Violet tungsten oxide is the most suitable raw material for the preparation of tungsten powder. For the industrial chain of the tungsten products industry, the most important use of violet tungsten is to manufacture and produce nano-tungsten powder, which in turn provides a good material basis for the manufacture of high-performance cemented carbide. Nano tungsten powder refers to the powder whose particles are as fine as nanometer level in tungsten powder.
Domestic nanotechnology is far less mature than that of Europe, America and Japan. How to produce nanoscale ultra-fine tungsten powder based on the existing equipment and process technology and optimize the production process is a technical problem that various tungsten product manufacturers are competing to overcome. This article introduces Using APT as raw material, high-quality purple tungsten oxide was prepared by calcination, its reduction process parameters were optimized, the technology and process of preparing the tungsten powder were determined, and various process parameters affecting the reduction of the tungsten were analyzed. The literature shows that violet tungsten is the most suitable material for preparing tungsten powder with fine and uniform particle size. The ultrafine tungsten powder produced by it is fine and uniform, and the particles are well dispersed. It is suitable as a raw material for ultrafine cemented carbide. .
Some experts did a preparation test of purple tungsten oxide, analyzed its hydrogen reduction process, the formation mechanism of tungsten powder particles, and its hydrogen reduction process conditions. After the above comprehensive analysis, it was concluded that the reduction temperature must be lowered to prepare the tungsten powder. Slow down the speed of pushing the boat, reduce the amount of boat loading and increase the hydrogen flow, and dry hydrogen reduction.
The nano-tungsten powder prepared by purple tungsten oxide will inevitably agglomerate. Once agglomerated, its superiority is difficult to give full play to, and the performance of the material is easy to deteriorate. Therefore, effective measures should be taken to remove the agglomeration in practical applications, such as adding surface active Agents or jet milling classification to eliminate nano-powder agglomeration. In this experiment, the method of jet milling and classification was adopted.
Experiments show that the advantages of violet tungsten to prepare nano-tungsten powder are:
- Violet tungsten oxide has large specific surface area, high activity, low oxygen index and good gas permeability, and is the most suitable raw material for preparing nano-scale tungsten powder.
- Violet tungsten oxide adopts the traditional hydrogen reduction process. By optimizing the reduction process parameters, high-quality tungsten powder can be prepared. This preparation method has a short process, high stability, and does not emit CO2 gas to the atmosphere. It is an environmentally friendly production method .
More details of violet tungsten oxide product, please visit website: violet-tungsten-oxide.com
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