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Method for treating waste hard alloy

A cemented carbide and oxidation treatment technology, applied in the field of metallurgy, to achieve the effects of reducing recycling costs, increasing daily processing capacity, improving recycling efficiency and recovery rate

Inactive Publication Date: 2013-02-13
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 processing waste cemented carbide still need to be improved

Method used

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  • Method for treating waste hard alloy

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Experimental program
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Effect test

Embodiment 1

[0066] Scrap cemented carbide was processed following the procedure described in General Methods. Among them, the speed of pushing the boat is 2 boats / 25 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, and the fourth temperature zone is 900 °C ℃, the fifth temperature zone is 920℃, according to 25m 3 / h flow rate into the compressed air from the tail of the furnace.

[0067] Take 30kg of waste cemented carbide balls and place them flat in the boat at a rate of 0.7kg per boat. Open the front furnace door and push it into the boat according to the process requirements. The front furnace door is kept open to facilitate the discharge of gas and excess air generated by the reaction. Continuous push boat operation, after more than 6 hours of treatment, the oxidized waste alloy balls split from the surface to the inside, and flakes fell off. Put alloy balls and oxidized waste...

Embodiment 2

[0069] Scrap cemented carbide was processed following the procedure described in General Methods. Among them, the speed of pushing the boat is 2 boats / 35 minutes, 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 920℃, according to 25m 3 / h flow rate into the compressed air from the tail of the furnace.

[0070] Take 30kg of waste cemented carbide balls and place them flat in the boat at a rate of 0.7kg per boat. Open the front furnace door and push it into the boat according to the process requirements. 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 8 hours of treatment, the oxidized waste alloy balls split from the surface to the inside, and flakes fell off. Put alloy balls and oxidized waste cemented carbide into a ball mill fo...

Embodiment 3

[0072] Scrap cemented carbide was processed following the procedure described in General Methods. Among them, the speed of pushing the boat is 2 boats / 40 minutes, and the process temperature is: the first temperature zone is 860°C, the second temperature zone is 880°C, the third temperature zone is 900°C, and the fourth temperature zone is 940°C , the fifth temperature zone is 950℃, according to 25m 3 / h speed into the compressed air from the tail of the furnace.

[0073] Take 30kg of waste cemented carbide balls and place them flat in the boat at a rate of 0.7kg per boat. Open the front furnace door and push it into the boat according to the process requirements. The front furnace door is kept open to facilitate the discharge of gas and excess air generated by the reaction. Continuous push boat operation, after more than 10 hours of treatment, the oxidized waste alloy balls cracked from the surface to the inside, and flakes fell off. Put alloy balls and oxidized waste cemen...

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Abstract

The invention provides a method for treating waste hard alloy. The method comprises the following steps of: oxidizing the waste hard alloy to convert tungsten into tungsten oxide; and reacting the oxidized waste hard alloy with alkali to convert the tungsten oxide into tungstate. By the method, the waste hard alloy can be effectively treated.

Description

technical field [0001] The invention relates to the field of metallurgy. In particular, the present invention relates to methods of treating scrap cemented carbide. Background technique [0002] With the rapid development of the world economy, the world's demand for cemented carbide products is increasing, but as a limited resource, tungsten reserves are also decreasing. Utilizing waste cemented carbide to recover tungsten resources can not only improve the comprehensive utilization rate of tungsten resources, but also reduce the pollution of waste cemented carbide to the environment. [0003] However, the current methods of processing waste cemented carbide still need to be improved. Contents of the invention [0004] The present invention has been accomplished based on the following findings of the inventors: [0005] At present, the processing methods of waste cemented carbide at home and abroad mainly include: mechanical crushing method, zinc melting method and elec...

Claims

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Application Information

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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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