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Scrap cemented carbide quenching and recycling method

A cemented carbide and waste technology, which is applied in the field of waste cemented carbide recycling, can solve the problems of low purity and yield of cemented carbide, and achieve the effects of less burning loss, high efficiency and good quenching effect.

Active Publication Date: 2020-08-07
XIAMEN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the purity and yield of the obtained cemented carbide are relatively low when the existing method is used to reclaim the waste cemented carbide, and to provide a new method for quenching and recycling the waste cemented carbide , adopting the method provided by the invention can improve the purity and the yield of the obtained cemented carbide

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  • Scrap cemented carbide quenching and recycling method
  • Scrap cemented carbide quenching and recycling method
  • Scrap cemented carbide quenching and recycling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Quenching and crushing:

[0029] Put 4.5 kg of waste cemented carbide (cobalt-tungsten alloy) rods into the graphite crucible of the intermediate frequency furnace, adjust the initial power of the intermediate frequency furnace to 3.5kw to start heating, and increase the power by 2kw every 10 minutes, and the alloy is And outside, heating up rapidly, the alloy turns red. Every time the power increases by 2kw, an infrared thermometer is used to measure the temperature on the surface of the cemented carbide. The entire heating process is only 50 minutes, and the temperature reaches about 1300°C required by the quenching process, and is kept at this quenching temperature for 1 hour. For ordinary resistance furnaces, the entire heating process takes 3 hours, and after the temperature reaches the process requirements, it needs to be kept warm for 1 hour. It can be seen that compared with the resistance furnace, the heating efficiency of the intermediate frequency furna...

Embodiment 2

[0043] (1) Quenching and crushing:

[0044] Put 6.2 kg of waste hard alloy (cobalt-tungsten alloy) rods into the graphite crucible of the intermediate frequency furnace, adjust the initial power of the intermediate frequency furnace to 3.5kw to start heating and quenching, and increase the power by 2kw every 8 minutes, the alloy is made of Inside out, the temperature rises rapidly, and the alloy turns red. Every time the power increases by 2kw, an infrared thermometer is used to measure the temperature on the surface of the cemented carbide, and the temperature rises rapidly. The entire heating process is only 40 minutes, and the temperature reaches about 1400°C required by the process, and is kept at this quenching temperature for 2 hours. For ordinary resistance furnaces, the entire heating process takes 3 hours, and after the temperature reaches the process requirements, it needs to be kept warm for 2 hours. It can be seen that compared with the resistance furnace, the he...

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Abstract

The invention belongs to the field of scrap cemented carbide recycling, and relates to a scrap cemented carbide quenching and recycling method which comprises the steps of sequentially quenching, crushing and electrolytically dissolving cleaned and dried scrap cemented carbide, wherein quenching is carried out in an intermediate frequency furnace. By adopting the method provided by the invention for quenching and recycling the scrap cemented carbide, the heating speed is fast, the efficiency is high, the energy consumption is low, a quenching effect is good, the scrap cemented carbide can be favorably crushed, the burning loss of the cemented carbide in the quenching process is low, and the purity and the yield of the obtained cemented carbide are high.

Description

technical field [0001] The invention belongs to the field of recycling waste hard alloys, in particular to a method for quenching and recycling waste hard alloys. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. At present, waste cemented carbide is usually recycled by a process including quenching, crushing and electrolysis in sequence. Among them, quenching is generally carried out in a resistance furnace. However, adopting this method to recycle waste cemented carbide, the purity and yield of the obtained cemented carbide are relatively low. Contents of the invention [0003] The purpose of the present invention is to overcome the defect that the purity and yield of the obtained cemented carbide are relatively low when the existing method is used to reclaim the waste cemented carbide, and to provide a new method for quenching and recycling the waste cemented ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/42C22B7/00
CPCC21D1/18C21D1/42C22B7/003Y02P10/20Y02P10/25
Inventor 刘会明祝小明
Owner XIAMEN TUNGSTEN