摘要
针对某铀钼矿尾渣进行了成分分析、粒级筛析及矿物组成研究,开展了不同氧压浸出工艺对比试验。尾渣中可回收的金属为钼和铀,其中钼含量较高,达到了近0.6%,铀含量较低,仅为0.022%。钼主要以辉钼矿/胶硫钼矿形式分布,且绝大部分被石英颗粒包裹,解离程度低,采用加压氧化分解工艺可以改善钼的溶浸效果。通过条件试验分别确定了氧压酸浸、氢氧化钠氧压碱浸、碳酸钠氧压碱浸的最佳工艺条件,钼浸出率分别达到80.76%,85.32%,80.49%,而氧压酸浸和碳酸钠氧浸条件下的铀金属也可以浸出60%。试剂消耗成本测算结果表明,氧压酸浸过程工艺成本最低,综合考虑建议尾渣浸出工艺路线选择氧压酸浸工艺。
The composition analysis,particle size sieve analysis and mineral composition of the tailings of a uranium molybdenum mine were studied,and the comparative tests of different oxygen pressure leaching processes were carried out.The recoverable metals in the tailings are molybdenum and uranium.The content of molybdenum is high,up to nearly 0.6%,and the content of uranium is low,only 0.022%.Molybdenum is mainly distributed in the form of molybdenite/colloidal molybdenite,and most of it is wrapped by quartz particles with low degree of dissociation.The solution effect of molybdenum can be improved by pressurized oxidation decomposition process.The optimum technological conditions of oxygen pressure acid leaching,sodium hydroxide oxygen pressure alkali leaching and sodium carbonate oxygen pressure alkali leaching were determined through the condition test.The leaching rates of molybdenum reached 80.76%,85.32%and 80.49%respectively,and the uranium metal under the conditions of oxygen pressure acid leaching and sodium carbonate oxygen leaching could also be leached by 60%.The calculation results of reagent consumption cost show that the process cost of oxygen pressure acid leaching is the lowest.Considering comprehensively,it is suggested to choose oxygen pressure acid leaching process for tailings leaching process.
作者
任志刚
程瑞泉
刘永涛
高东星
刘辉
Ren Zhigang;Cheng Ruiquan;Liu Yongtao;Gao Dongxing;Liu Hui(Guyuan Uranium Co.,Ltd.,CNNC,Zhangjiakou 076561,China;Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China)
出处
《山东化工》
CAS
2022年第20期154-156,159,共4页
Shandong Chemical Industry
关键词
铀钼矿尾渣
矿物特性
氧压酸浸
氧压碱浸
uranium molybdenum tailings
mineral properties
oxygen pressure acid leaching
oxygen pressure alkali leaching
