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

A technology of tungsten carbide powder and tungsten waste, which is applied in the field of metallurgy, can solve the problems of low tungsten content in tungsten-containing waste, serious environmental pollution, and the inability to contain tungsten waste, etc., to achieve excellent chemical composition, low investment in process equipment, Good looking effect

Active Publication Date: 2021-11-09
青岛聚鑫园工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] 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
[0005] 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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  • Method for producing coarse-particle tungsten carbide powder by using tungsten-containing waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1). Preparation: First, the tungsten-containing waste is purified by hydrochloric acid solution, and then put into a roaster for drying and roasting. The temperature is controlled at 500°C, roasted for 8 hours, and then cooled to room temperature to obtain a tungsten content of 60%. Tungsten oxide.

[0037] (2). Calculate the required ingredients according to the tungsten content in the material, and calculate according to the following weight ratio (unit: kg):

[0038] Tungsten oxide: 765

[0039] Aluminum powder: 299

[0040] Sodium nitrate: 25

[0041] Calcium Fluoride: 30

[0042] Calcium carbide: 40

[0043] Carbon black: 20

[0044] (3). Put the above materials into the mixer and mix for 25 minutes until the materials are evenly mixed.

[0045] (4). Put the mixed materials into the prepared reaction furnace several times, first make the volume of the mixed materials account for one-third of the inner volume of the reaction furnace, ignite, control the tempe...

Embodiment 2

[0049] (1). Preparation: First, the tungsten-containing waste is purified by sulfuric acid solution, and then put into a roaster for drying and roasting. The temperature is controlled at 500 ° C, roasted for 8 hours, and then cooled to room temperature to obtain a tungsten content of 65%. Tungsten oxide.

[0050] (2). Calculate the required ingredients according to the tungsten content in the material, and calculate according to the following weight ratio (unit: kg):

[0051] Tungsten oxide: 765

[0052] Aluminum powder: 299

[0053] Sodium nitrate: 25

[0054] Calcium Fluoride: 30

[0055] Calcium carbide: 20

[0056] Carbon black: 60

[0057] (3). Put the above materials into the mixer and mix for 30 minutes until the materials are evenly mixed.

[0058] (4). Put the mixed materials into the prepared reaction furnace several times, first make the volume of the mixed materials account for one-third of the inner volume of the reaction furnace, ignite, control the tempera...

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Abstract

The invention belongs to the technical field of metallurgy, and discloses a method for producing coarse-particle tungsten carbide powder by using tungsten-containing waste. The method comprises the following steps: after the tungsten-containing waste is subjected to impurity removal, purification and oxidizing roasting, mixing the materials according to a certain weight ratio, then putting the mixture into a reaction furnace, reacting, producing tungsten carbide powder by an SHS reduction method, removing impurities after discharging, sampling and analyzing to be qualified, drying, screening, and packaging and warehousing according to customer requirements. The tungsten-containing waste is effectively utilized, deep processing of the tungsten-containing waste is achieved, the resource recovery rate is high, and economic benefits are remarkable; and the produced tungsten carbide is high in purity, low in harmful impurity element content, excellent in chemical component and good in appearance.

Description

[0001] This application is a divisional application for an invention patent with an application date of June 12, 2017, an application number of 201710436811.X, and an invention title of "A Method for Producing Coarse Tungsten Carbide Powder Using Tungsten-Containing Waste". technical field [0002] 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 [0003] 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 abi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/949
CPCC01P2006/80C01B32/949Y02P10/20
Inventor 冯国升冯相聚
Owner 青岛聚鑫园工贸有限公司
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