... easy to maintain 3, long service life the high quality drum filter of external filtration--filtration equipment1, low in ... in the department of oredressing,metallurgy,chemical industry, and papermaking.It is mainly specilized in dehydrating for ... concentrate(copper,zinc,aluminium,and nickel..),and nonmetal concentrate(sulphur,phosphorus,talc,and fluorite..) after flotation.And it is also applicated ...