Tungsten Oxide Hydrogen Reduction – Carbonization Method

Hydrogen reduction – carbonization method produces tungsten powder having a simple operation, coating reasonable, stable and reliable advantages. the process of hydrogen reduction is: tungsten oxide →hydrogen reduction →sieving → blending → tungsten powder.

With the improvement of tungsten powder manufacturing level, has made great progress in the selection of tungsten oxide raw materials. Starting with tungstate (H2WO4) and yellow tungsten oxide (WO3) and now widely used blue tungsten oxide (referred to WO2.90) and purple tungsten oxide (referred to WO2.72 ) as a raw material. Structure, components and their physical and chemical properties of raw materials have great impact on tungsten powder particle size and uniformity. During the restore process, by regulating the various process parameters can control the particle size of the tungsten powder, such as the temperature of reduction, material thickness, hydrogen flow, ventilation direction.

The method for producing tungsten carbide powder is using tungsten oxide producing tungsten power then tungsten powder mix with carbon back making tungsten carbide powder. At the first using  method mixed tungsten powder and carbon black at 1400~1600℃high temperature carbonization and get WC powder. Since the method can not make tungsten powder and carbon full contact, easily lead to incomplete carbonation. Then switch to using hydrogen reduction, firstly hydrogen will react with black carbon and producing hydrocarbon. And then carbon-containing gas will carbonize tungsten powder to tungsten carbide powder.

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

 

• < Prev
• Next >