硬质合金磨削废料中钨的回收利用研究  

On the Recycling of Grinding Waste of Cemented Carbide

作　　者：郭超[1] 肖连生[1] 刘前明[1] 龚柏凡[1] 

机构地区：[1]中南大学冶金科学与工程学院难冶有色金属资源高效利用国家工程实验室,湖南长沙410083

出　　处：《中国钨业》2010年第6期21-24,共4页China Tungsten Industry

摘　　要：采用氧化焙烧-常压(高压)碱浸和苏打焙烧-常压水浸工艺,对硬质合金磨削废料中WC的焙烧浸出工艺进行了研究。XRD分析氧化焙砂,发现生成了难以分解破坏其结构的Fe(Al,Cu,Ti,Co)O.xSiO.2yWO3的多组分复杂固溶体物相,即使采用高温高压碱浸工艺,钨的浸出率也只有33%左右。苏打焙烧,增加碳酸钠量,提高焙烧温度,均可提高WO3浸出率(最高可达99.35%),降低其渣中含量(最低可至0.2%)。XRD分析可知,苏打焙烧可以抑制Fe(Al,Cu,Ti,Co)O.xSiO.2yWO3固溶体结构的形成。Using oxidizing roast-atmospheric pressure（high pressure） alkaline leaching and sodium roasting-atmospheric water leaching methods,the roasting and leaching process of cemented carbide grinding waste were studied.Results show that an multi-components complex solid solution Fe（Al,Cu,Ti,Co）O·xSiO2·yWO3 was found in the oxidizing roasting sand,which decompostion is very hard to obtain.Even applying the high-temperature high-pressure alkaline leaching process,the leaching rate of tungsten was only 33 %.In the soda roasting process,increasing sodium carbonate amounts and raising calcination temperature can increase the WO3 leaching rates（up to 99.35 %） and reduce its slag contents（lower than 0.2 %）.XRD analysis shows that the soda roasting can inhibit Fe（Al,Cu,Ti,Co）O·xSiO2·yWO3 solid solution formation.

关 键 词：WC 苏打焙烧 常压浸出 硬质合金磨削废料 

分 类 号：TF841.1[冶金工程—有色金属冶金]