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Method for processing tungsten powder wastes

A technology of tungsten powder and waste, which is applied in the field of tungsten powder waste treatment, to achieve the effects of reducing power consumption, improving oxidation efficiency, and improving recovery rate

Inactive Publication Date: 2013-02-06
CHONGYI ZHANGYUAN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current methods of dealing with tungsten powder waste still need to be improved

Method used

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  • Method for processing tungsten powder wastes

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Experimental program
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Effect test

Embodiment 1

[0057] Dispose of tungsten powder waste following the procedure described in General Methods. Among them, the speed of pushing the boat is 2 boats / 20 minutes, and the process temperature is: the first temperature zone is 800 °C, the second temperature zone is 820 °C, the third temperature zone is 880 °C, the fourth temperature zone and the second temperature zone The fifth zone is 920°C, according to 20m 3 / h speed into the compressed air.

[0058] Preliminarily pass the tungsten powder sieve and floor fabric through a 60-mesh sieve (aperture 250 microns) to remove impurities, take 100kg of tungsten powder floor fabric that has been sieved and removed impurities, and pack it flat in a boat at 1.2kg per boat, open the front muffle The furnace door is pushed into the boat, and the front furnace door is kept open to facilitate the discharge of gas and excess air generated by the reaction. Pushing the boat continuously, after more than 5 hours of treatment, the tungsten oxide po...

Embodiment 2

[0060] Dispose of tungsten powder waste following the procedure described in General Methods. Among them, the speed of pushing the boat is 2 boats / 24min, and the process temperature is: the first temperature zone is 840 °C, the second temperature zone is 860 °C, the third temperature zone is 880 °C, the fourth and fifth temperature zones are 940℃, according to 20m 3 / h speed into the compressed air.

[0061] The tungsten powder sieve and floor coverings are preliminarily passed through a 60-mesh sieve to remove impurities, and 100kg of tungsten powder sieves and floor coverings that have been sieved and removed are packed in boats at 1.2kg per boat, and the boats are pushed continuously. The oxidized powder will change from gray to yellow powder after more than 6 hours. Pass the oxidized tungsten powder waste through a 60-mesh sieve to remove iron sheets and some oxide impurities. The oversize accounts for 0.2% and the undersize accounts for 99.8% by weight. The phase compo...

Embodiment 3

[0063] Dispose of tungsten powder waste following the procedure described in General Methods. Among them, the speed of pushing the boat is 2 boats / 28min, and the process temperature is: the first temperature zone is 880°C, the second temperature zone is 900°C, the third temperature zone is 920°C, and the fourth temperature zone is 940°C. The fifth temperature zone is 960°C, according to the 20m 3 / h speed into the compressed air.

[0064] Preliminarily pass the tungsten powder fabric through a 60-mesh sieve to remove impurities, take 100kg of the tungsten powder fabric that has been screened and remove impurities, and pack it flat in a boat at 1.2kg per boat, open the furnace door of the front muffle furnace, and push it into the boat , The front furnace door is kept open to facilitate the discharge of reaction gas and excess air. Pushing the boat continuously, after more than 6 hours of treatment, the tungsten oxide powder floor fabric turns from dark gray to yellow powder,...

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Abstract

The invention discloses a method for processing tungsten powder wastes. The method comprises the steps as follows: oxidizing the tungsten powder wastes to convert tungsten into tungsten oxide; and carrying out reaction between the oxidized tungsten powder wastes and alkali to convert the tungsten oxide into tungstate. According to the method, the tungsten powder wastes can be effectively processed.

Description

technical field [0001] The invention relates to the field of metallurgy. In particular, the present invention relates to methods of processing tungsten powder waste. Background technique [0002] With the rapid development of world economy and science and technology, industries such as metallurgical machinery, petrochemical industry, automobile industry, mining, electronic information, transportation, aerospace and national defense have gradually increased the demand for tungsten products. my country's tungsten reserves rank first in the world, and it is one of the few dominant varieties in mineral products. However, with the continuous development and utilization of tungsten resources, tungsten reserves are gradually decreasing. Therefore, the recycling of waste tungsten powder not only has huge economic benefits, but also has good social and ecological benefits. [0003] However, the current methods of dealing with tungsten powder waste still need to be improved. Conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/36
CPCY02P10/20
Inventor 赵立夫谢海根徐国钻黄一春邹兴金李红超
Owner CHONGYI ZHANGYUAN TUNGSTEN
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