Method for producing coarse particle tungsten carbide powder by tungsten-containing waste materials

Abstract

The invention belongs to the technical field of metallurgy, and discloses a method for producing coarse particle tungsten carbide powder by tungsten-containing waste materials. The tungsten-containing waste materials are subjected to impurity removal purification and oxidization roasting, then, the materials are mixed according to a certain weight ratio; then, the materials are put into a reaction furnace for reaction; tungsten carbide powder is produced by an SHS (self-propagation high-temperature synthesis) reducing method; after the discharging from the furnace, impurities are removed; after the sampling analysis qualification, drying treatment is performed; then, sieving is performed; packaging and warehouse entering are performed according to requirements of a customer. The tungsten-containing waste materials are effectively utilized; the deep processing of the tungsten-containing waste materials is realized; the resource recovery rate is high; the economic benefits are obvious; the purity of the produced tungsten carbide is high; the content of the harmful impurity elements is low; the chemical ingredients are excellent; the appearance is good.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for producing coarse-grain tungsten carbide powder from tungsten-containing waste materials. Background technique [0002] Tungsten, as an element that can form carbides, can be added to steel to improve the toughness of steel. Tungsten carbide has finer particles and higher hardness, thus greatly improving the hardness and wear resistance of steel. Tungsten increases the tempering stability, red hardness and thermal strength of steel, increases the self-diffusion activation energy of iron, and significantly increases the recrystallization temperature of steel, thereby also improving the creep ability of steel at high temperatures. [0003] Now the recycling and processing of tungsten-containing waste in China has gradually become a large-scale industry, and the tungsten-containing waste is mainly processed into sodium tungstate by wet process. High-level characteris...

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Problems solved by technology

[0003] Now the recycling and processing of tungsten-containing waste in China has gradually become a large-scale industry, and the tungsten-containing waste is mainly processed into sodium tungstate by wet process. Advanced characteristics, widely used, but this method has serious environmental pollution, and the process is more complicated

[0004] Chinese Patent Application No. 2016104601868 (Application Date: 2016.06.22) "A Method for Preparing Coarse-Grained Tungsten Carbide Using Ferro-tungsten as Raw Materials" includes using ferro-tungsten, iron and carbon as raw materials to dissolve them in iron at high temperature In the liquid, tungsten and carbon form tungsten carbide. After cooling and crystallization, crushing and acid leaching can obtain single crystal tungsten carbide particles with a particle size ranging from a few microns to hundreds of microns. However, the raw materials for this application must be tungsten iron, iron and carbon. It cannot be tungsten-containing waste, and the raw materials are limited

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