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Method for preparing ferrotungsten alloy powder through molten salt electrolysis

A technology of ferrotungsten alloy and molten salt electrolysis is applied in the field of preparation of ferrotungsten alloy powder, which can solve the problems of unfriendly environment, low yield, complicated equipment, etc., and achieves improved metal direct yield, short technological process and low raw material cost. Effect

Pending Publication Date: 2022-04-08
郑文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the following two methods are mainly used for the preparation of tungsten-ferroalloy additives: (1) pair mixing method, its disadvantages are mainly serious segregation of alloy products, concentrated impurity inclusions, high burning loss rate; and high cost
(2) The internal reduction method, the main disadvantage is that the tungsten concentrate, aluminum particles and sodium nitrate mixture are in the process of reducing the high-temperature molten iron or molten steel, and the reaction slag is easily mixed with metal, resulting in tungsten-iron metal inclusions, a large number of pores, and complicated equipment. , high power consumption, low yield, unfriendly to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: 75% Na 2 WO 4 , 5% CaO and 20% NaCl mixed salt into the electrolytic cell, then FeWO 4 (Microwave heating in argon at 250°C for 24h dehydration, the total amount accounts for 20% of the total mass of the electrolyte) into the electrolytic cell, at a temperature of 1080°C, a cell voltage of 2.0V, and a current density of 1.8A / cm 2 1. The electrolysis time is 2.5 hours. Corundum is used as the structural material of the electrolytic cell, and boron nitride is used as the product collection tank to collect cathode products, which are washed with boiling water and dried. The purity of tungsten-iron alloy powder can reach 99.68%.

Embodiment 2

[0025] Example 2: 75% Na 2 WO 4 , 5% CaO and 20% NaCl mixed salt into the electrolytic cell, then FeWO 4 (Microwave heating in argon at 250°C for 24 hours, the total amount accounts for 25% of the total mass of the electrolyte) into the electrolytic cell, at a temperature of 1120°C, a cell voltage of 2.3V, a current density of 2.2A / cm2, and an electrolysis time of 3 hours, using corundum as the electrolytic cell Structural material, boron nitride is used as the product collection tank to collect cathode products, washed with boiling water, and dried. The purity of tungsten-iron alloy powder can reach 99.65%.

Embodiment 3

[0026] Example 3: 75% Na 2 WO 4 , 5% CaO and 20% NaCl mixed salt into the electrolytic cell, then FeWO 4 (Microwave heating in argon at 250°C for 24 hours, the total amount accounts for 20% of the total mass of the electrolyte) into the electrolytic cell, at a temperature of 1150°C, a cell voltage of 2.5V, and a current density of 2.5A / cm 2 . The electrolysis time is 3.5 hours. Corundum is used as the structural material of the electrolytic cell, and boron nitride is used as the product collection tank to collect cathode products, which are washed with boiling water and dried. The purity of tungsten-iron alloy powder can reach 99.67%.

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Abstract

The invention provides a method for preparing ferrotungsten alloy powder through molten salt electrolysis, an electrolyte used in the method comprises a supporting electrolyte and an active substance, and the supporting electrolyte is composed of metal tungstate, calcium oxide and metal halide.

Description

technical field [0001] The invention relates to a method for preparing tungsten-iron alloy powder, in particular to a method for preparing tungsten-iron alloy powder by molten salt electrolysis. Background technique [0002] With the rapid development of the field of high-strength alloy steel materials, the demand for ferroalloys is increasing. Ferro-tungsten alloy is one of the important iron alloys, widely used in machinery industry, defense industry and other high-tech fields. The research and development of tungsten-iron alloy has also become one of the important fields of tungsten metal research and development. Many studies have shown that tungsten-iron alloy can not only greatly improve the strength and hardness of alloy steel, but also has good stability, and can be used as an excellent additive for high-performance alloy steel materials. Therefore, the application prospect of tungsten-iron alloy in the field of high-end alloy steel is very broad . [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/04
Inventor 郑文
Owner 郑文
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