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1、doi：10.3969/j.issn.1007-7545.2017.12.003真空冶金法回收WC-Co硬质合金废料的研究夏侯斌，李平，朱红英，邓攀，余音宏，刘宜强(1.国家钨与稀土产品质量监督检验中心，江西赣州341000；2.江西省钨与稀土产品质量监督检验中心，江西赣州341000；3.江西省钨与稀土研究院，江西赣州341000)摘要：通过热力学计算，从理论上分析了1550~2000℃、压力小于1.73Pa的条件下，采用真空冶金法可以从WC-Co硬质合金废料中分离WC硬质相和钴黏结相。随后，以钴
2、含量为3%~15%的WC-Co硬质合金废料为原料进行了钴含量对钴挥发率、纯度以及对WC粉末质量影响的研究。结果表明，钴挥发率随原料钴含量的增大先增大后减小，钴含量为8%时钴挥发率达最大值86.63%；原料钴含量对金属钴的纯度无明显规律性影响，钴含量为12%时金属钴纯度达最大值99.95%。WC粉末的XRD谱显示，当原料钴含量为3%和15%时出现钴衍射峰，有钴残留，原料钴含量为5%、8%及12%时未出现钴衍射峰，各次试验均未出现W2C相，无明显脱碳；WC粉末的SEM形貌显示，粉末呈近球形，表面光滑，粒
3、径为1~8µm。试验制得了合格WC粉末和金属钴。关键词：真空冶金；WC-Co硬质合金废料；碳化钨粉末；金属钴中图分类号：TF841文献标识码：A文章编号：中图分类号：TL212.1+2文献标志码：A文章编号：1007-7545（2017）12-0000-00ResearchforRecyclingWC-CoCementedCarbideScrapsbyVacuumMetallurgyXIAHou-bin,LIPing,ZHUHong-ying,DENGPan,YUYin-hong,LIUYi-qia
4、ng(1.TheNationlTungstenandRare-earthProductQualitySupervisionTestingCenter,Ganzhou341000,Jiangxi,China;2.JiangxiTungstenandRare-earthProductQualitySupervisionTestingCenter,Ganzhou341000,Jiangxi,China;3.JiangxiResearchInstituteofTungstenandRare-Earth,Ga
5、nzhou341000,Jiangxi,China)Abstract：SeparationofhardphaseWCandbinderphaseCofromWC-Cocementedcarbidescrapsbyvacuummetallurgyundertheconditionof1550~2000℃and<1.73Pawastheoreticallyanalyzedbasedonthermodynamiccalculation.WC-Cocementedcarbidescrapswithcobal
6、tcontentof3%~15%wasappliedasrawmaterialtoanalyzerelationshipbetweencobaltcontentandcobaltvolatilizationrate,cobaltpurityrate,andWCpowderquality.Theresultsshowthatcobaltvolatilizationraterisesfirstanddropslaterwithincreaseofcobaltcontentinrawmaterial,an
7、dthemaximumcobaltvolatilizationrateis86.63%uponcobaltcontentrawmaterialis8%.Thereisnoregularrelationshipbetweencobaltcontentandcobaltpurityrate,whencobaltcontentinrawmaterialis12%,cobaltpurityrateisupto99.95%ofthemaximumvalue.AsshownbyXRDspectrumofWCpo
8、wder,Codiffractionpeakappearsuponcobaltcontentinrawmaterialof3%and15%,andcobaltdoesnotvolatilecompletely;whileCodiffractionpeakdoesnotappearuponcobaltcontentinrawmaterialof5%,8%and12%.W2Cphasedoesnotappearinallexperiments,nosignificantd
