... to choose the other gold , tin , titanium , tungsten, hematite , iron ore, chromite , barite , sand gold, coal and other minerals, especially ... operation and maintenance, as fine or coarse screening is widely used for sorting placer gold, tin, titanium, iron, iron ore, coal and ... improving the equipment selection than ability and recovery rate. The Iron ore Jigger contrasts were increased: Sn 3.01%, W ...