tube mills. tube millsconsist of revolving cylinders, the interior of which is perfectly plain. they contain a number of hard balls. they differ from ball mills essentially in having the inlet for ore at one end and the outlet at the other, and in the absence of provision in the machine itself for the return of uncrushed material (oversize).,tube ball mill chinacfccc,tube ball mill is widely used in mining, smelting, road construction, building material, chemical industry, etc. the tube ball mill consists of feeding device, driving assembly, rotating assembly, bearing unit, discharging assembly and foundation unit. 1.larger effective volume and lower installed power.