【摘要】：銅鋅硫化礦難分離的主要困難在于銅鋅分選時(shí)閃鋅礦容易被銅離子或礦石中存在的磁黃鐵礦等活化,被活化了的閃鋅礦與黃銅礦具有相似的可浮性,從而使銅鋅難以實(shí)現(xiàn)分離,尤其是當(dāng)?shù)V石中還含有磁黃鐵礦的時(shí)候,在銅離子活化閃鋅礦的基礎(chǔ)上,又加入了亞鐵離子和鐵離子的影響,使其更難實(shí)現(xiàn)銅鋅的分離,且磁黃鐵礦分子式為Fe1-xS,X=0.1～0.2,由于x的不確定使其很難通過控制pH值來對其進(jìn)行抑制。某銅鋅硫化礦隨著開采向深部延伸,地質(zhì)條件發(fā)生變化,礦石中出現(xiàn)了大量的磁黃鐵礦,且礦物共生關(guān)系變得更為復(fù)雜。選礦廠按原有銅、鋅依次浮選工藝組織生產(chǎn),選銅時(shí)由于磁黃鐵礦的干擾和磨礦細(xì)度不足而導(dǎo)致銅鋅分離效果不佳,選鋅時(shí)則由于流程結(jié)構(gòu)不盡合理而導(dǎo)致鋅回收率較低。本文針對這些問題開展選礦工藝流程優(yōu)化研究,在選銅前先通過1次磁選將磁黃鐵礦脫除并將入選細(xì)度由-0.074 mm占70%提高到-0.074 mm占80%,在選鋅時(shí)增加1次掃選、1次精選和1次精掃選,最終獲得了銅品位為21.68%、鋅含量為0.62%、銅回收率為93.14%的銅精礦和鋅品位為48.87%、鋅回收率為74.92%的鋅精礦。與模擬現(xiàn)場工藝流程所獲閉路試驗(yàn)指標(biāo)相比,優(yōu)化后工藝流程所獲銅精礦的銅品位和銅回收率分別提高了0.70%和1.45%、鋅含量降低了2.83%,所獲鋅精礦的鋅回收率提高了3.67%,優(yōu)化效果明顯。
[Abstract]:The main difficulty in the separation of copper and zinc sulphide ore is that the sphalerite is easily activated by copper ions or pyrrhotite, and the activated sphalerite has similar floatability to chalcopyrite, which makes it difficult to separate copper and zinc. Especially when there is pyrrhotite in the ore, on the basis of the activation of sphalerite by copper ion, the influence of ferrous ion and iron ion is added, which makes it more difficult to separate copper and zinc. The molecular formula of pyrrhotite is Fe1-xS,X=0.1~0.2, which is difficult to suppress by controlling pH value due to the uncertainty of x. With the development of copper and zinc sulfide ore, the geological conditions change and a large number of pyrrhotite occurs in the ore, and the mineral symbiotic relationship becomes more complicated. The separation effect of copper and zinc is not good due to the interference of pyrrhotite and the lack of grinding fineness, and the recovery rate of zinc is low due to the unreasonable flow structure. Aiming at these problems, this paper studies the optimization of mineral processing process. Before copper is selected, pyrrhotite is removed by one magnetic separation, and the fineness is increased from-0.074 mm to -0.074 mm from 70% to-0.074 mm. In zinc selection, one sweep, one cleaning and one fine cleaning are added. Finally, the copper grade is 21.68, the zinc content is 0.62, the copper concentrate is 93.14%, the zinc grade is 48.87, and the zinc recovery is 74.92%. Compared with the closed circuit test index obtained by simulated field technological process, the copper grade and copper recovery rate of copper concentrate obtained by optimized technological process increased by 0.70% and 1.45% respectively, the zinc content decreased by 2.83%, the zinc recovery rate of zinc concentrate obtained increased 3.67%, and the optimization effect was obvious.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD952

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