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  本文選題：銅鉬分離　切入點：黃銅礦、輝鉬礦　出處：《江西理工大學(xué)》2017年碩士論文

【摘要】：銅鉬分離一直以來就是礦物加工領(lǐng)域的難題,是制約銅鉬共生資源開發(fā)的較大障礙,因而成為選礦工作者研究的重點。本文以江西某難選銅鉬礦為研究對象,開展了一些基礎(chǔ)研究,以期研發(fā)出銅鉬分離的新型高效抑制劑,從而為后續(xù)研究工作提供某些參考。實際銅鉬礦工藝礦物學(xué)研究表明,該銅鉬共生礦石中主要有用礦物為黃銅礦和輝鉬礦,銅、鉬品位分別為0.844%和0.234%,脈石礦物主要為石英和云母等硅酸鹽礦物。因輝鉬礦賦存狀態(tài)復(fù)雜,或吸附于其它礦物表面,或被其它礦物包裹,或星散分布于脈石礦物中,從而難以單體解離,加之輝鉬礦硬度較低,磨礦控制困難,是導(dǎo)致該銅鉬礦難以分離的關(guān)鍵因素。通過實際銅鉬礦混合浮選試驗研究,確定了銅鉬混合浮選試驗最佳條件參數(shù):磨礦細(xì)度為-0.074mm占70%,捕收劑煤油和丁基黃藥的用量分別為150g/t和50g/t,石灰及水玻璃的用量分別為500g/t和1200g/t;通過銅鉬混合精礦浮選分離試驗研究,確定銅鉬粗選分離的最佳條件參數(shù)為煤油用量100g/t,脈石礦物抑制劑水玻璃用量為100g/t,黃銅礦抑制劑FSL用量為200g/t,起泡劑用量為20g/t,礦漿濃度為30%,浮選時間為6min,銅鉬混合精礦先選后磨;通過銅鉬混合精礦浮選分離黃銅礦抑制劑種類及用量試驗可知,各抑制劑對黃銅礦抑制能力的相對大小順序為FSL硫化鈉巰基乙酸鈉殼聚糖海藻酸鈉,并且將FSL成功應(yīng)用于實際浮選工藝流程,實現(xiàn)了銅鉬有效分離。純礦物浮選試驗研究:通過黃銅礦和輝鉬礦純礦物浮選試驗研究,充分了解和掌握了相關(guān)藥劑的浮選性能,結(jié)果表明丁基黃藥和煤油分別為黃銅礦、輝鉬礦的優(yōu)勢捕收劑,且捕收性能較強;同時,不同抑制劑體系下黃銅礦、輝鉬礦浮選行為的研究證明新型抑制劑FSL對黃銅礦具有較高的抑制選擇性,人工混合礦模擬試驗結(jié)果同樣也證明抑制劑FSL對銅鉬能夠進(jìn)行有效分離,與實際銅鉬礦的浮選試驗結(jié)果相吻合。FSL作用機理分析:通過借助吸附量和接觸角測試儀對新型抑制劑FSL與礦物的作用機理進(jìn)行分析研究,發(fā)現(xiàn)抑制劑FSL可與黃銅礦表面發(fā)生作用而使其受到抑制,但FSL基本不對輝鉬礦產(chǎn)生抑制作用;同時,受抑制劑FSL作用后的黃銅礦因親水性增強而難以被捕收劑丁基黃藥繼續(xù)捕收,且受丁基黃藥作用后的黃銅礦對FSL的消耗量將明顯增加,表明抑制劑FSL通過與黃銅礦表面發(fā)生了某種特殊作用而使其受到了選擇性抑制。
[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.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD923.14;TD95

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本文編號：1677665