设在华盛顿的美国矿物局获得了直接从精矿中生产碳化钨粉新方法的专利。据说这种方法能减少粉末生产成本的50％。而且能取代以往用仲钨酸铵生产碳化钨的方法。生产过程中,精矿在氯化物和硅酸盐的熔融混合物中分解,混合物中的钨转移到氯化物相中,矿渣成分转移到硅酸盐相中。然后,将这两种相分开,用甲烷处理氯化物相。 The U.S. Bureau of Mines in Washington received a patent for a new method of producing tungsten carbide powder directly from the concentrate. It is said that this method can reduce the cost of powder production by 50%. But also can replace the conventional method of producing tungsten carbide with ammonium paratungstate. In the production process, the concentrate is decomposed in a molten mixture of chloride and silicate, the tungsten in the mixture is transferred to the chloride phase and the slag component is transferred to the silicate phase. Then, the two phases are separated and the chloride phase is treated with methane.