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Get PriceThe specific energy is mainly a function of the ore hardness (A and and will now be included in JKTech reports of JK Drop Weight and SMC Test the expected behaviour of different ores in AG/SAG milling in exactly the same way as the Bond laboratory ball mill work index can be used to compare the grindability

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