A method for comprehensive recovery of waste iron-based diamond tools

A diamond and fund technology, applied in the field of comprehensive recovery of waste iron-based diamond tools, can solve the problems of environmental pollution, a large number of toxic gases, high separation and extraction costs, and achieve the effect of efficient recovery

Inactive Publication Date: 2018-07-27
周小纯
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Problems solved by technology

[0006] The recovery of waste diamond tools by simple acid leaching process has the following defects: first, a large amount of toxic gases such as nitrogen monoxide and nitrogen dioxide will be produced during the acid leaching process; second, the obtained solution is mixed metal Salt solution, the cost of separation and extraction is high, and metal copper is often recovered by simple replacement, so most of the waste liquid generated is secretly discharged without any environmental protection treatment, causing serious environmental pollution problems

Method used

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  • A method for comprehensive recovery of waste iron-based diamond tools

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Embodiment 1

[0037] Be 3 meters in diameter, in deep 3 meters reaction tank, add 15 cubic meters of dilute sulfuric acid of 15wt%, sodium sulfite 23.6kg, sodium chloride 12.4kg, obtain leaching agent, the redox potential of leaching agent is 343mv now. Heating to 70 degrees Celsius; then 4 tons of waste metal-based diamond tools are put into the reaction tank; in the waste metal-based diamond tool materials, diamond 2.8wt%, iron 70wt%, copper 15wt%, nickel 1wt%, zinc 3wt%, Tin 2wt%, lead 2wt%. Under the condition of isolating the air (i.e. isolating the reaction tank and the air channel of the outside world); react, during the reaction, stop heating, the solution temperature gradually rises to about 90 degrees Celsius by itself due to the exothermic reaction, and the Fe in the solution 2+ The concentration is also getting higher and higher, and the concentration of free sulfuric acid is getting lower and lower. After the reaction was carried out for about 6 hours, the concentration of sul...

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Abstract

The invention relates to a comprehensive recovery method of a waste iron-based diamond tool, and belongs to the technical field of comprehensive utilization of resources. The comprehensive recovery method comprises the following steps: heating a leaching agent to 70-90 DEG C, submerging the waste iron-based diamond tool in the leaching agent under an air isolation condition for soaking, performing solid-liquid separation after soaking to obtain a leaching solution and a solid A, crushing the solid A to obtain diamond particles and metallic particles containing zero valent copper, sieving to separate the diamond particles from the metallic particles containing zero valent copper, wherein the leaching agent is non-oxidizing acid. The comprehensive recovery method of the waste iron-based diamond tool has the advantages of being simple in process, easy to operate, environment-friendly, low in cost and high in output product valve, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a method for comprehensively recycling waste iron-based diamond tools, belonging to the technical field of resource comprehensive utilization. Background technique [0002] Diamond is the hardest substance found in nature so far. It is widely used in geological drilling and hard and brittle substances, such as cutting, grinding and drilling of jewelry, stone, ceramics, hard alloys, semiconductor crystals, magnetic materials, etc. , because diamonds are all in the form of fine particles, they need to be made into tools with certain shapes and certain mechanical properties by using materials before they can be used. Diamond tools are tools of various types and specifications made of diamond as the abrasive and metal powder as the matrix through pressing and sintering processes. They are widely used in cutting, drilling, milling and other methods for stone, building materials, refractory materials, For the processing of hard and b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B19/20C22B19/30C22B25/06C22B13/00C01B32/25
CPCC22B7/007C22B13/045C22B15/0067C22B15/0069C22B15/0071C22B19/22C22B19/30C22B25/04C22B25/06Y02P10/20
Inventor 周小纯
Owner 周小纯
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