金堆城钼精矿浮选提纯试验研究

发布时间：2019-07-04 08:41

【摘要】：钼是一种珍贵的高熔点金属,是重要的战略性物资。近年来,对高品质钼精矿(含Mo高于57%)的需求持续增加,生产高品质钼精矿是钼矿山企业实现可持续发展的一条新途径。而针对钼精矿浮选提纯的研究较少,通过浮选方法提纯仍然是一个难点。本论文首先对辉钼矿、黄铜矿、方铅矿三种纯矿物在不同浮选环境下的行为展开研究,在此基础上,对实际矿物进行了系统的研究。对原矿进行化学多元素分析、XRD衍射分析及粒度分析,结果表明,原矿中主要有价矿物为辉钼矿,主要脉石矿物有石英、云母、长石、方解石、黄铁矿,其次还有少量的高岭石、黄铜矿、方铅矿等;钼、铜、铅主要分布在0.025mm-0.074mm粒级,分布规律并无很大差异。-0.025mm粒级中,钼相对其他两种矿物,含量较低,且品位也较低。单矿物试验研究表明,煤油作用体系下辉钼矿的回收率要高于YC作用体系,煤油和YC对黄铜矿、方铅矿的捕收性能均较差,煤油作用体系下辉钼矿浮选的适宜pH为6左右。三种纯矿物基本不随着水玻璃和六偏磷酸钠用量的增加发生变化,其他三种调整剂中,巯基乙酸钠对黄铜矿的抑制效果最好,磷诺克斯对方铅矿抑制效果最好,而STLM对方铅矿抑制效果较好,但对辉钼矿也有一定的抑制作用。对实际矿物进行了系统的实验室浮选试验研究,确定粗选的浮选条件为:再磨细度为-0.038mm含量70%,不加捕收剂、起泡剂及NaOH,六偏磷酸钠用量1000g/t,巯基乙酸钠用量2500g/t,磷诺克斯用量3000g/t。经过一粗四精的开路流程,得到的钼精矿品位57.74%,回收率58.86%,Mo、Cu和Pb含量均达到了高纯钼精矿的标准。开展了实际矿物半工业浮选柱试验,在处理量0.2t/h,循环压力0.24MPa,六偏磷酸钠用量5040g/t,巯基乙酸钠用量3960g/t,磷诺克斯用量6750g/t的条件下,经过浮选柱“一粗二精”闭路分选,获得Mo品位为57.71%,Cu品位为0.033%,Pb品位为0.039%,Mo回收率为57.54%的钼精矿产品。
[Abstract]:Mo is a precious high melting point metal and an important strategic material. In recent years, the demand for high quality Mo concentrate (containing more than 57% Mo) has been increasing continuously. The production of high quality Mo concentrate is a new way to realize the sustainable development of Mo mining enterprises. However, there is little research on flotation purification of Mo concentrate, and it is still a difficult point to purify Mo concentrate by flotation method. In this paper, the behavior of three pure minerals, molybdate, chalcopyrite and galena, in different flotation environments is studied. On this basis, the actual minerals are systematically studied. The chemical multi-element analysis, XRD diffraction analysis and particle size analysis of the original ore show that the main valuable minerals in the original ore are molybdate, quartz, mica, feldspar, calcite, pyrite, followed by a small amount of kaolinite, chalcopyrite, galena and so on. Mo, copper and lead are mainly distributed in 0.025mm-0.074mm grain size, and the distribution law is not very different. In 0.025mm grain size, the content of Mo is lower and the grade is lower than that of the other two minerals. The experimental results of single mineral show that the recovery rate of molybdate in kerosene system is higher than that in YC action system. The collection performance of kerosene and YC for chalcopyrite and galena is poor. The suitable pH for molybdate flotation under kerosene action system is about 6. The three pure minerals basically did not change with the increase of water glass and sodium hexametaphosphate. Among the other three regulators, sodium mercaptoacetate had the best inhibitory effect on chalcopyrite, phosphorus Knox had the best inhibitory effect on lead ore, while STLM had better inhibitory effect on lead ore, but it also had a certain inhibitory effect on molybdate. A systematic laboratory flotation test was carried out on practical minerals. The flotation conditions were determined as follows: regrinding fineness of-0.038mm content 70%, no collector, foaming agent and NaOH, sodium hexametaphosphate dosage 1000g / t, sodium mercaptoacetate 2500g / t, phosphate Knox dosage 3000g / t. The grade of Mo concentrate is 57.74% and the recovery rate is 58.86%. The contents of Cu and Pb in Mo are up to the standard of high purity Mo concentrate. The results show that the content of Mo is 57.74% and the recovery rate is 58.86%. The content of Mo and Mo is up to the standard of high purity Mo concentrate. The semi-industrial flotation column test of minerals was carried out. Under the conditions of treatment capacity 0.2 t 路h, circulation pressure 0.24 MPA, sodium hexametaphosphate 5040 g / t, sodium mercaptoacetate 3960 g / t, phosphorus Knox dosage 6750g/t, the Mo grade was 57.71%, the copper grade was 0.033%, the Pb grade was 0.039%, and the Mo recovery rate was 57.54%.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD954

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