CN103663452A - Method for recovering tungsten carbide from waste hard alloy - Google Patents
Method for recovering tungsten carbide from waste hard alloy Download PDFInfo
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- CN103663452A CN103663452A CN201310666098.XA CN201310666098A CN103663452A CN 103663452 A CN103663452 A CN 103663452A CN 201310666098 A CN201310666098 A CN 201310666098A CN 103663452 A CN103663452 A CN 103663452A
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- tungsten carbide
- hard alloy
- alloy
- waste hard
- cobalt
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention provides a method for recovering tungsten carbide from a waste hard alloy. The method specifically comprises the following processing steps: 1. abrasive cleaning: removing impurities on the surface of the waste hard alloy through abrasive cleaning; 2. sintering: putting the waste hard alloy and a zinc slab in a weight ratio of 1:(1-2) into a sintering furnace, controlling the temperature at 850-1050 DEG C, and smelting the materials for 30 hours, wherein in the process, the low-melting-point impurities such as cobalt, nickel, iron and the like in the hard alloy can form an alloy solution with zinc while tungsten carbide is still massive due to high melting point; 3. vacuum distillation: separating the alloy solution formed in the process from massive tungsten carbide; 4. grinding: grinding massive tungsten carbide into fine powder; 5. sieving: sieving in different modes according to different requirements to obtain tungsten carbide powder with different diameters of particles. The contents of the impurities such as cobalt, nickel, iron and the like in recovered tungsten carbide can be controlled within 0.07%, so that tungsten carbide absolutely approaches to the standards of primary tungsten carbide, and the production cost is low.
Description
Technical field
The present invention relates to alloy manufacturing technology field, relate in particular to a kind of from scrap hard alloy the method for recovered WC.
Background technology
That Wimet has is high temperature resistant, anti-oxidant, high rigidity and high-wearing feature, be widely used in the industries such as machinofacture, mining and medical electronics, and the main raw that forms Wimet is wolfram varbide, tungsten is a kind of rare metal, and along with being on the increase of various tungsten products, produced quantity constantly increases, ecosystem tungsten resource mineral deposits are day by day exhausted, therefore, from scrap hard alloy, carry out the recovery of wolfram varbide, have very important meaning.At present, from scrap hard alloy, the method for recovered WC has two kinds, is respectively electrochemical method and mechanical crushing method.Electrochemical method need to adopt a large amount of chemical feedstockss, consumes a large amount of electric energy simultaneously, not only can cause environmental pollution, and cost recovery is high; Mechanical crushing method is to adopt treatment process artificial and that Mechanical Crushing combines, and the wolfram varbide that the method obtains is not only difficult to meet the requirements of fineness, but also contains a large amount of impurity.
Summary of the invention
Object of the present invention be exactly for above-mentioned situation provide a kind of from scrap hard alloy the method for recovered WC, not only purity is high for the wolfram varbide that the method reclaims, and cost is low.Object of the present invention can realize by following scheme: a kind of from scrap hard alloy the method for recovered WC, its concrete technology step is as follows: 1, wear away: by wearing away the impurity of removing surface in scrap hard alloy; 2, sintering: by scrap hard alloy and spelter by weight the ratio of 1:1 ~ 2 put into sintering oven, temperature is controlled at 850 ~ 1050 degree, melting 30 hours, the impurity of the low melting points such as the cobalt in this process in Wimet, nickel, iron can form alloy solution with zinc, and wolfram varbide is because fusing point is high, still keep block; 3, vacuum distilling: this process is used for the alloy solution forming in said process to carry out separated with tungsten carbide slug; 4, abrasive dust: tungsten carbide slug is milled into fine powder; 5, sieve: according to different requirements, through different sieving, can get the tungsten carbide powder of different diameter particle.In the wolfram varbide that the present invention reclaims, the foreign matter content such as cobalt, nickel, iron can be controlled in 0.07%, approach the standard of primary wolfram varbide completely, and production cost is low.
Claims (1)
1. a method for recovered WC from scrap hard alloy, its concrete technology step is as follows: wear away (1): by wearing away the impurity of removing surface in scrap hard alloy; (2) sintering: by scrap hard alloy and spelter by weight the ratio of 1:1 ~ 2 put into sintering oven, temperature is controlled at 850 ~ 1050 degree, melting 30 hours, the impurity of the low melting points such as the cobalt in this process in Wimet, nickel, iron can form alloy solution with zinc, and wolfram varbide is because fusing point is high, still keep block; (3) vacuum distilling: this process is used for the alloy solution forming in said process to carry out separated with tungsten carbide slug; (4) abrasive dust: tungsten carbide slug is milled into fine powder; (5) sieve: according to different requirements, through different sieving, can get the tungsten carbide powder of different diameter particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310666098.XA CN103663452A (en) | 2013-12-11 | 2013-12-11 | Method for recovering tungsten carbide from waste hard alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310666098.XA CN103663452A (en) | 2013-12-11 | 2013-12-11 | Method for recovering tungsten carbide from waste hard alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103663452A true CN103663452A (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310666098.XA Pending CN103663452A (en) | 2013-12-11 | 2013-12-11 | Method for recovering tungsten carbide from waste hard alloy |
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| CN (1) | CN103663452A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145114B (en) * | 2016-06-28 | 2018-03-27 | 赣州市华新金属材料有限公司 | A kind of method of useless tungsten-cobalt hard alloy recovered WC and metallic cobalt |
| CN108314049A (en) * | 2017-01-16 | 2018-07-24 | 自贡市华刚硬质合金新材料有限公司 | Alloy vacuum powder production technology |
| CN108977664A (en) * | 2018-07-24 | 2018-12-11 | 中南大学 | The method for recycling tungsten carbide and cobalt in scrap hard alloy |
| CN111778400A (en) * | 2020-01-06 | 2020-10-16 | 中南大学 | Method for recovering tungsten carbide and cobalt in waste hard alloy through melt extraction separation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06182134A (en) * | 1992-12-24 | 1994-07-05 | Matsushita Electric Works Ltd | Carbon dioxide concentrator |
| CN102399620A (en) * | 2011-10-08 | 2012-04-04 | 江苏佳宇资源利用股份有限公司 | Method for recovering silicon carbide component from crystal silicon cutting waste mortar |
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2013
- 2013-12-11 CN CN201310666098.XA patent/CN103663452A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06182134A (en) * | 1992-12-24 | 1994-07-05 | Matsushita Electric Works Ltd | Carbon dioxide concentrator |
| CN102399620A (en) * | 2011-10-08 | 2012-04-04 | 江苏佳宇资源利用股份有限公司 | Method for recovering silicon carbide component from crystal silicon cutting waste mortar |
Non-Patent Citations (1)
| Title |
|---|
| 赵万军: "再生硬质合金性能提高及工艺优化研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》, vol. 02262, no. 03, 15 March 2012 (2012-03-15) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145114B (en) * | 2016-06-28 | 2018-03-27 | 赣州市华新金属材料有限公司 | A kind of method of useless tungsten-cobalt hard alloy recovered WC and metallic cobalt |
| CN108314049A (en) * | 2017-01-16 | 2018-07-24 | 自贡市华刚硬质合金新材料有限公司 | Alloy vacuum powder production technology |
| CN108977664A (en) * | 2018-07-24 | 2018-12-11 | 中南大学 | The method for recycling tungsten carbide and cobalt in scrap hard alloy |
| CN108977664B (en) * | 2018-07-24 | 2019-10-29 | 中南大学 | The method for recycling tungsten carbide and cobalt in scrap hard alloy |
| CN111778400A (en) * | 2020-01-06 | 2020-10-16 | 中南大学 | Method for recovering tungsten carbide and cobalt in waste hard alloy through melt extraction separation |
| CN111778400B (en) * | 2020-01-06 | 2022-05-27 | 中南大学 | Method for recovering tungsten carbide and cobalt in waste hard alloy through melt extraction separation |
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Application publication date: 20140326 |