Comparison of blue and purple tungsten in producing of ultrafine tungsten powder

Ultrafine tungsten powder, tungsten carbide powder is an important raw material of cemented carbide powder particle size and uniformity will affect the performance of cemented carbide. Now use blue tungsten tungsten powder as raw material preparation popularly, it is as long as the cold, dry hydrogen, under conditions of high hydrogen stream, a thin layer of material can be reduced with hydrogen tungsten blue Preparation methods to produce ultra-fine tungsten powder. However, in production, the hydrogen flow rate is too high, the thin layer of material of high demand will lead to improve production costs. Purple and blue tungsten oxide has a different structure, which is composed of a large number of irregular or rod needle crystals. This structure makes it have good air permeability, on the one hand he was in favor of the hydrogen into the interior of the particles, increasing the reduction reaction. On the other hand it is conducive to the discharge reduction process produces moisture. So it has a better advantage in the production of ultra-fine tungsten powder in this respect. From purple tungsten tungsten output silty material uniformly, tungsten powder particle size is smaller. The output of tungsten powder blue tungsten presents more massive, and the surface roughness, there are more irregular cracks in the powder.

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