硫化铜钼矿的新型抑制剂及其机理研究

发布时间：2018-03-28 19:10

本文选题：铜钼分离　切入点：黄铜矿、辉钼矿　出处：《江西理工大学》2017年硕士论文

【摘要】：铜钼分离一直以来就是矿物加工领域的难题,是制约铜钼共生资源开发的较大障碍,因而成为选矿工作者研究的重点。本文以江西某难选铜钼矿为研究对象,开展了一些基础研究,以期研发出铜钼分离的新型高效抑制剂,从而为后续研究工作提供某些参考。实际铜钼矿工艺矿物学研究表明,该铜钼共生矿石中主要有用矿物为黄铜矿和辉钼矿,铜、钼品位分别为0.844%和0.234%,脉石矿物主要为石英和云母等硅酸盐矿物。因辉钼矿赋存状态复杂,或吸附于其它矿物表面,或被其它矿物包裹,或星散分布于脉石矿物中,从而难以单体解离,加之辉钼矿硬度较低,磨矿控制困难,是导致该铜钼矿难以分离的关键因素。通过实际铜钼矿混合浮选试验研究,确定了铜钼混合浮选试验最佳条件参数:磨矿细度为-0.074mm占70%,捕收剂煤油和丁基黄药的用量分别为150g/t和50g/t,石灰及水玻璃的用量分别为500g/t和1200g/t;通过铜钼混合精矿浮选分离试验研究,确定铜钼粗选分离的最佳条件参数为煤油用量100g/t,脉石矿物抑制剂水玻璃用量为100g/t,黄铜矿抑制剂FSL用量为200g/t,起泡剂用量为20g/t,矿浆浓度为30%,浮选时间为6min,铜钼混合精矿先选后磨;通过铜钼混合精矿浮选分离黄铜矿抑制剂种类及用量试验可知,各抑制剂对黄铜矿抑制能力的相对大小顺序为FSL硫化钠巯基乙酸钠壳聚糖海藻酸钠,并且将FSL成功应用于实际浮选工艺流程,实现了铜钼有效分离。纯矿物浮选试验研究:通过黄铜矿和辉钼矿纯矿物浮选试验研究,充分了解和掌握了相关药剂的浮选性能,结果表明丁基黄药和煤油分别为黄铜矿、辉钼矿的优势捕收剂,且捕收性能较强;同时,不同抑制剂体系下黄铜矿、辉钼矿浮选行为的研究证明新型抑制剂FSL对黄铜矿具有较高的抑制选择性,人工混合矿模拟试验结果同样也证明抑制剂FSL对铜钼能够进行有效分离,与实际铜钼矿的浮选试验结果相吻合。FSL作用机理分析:通过借助吸附量和接触角测试仪对新型抑制剂FSL与矿物的作用机理进行分析研究,发现抑制剂FSL可与黄铜矿表面发生作用而使其受到抑制,但FSL基本不对辉钼矿产生抑制作用;同时,受抑制剂FSL作用后的黄铜矿因亲水性增强而难以被捕收剂丁基黄药继续捕收,且受丁基黄药作用后的黄铜矿对FSL的消耗量将明显增加,表明抑制剂FSL通过与黄铜矿表面发生了某种特殊作用而使其受到了选择性抑制。
[Abstract]:The separation of copper and molybdenum has always been a difficult problem in the field of mineral processing, which is a great obstacle to the development of copper-molybdenum symbiotic resources. Some basic studies have been carried out with a view to developing new efficient inhibitors for the separation of copper and molybdenum, which will provide some references for further study. The main useful minerals in the copper-molybdenum symbiotic ore are chalcopyrite and molybdenum. The grade of copper and molybdenum are 0.844% and 0.234%, respectively. The gangue minerals are mainly silicate minerals such as quartz and mica. Or wrapped in other minerals, or scattered in gangue minerals, it is difficult to dissociate monomers, in addition to molybdenum hardness is lower, grinding control is difficult, It is the key factor that the copper-molybdenum ore is difficult to separate. The optimum conditions were determined as follows: the grinding fineness is -0.074 mm, the amount of collector kerosene and Ding Ji xanthate is 150g/t and 50 g / t, the dosage of lime and water glass is 500g/t and 1200g / t respectively. The optimum conditions were determined as follows: kerosene 100g / t, gangue mineral depressant water glass 100g / t, chalcopyrite inhibitor FSL 200g / t, foaming agent 20g / t, slurry concentration 30g / t, flotation time 6min. By flotation separation of chalcopyrite depressants from mixed copper and molybdenum concentrate, the results show that the relative order of inhibition ability of each depressant to chalcopyrite is FSL sodium sulphide, sodium thioglycolate, sodium chitosan, alginate, sodium alginate. FSL has been successfully applied to the actual flotation process and the effective separation of copper and molybdenum has been realized. The flotation performance of chalcopyrite and molybdenum has been fully understood and mastered through the flotation experiments of chalcopyrite and molybdenum. The results show that Ding Ji xanthate and kerosene are superior collector of chalcopyrite and molybdenum, respectively, and have strong collecting performance. The study of flotation behavior of molybdenum shows that the new depressant FSL has high inhibition selectivity to chalcopyrite, and the simulated results of artificial mixed ore also prove that the depressant FSL can effectively separate copper and molybdenum from chalcopyrite. The action mechanism of the new depressant FSL was studied by means of adsorption quantity and contact angle tester, which coincided with the flotation test results of the actual copper-molybdenum ore, and the mechanism of the interaction between the new depressant FSL and the mineral was studied by means of adsorption quantity and contact angle tester. It was found that the inhibitor FSL could act on the surface of chalcopyrite and inhibit it, but FSL had little inhibitory effect on molybdenum, and at the same time, The chalcopyrite treated with inhibitor FSL is difficult to be collected by the collector Ding Ji xanthate because of its hydrophilic enhancement, and the consumption of chalcopyrite after the action of Ding Ji xanthate will increase obviously. It is shown that the inhibitor FSL is selectively inhibited by a special interaction with chalcopyrite surface.
【学位授予单位】：江西理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD923.14;TD95

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