... to separate the iron, stannum, tungsten, tantalum, niobium, gold ore, colliery, monazite, rutile and zircon Product Discription of Spiral ... to separate the iron, stannum, tungsten, tantalum, niobium, gold ore, colliery, monazite, rutile and zircon of the size between ... and 0.02 mm, and the other ferrous metals and non-ferrous metals, precious metals and non-metallic minerals, which with proportion ...