Grinding Brass Ashes in a Ball Mill
The 4#189;ft. by 16in. conical ball mill, operated as described in Run No. 2, if fed a dirty brass concentrate containing slag and a little coal, at the rate of 1 ton per hour, will grind the slag and coal so that a great part of it will pass a screen while the brass in the feed will be only slightly reduced in size and can be separated from the dirt by screening. The screening operation can be performed by attaching a