Send us an assay of your ore to evaluate. If you have a supply of tungsten concentrates please contact us. We reduce these materials into pure tungsten powder and tungsten carbide powder.Īs a leading tungsten powder producer we always have a need for more raw materials. They chemically treat the material to remove impurities to make the intermediates APT, BTO and YTO. We send them to our joint venture company Niagara Refining for processing. Magnetic separators can further increase concentrations in some ore bodies. Float cells can also improve the quality by using chemicals.īuffalo Tungsten purchases tungsten ores and concentrates. After crushing the ore it passes over shaker tables with water and the lower density materials are the tailings. ![]() Tungsten has a high density so gravity methods separate it from the waste rock. The ore is concentrated at the mine site until it reaches 65% tungsten oxide (WO 3) content. Britannica notes that it “commonly occurs as compact or granular masses in contact metasomatic deposits, high temperature veins, and granite pegmatites.” It is white or brown as seen in the photo below. Scheelite (CaWO 4) is a calcium based tungsten ore. As seen in the photo below wolframite is black or brown in color. Those with very high manganese concentrations are hubnerite (heubnerite). Ore TypesĮncyclopedia Britannica indicates that Wolframite ((Fe,Mn)WO 4) “is commonly associated with tin ore in and around granite.” Wolframite ore with very high iron concentrations is ferberite. The primary types of tungsten ores and concentrates are wolframite and scheelite. China is the top ore producer, with over half of the world’s supply. It is found in several compounds and is mined in underground and open pit mines all over the world. Tungsten is an elemental metal with the chemical symbol W.
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