Tungsten Oxide

With the shortage of tungsten ore resources, the utilization of tungsten resources becomes more and more urgent. Waste tungsten alloy is one of the main sources of tungsten recycle. According to statistics, about 35% of the tungsten in Europe and America developed from waste tungsten alloy recycling. With the emphasis on tungsten resources in China, the recycle rate of tungsten resources in China has been increasing year by year, and it has reached 20%. In the waste recycling process of tungsten alloy technology, recycle process of waste tungsten by sodium carbonate smelting process is relatively mature and widely applicable, much as it is used, but a lot of problems also appeared in the actual production, the most troublesome is chromium. During the leaching of waste tungsten alloy by sodium carbonate smelting process, a large amount of chromium impurity elements also enter into sodium tungstate solution, which can not meet the purity of tungsten products. The chemica...