都龙复杂铁闪锌矿工艺矿物学及浮选试验研究

发布时间：2018-03-04 01:25

本文选题：铁闪锌矿　切入点：浮选　出处：《昆明理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：锌是一种重要的有色金属,在国民经济建设中有着不可替代的重要作用。我国铅锌资源储量非常丰富,是全世界铅锌储量最多的国家之一。我国很多多金属铅锌矿床都不同程度地含有铁闪锌矿,且分布广泛,已成为我国重要的锌资源。面对日益减少的锌资源,开展铁闪锌矿资源的综合利用研究,对弥补锌矿资源的枯竭和提高资源的综合利用率都具有十分重要的意义。本文以都龙多金属铁闪锌矿为研究对象,通过化学多元素分析、显微镜观察、单矿物化学成分能谱分析、MLA矿物自动定量检测技术等测试手段对该矿石进行了较为详细的工艺矿物学研究,并在此基础上,进行了实际矿石的选矿试验研究。通过不同药剂制度和工艺条件下矿物的可浮性差异及选别指标的优化,确定较为经济合理的铁闪锌矿综合回收利用的技术方案,为都龙铁闪锌矿资源的合理开发提供重要的技术参考。闪锌矿化学能谱分析结果表明,闪锌矿中含铁12.04%,为含铁闪锌矿。原矿多元素分析结果表明,矿石中锌的含量较高,为4.47%。物相分析结果表明,矿石中锌主要以硫化锌的形式存在,氧化率很低,硫化锌形式存在的锌占有率高达95.97%。矿物结晶粒度测定结果表明,矿石中主要矿物的结晶粒度都偏细,-0.16+0.04mm粒级的分布率超过一半。扫描电镜结果表明,闪锌矿中不仅包含微细粒黄铁矿、黄铜矿、自然铋等矿物,还与磁黄铁矿、黄铜矿等连生。通过实际矿石的浮选试验,研究了铁闪锌矿pH调整剂、抑制剂、捕收剂以及活化剂用量等参数对浮选的影响,确定了铁闪锌矿最佳的浮选药剂制度,即铁闪锌矿抑制剂硫酸锌和亚硫酸钠用量均为600g/t,黄铜矿捕收剂乙黄用量为30g/t,铁闪锌矿活化剂XYS-1用量为160g/t,铁闪锌矿捕收剂丁黄用量为140g/t。通过一次粗选、两次精选、两次扫选的浮选闭路试验,获得了锌品位为48.80%,回收率为90.30%的锌精矿。本文采用的是以工艺矿物学为主、实际矿石的浮选试验相结合的研究方式,从理论和实际两个方面,研究出了一条对铁闪锌矿进行高效回收利用的技术路线,工艺矿物学研究和实际矿石的浮选试验互相验证,使得铁闪锌矿的浮选试验更加具有可行性,对进一步提高都龙铁闪锌矿资源的开发利用效率具有十分重要的意义。
[Abstract]:Zinc is an important nonferrous metal, which plays an irreplaceable role in national economic construction. It is one of the most abundant lead and zinc deposits in the world. Many polymetallic lead-zinc deposits in China contain sphalerite to varying degrees and are widely distributed, which has become an important zinc resource in China. It is of great significance to study the comprehensive utilization of sphalerite resources in order to make up for the depletion of zinc ore resources and to improve the comprehensive utilization rate of the resources. In this paper, Dulong polymetallic sphalerite is taken as the research object, and the chemical multielement analysis is carried out. Microscopic observation, single mineral chemical component energy spectrum analysis and MLA mineral automatic quantitative detection were used to study the ore's process mineralogy in detail. The experimental study on mineral processing of actual ore is carried out. Through the difference of floatability of minerals and optimization of separation indexes under different reagent systems and technological conditions, the technical scheme of comprehensive recovery and utilization of sphalerite is determined, which is more economical and reasonable. This paper provides an important technical reference for the rational exploitation of Dulong iron sphalerite resources. The results of chemical energy spectrum analysis of sphalerite indicate that the sphalerite contains 12.04 iron, which is a sphalerite containing iron. The results of multielement analysis of the ore indicate that the zinc content in the ore is high. The results of phase analysis show that zinc in the ore mainly exists in the form of zinc sulfide, and the oxidation rate is very low. The share of zinc in the form of zinc sulfide is up to 95.97. The results of SEM show that the sphalerite contains not only fine pyrite, chalcopyrite, natural bismuth and other minerals, but also pyrrhotite. The effect of pH adjuster, depressant, collector and activator dosage on the flotation of chalcopyrite was studied by the flotation test of the actual ore. The best flotation reagent system of the sphalerite was determined. That is, the amount of zinc sulfate and sodium sulfite is 600 g / t, the amount of chalcopyrite collector is 30 g / t, the amount of XYS-1 is 160 g / t, the amount of butadiene is 140 g / t. The flotation closed circuit test of twice cleaning has obtained the zinc concentrate with a zinc grade of 48.80 and a recovery of 90.30%. In this paper, a research method of combining the flotation test of practical ore with process mineralogy is adopted, from both theoretical and practical aspects. A technical route for high efficiency recovery and utilization of sphalerite has been developed. The technological mineralogical study and the flotation test of the actual ore have verified each other, which makes the flotation test of marmatite more feasible. It is of great significance to further improve the development and utilization efficiency of Dulong iron sphalerite resources.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD952;TD923

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