As mentioned earlier pebble mills are widely used in the North American taconite iron ore operations Since the weight of pebbles per unit volume is 3555 of that of steel balls and as the power input is directly proportional to the volume weight of the grinding medium the power input and capacity of pebble mills are correspondingly lower
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Live ChatFrom blasting to crushing to separation more than 85 of the iron mined in the united states is mined in northeastern minnesota to make our nations steel blasting taconite is a very hard rock using explosives the taconite is blasted into small pieces transportation the taconite pieces are scooped up by electric shovels each
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Live ChatSino iron magnetite project is a 140 million metric tons per annum processing plant producing 80 million tons of concentrate per annum all this iron ore is processed through six of the worlds largest ag mills 122 m diameter 215 11 m long with 28 mw drives and six 79 m diameter 215 136 m long ball mills with dual 78 mw drives
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