Gravity is a double processing of one of the major equipment,which are widely used in sorting rungsten,tin,tantalum and niobium thin nonferrous matals and other precious metals and metal ores.Can also be used for sorting rail(red iron,brown iron) chromium,titanium,lead,magnanese ore stone and coal,when dealing with rungsten,tin and other minerals ,double the size of the effective recovery of 2-0.02 mm.