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Recycling method of waste hard alloy

A technology of cemented carbide and cemented carbide particles, which is applied in the direction of photographic technology, equipment, photographic auxiliary technology, etc., and can solve the problems of high energy consumption in the recycling process, low purity of recycled cemented carbide powder, and performance degradation.

Inactive Publication Date: 2021-08-31
广东正信硬质材料技术研发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of these methods are the low purity of the recycled cemented carbide powder, high energy consumption in the recycling process, and some methods such as zinc melting are harmful to operators and the environment.
A particularly serious problem is that the performance of the recycled cemented carbide bulk material obtained by sintering the recycled powder prepared by these methods is significantly lower than that of the original cemented carbide
Even if a certain amount of primary cemented carbide powder is added to the recycled cemented carbide powder prepared by these methods, the performance of the regenerated cemented carbide bulk material is far from ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of recycling method of waste cemented carbide, described method comprises the following steps:

[0026] Collect waste cemented carbide materials. The waste cemented carbide materials are mainly cobalt-tungsten alloys and / or tungsten-copper alloys. Put the waste cemented carbide materials into the cleaning box for ultrasonic cleaning to remove surface impurities such as oil stains on the surface.

[0027] The waste cemented carbide material is put into a crusher for crushing to obtain cemented carbide particles with a particle size of 2 cm.

[0028] Put the cemented carbide particles into the heating equipment, pass in oxygen and heat, heat and oxidize into loose cemented carbide oxidation products; the heating equipment is a calcining chamber, the heating temperature is 800 ° C, put the cemented carbide into the graphite boat , and then one by one continuously sent into the tubular structure calciner, so that the time for each graphite boat to enter the calciner ...

Embodiment 2

[0036] A kind of recycling method of waste cemented carbide, described method comprises the following steps:

[0037] Collect waste cemented carbide materials. The waste cemented carbide materials are mainly cobalt-tungsten alloys and / or tungsten-copper alloys. Put the waste cemented carbide materials into the cleaning box for ultrasonic cleaning to remove surface impurities such as oil stains on the surface.

[0038] The waste cemented carbide material is put into a crusher for crushing to obtain cemented carbide particles with a particle size of 1 cm.

[0039] Put the cemented carbide particles into the heating equipment, pass in oxygen and heat, and heat and oxidize into loose cemented carbide oxidation products; the heating equipment is a calcining chamber, the heating temperature is 900 ° C, and the cemented carbide is put into the graphite boat , and then one by one continuously sent into the tubular structure calciner, so that the time for each graphite boat to enter th...

Embodiment 3

[0047] A kind of recycling method of waste cemented carbide, described method comprises the following steps:

[0048] Collect waste cemented carbide materials. The waste cemented carbide materials are mainly cobalt-tungsten alloys and / or tungsten-copper alloys. Put the waste cemented carbide materials into the cleaning box for ultrasonic cleaning to remove surface impurities such as oil stains on the surface.

[0049] The waste cemented carbide material is put into a crusher for crushing to obtain cemented carbide particles with a particle size of 1 cm.

[0050] Put the cemented carbide particles into the heating equipment, pass in oxygen and heat, heat and oxidize into loose cemented carbide oxidation products; the heating equipment is a calcining chamber, the heating temperature is 1300 ° C, put the cemented carbide into the graphite boat , and then one by one continuously sent into the tubular structure calciner, so that the time for each graphite boat to enter the calciner...

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Abstract

The invention discloses a recycling method of waste hard alloy. The waste hard alloy is cleaned, crushed and heated, oxygen is introduced and heated, the waste hard alloy is heated and oxidized into a loose hard alloy oxidation product, then carbon black is added, ball milling treatment is carried out to obtain a mixed material, reduction treatment is carried out on the mixed material, vacuum sintering is carried out again, reduction is carried out in the gaseous carbon atmosphere to obtain a forming material, metal cobalt and metal tungsten are extracted from the forming material, and the method can be used for preparing a corresponding hard alloy product. The recycling method is high in recycling rate and excellent in performance.

Description

technical field [0001] The invention relates to the technical field of cemented carbide treatment, in particular to a method for recycling waste cemented carbide. Background technique [0002] With the rapid development of the economy, industries such as machinery manufacturing, geological mining, construction, electronics and chemical industry have an increasing demand for tungsten and cobalt materials that constitute the main elements of cemented carbide. As rare elements, tungsten and cobalt have very little ore reserves, and mining is becoming more and more difficult. Therefore, the recovery, extraction and reuse of tungsten and cobalt element materials in waste cemented carbide is becoming more and more important. [0003] Waste cemented carbide contains a large amount of tungsten and is regarded as a valuable second resource. Its recycling and reuse not only has very high economic benefits, but also has very important significance for the full and effective use of min...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B23/02C22B34/36C25C1/08
CPCC22B7/001C22B1/005C22B23/021C22B34/36C25C1/08
Inventor 叶惠明叶少良叶戈诸优明
Owner 广东正信硬质材料技术研发有限公司
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