... covers an area of less, easy operation, stable ore dressing, points clear, large quantity of mineral enrichment ratio ... ,pyrite ,hematite ,limonite ,chromite ,ferberite ,tungsten ores ,tantalite ores ,coal ores ,gravity selecting for the ferrous &bib- ... stones, rutile, monazite, phosphorus b ore, tungsten, tin, tantalum, niobium ore and with ore proportion difference of other non-ferrous metal ...