... fine grain like iron, tin, tungsten, tantalum-niobium, gold ore, coal mine, monazite, rutile, zircon and other metals. The non-metallic ... is the best concentrating equipment, especially for concentrating sand ore in seashore and riverside.The product is made of the ... grooved spiral separator to be selected by colored, ferrous metal mine, coal chemical industry, coal dressing, sulfur factory as well ...