Copper-mixed tungsten powder preparation process

A copper-tungsten and powder technology, applied in the field of preparation of tungsten-copper powder, can solve the problems of difficult continuous production, complex equipment, long reaction time, etc., and achieve large-scale production, easy large-scale production, and inhibition of crystal nucleus. the effect of growth

Inactive Publication Date: 2015-07-22
LIUZHOU HAOXIANGTE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many ways to produce tungsten-copper powder, one of which is to prepare tungsten-copper powder by using copper oxide and tungsten trioxide as raw materials through hydrogen reduction reaction; the traditional hydrogen reduction process is to roast tungsten trioxide and copper oxide from raw materials, and then The tungsten-copper powder is obtained thr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 600gNa 2 WO 4 ·5H 2 O and 60 gCuSO 4 ·5H 2 O was dissolved in 2L of distilled water; 60g of hydrochloric acid was configured into a solution, slowly added dropwise to the above solution, and stirred magnetically for 30 minutes at room temperature; after stirring evenly, it was placed in a high-pressure reactor lined with polytetrafluoroethylene, and the reactor was placed in React in an oven at 80°C for 24 hours; after the reaction, cool to room temperature, filter and wash the precipitate repeatedly with distilled water and absolute ethanol; dry the precipitate in a 50°C oven for 10 hours, then put it in a muffle furnace at 400°C for 4 hours Then the powder is placed in the plasma reaction chamber, and the arc ionization argon gas generated under the conditions of working voltage of 60v and working current of 400A, the heating temperature of the plasma to the tungsten trioxide and copper oxide powder is maintained at about 1000°C, and the obtained The average ...

Embodiment 2

[0028] Take 600gNa 2 WO 4 ·5H 2 O and 66gCuSO 4 ·5H 2 O was dissolved in 2L of distilled water; 180g of hydrochloric acid was configured into a solution, slowly added dropwise to the above solution, and magnetically stirred at room temperature for 30 minutes; after stirring evenly, it was placed in a high-pressure reactor lined with polytetrafluoroethylene, and the reactor was placed in React in an oven at 100°C for 20 hours; cool to room temperature after the reaction, filter and wash the precipitate repeatedly with distilled water and absolute ethanol; dry the precipitate in a 60°C oven for 9 hours, then put it in a muffle furnace at 450°C for 3 hours Then the powder is placed in the plasma reaction chamber, and the arc ionized argon gas generated under the conditions of working voltage of 75v and working current of 600A, the heating temperature of the plasma to the tungsten trioxide and copper oxide powder is maintained at about 1300°C, and the production The obtained c...

Embodiment 3

[0030] Take 600gNa 2 WO 4 ·5H 2 O and 90gCuSO 4 ·5H 2 O was dissolved in 2L of distilled water; 300g of hydrochloric acid was formulated into a solution, slowly added dropwise to the above solution, and magnetically stirred at room temperature for 30 minutes; after stirring evenly, it was placed in a high-pressure reactor lined with polytetrafluoroethylene, and the reactor was placed in React in an oven at 120°C for 20 hours; after the reaction, cool to room temperature, filter and wash the precipitate repeatedly with distilled water and absolute ethanol; dry the precipitate in a 70°C oven for 8 hours, then put it in a muffle furnace at 500°C for 2 hours Then the powder is placed in the plasma reaction chamber, and the arc ionized argon gas generated under the conditions of working voltage of 90v and working current of 700A, the heating temperature of the plasma to the tungsten trioxide and copper oxide powder is maintained at about 1800°C, and the obtained The average par...

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PUM

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Abstract

The invention relates to a copper-mixed tungsten powder preparation process. The process includes the steps that Na2WO4.5H2O and CuSo4.5H2O are dissolved in distilled water; a hydrochloric acid solution is dropped and components are magnetically stirred and evenly mixed; a mixed solution is placed in a high-pressure reaction kettle to be heated and react; the mixed solution is cooled to the indoor temperature and filtered, and sediment is acquired; the sediment is washed and dried; the dried sediment is placed in a muffle furnace so as to be burnt, and tungsten trioxide and copper oxide powder is acquired; tungsten trioxide and copper oxide powder is placed in a plasma reaction chamber, inert gas is ionized in the reaction chamber to generate high-temperature plasma, and after being heated through the high-temperature plasma, the tungsten trioxide and copper oxide powder is reduced to tungsten-copper powder under a reducing atmosphere. By the adoption of the process, tungsten oxide and copper oxide are prepared through sodium tungstate, copper sulfate and hydrochloric acid, the tungsten-copper powder is prepared through a plasma electric arc method, due to the fact that the large temperature difference exists between the tungsten-copper powder and a cooling medium, crystal nucleus growth is effectively restrained in the nucleation promoting process, and the acquired tungsten-copper powder can reach the nanoscale.

Description

technical field [0001] The invention relates to a preparation method of tungsten copper powder. Background technique [0002] In the extraction metallurgy of tungsten copper, the importance of metal tungsten and copper powder production is obvious, and the performance of tungsten copper powder affects the performance of tungsten products to a great extent. The quality of tungsten-copper powder is the guarantee for the superior performance of tungsten-copper and tungsten-copper alloys. The tungsten-copper powder industry is facing great challenges. Purity requirements, as well as physical and process performance requirements, especially the preparation technology of ultra-fine tungsten copper powder for some special purposes has yet to be resolved. [0003] There are many ways to produce tungsten-copper powder, one of which is to prepare tungsten-copper powder by using copper oxide and tungsten trioxide as raw materials through hydrogen reduction reaction; the traditional hy...

Claims

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Application Information

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IPC IPC(8): B22F9/22
Inventor 易鉴荣林荔琍唐臻吴坚
Owner LIUZHOU HAOXIANGTE SCI & TECH
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