桂林高碳氧硫混合型铅锌矿选矿试验研究

发布时间：2018-02-24 12:12

本文关键词： 高碳高泥氧硫混合铅锌矿脱炭优先浮选　出处：《昆明理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着国民经济的发展,硫化矿资源不断被开发与消耗,氧化铅锌矿和氧硫混合铅锌矿的高效开发与利用已经成为保障我国铅锌需求量的重要途径。试验矿石取自桂林铅锌矿床,属典型的高碳氧硫混合型铅锌矿石。矿石结构和构造复杂,矿物嵌布粒度细,且原矿含碳量和含泥量均高,矿石选别难度极大。本文以该矿石为研究对象,针对矿石高碳、高泥和氧硫混合的特点,探索其选矿工艺流程及药剂制度,对解决相同类型铅锌矿石的选别具有一定的指导意义。原矿中主要有用元素为铅、锌和伴生元素银,其中Pb品位3.62%,氧化率高达74.86%,铅矿物主要包括铅矾、方铅矿和白铅矿；Zn品位8.20%,锌矿物主要包括闪锌矿、菱锌矿、异极矿和锌铁尖晶石,硫化锌占73.99%；伴生元素Ag品位84.13g/t,银主要赋存于方铅矿中,其它元素暂无回收价值。脉石矿物主要为石英、硅酸盐矿物及钙镁碳酸盐矿物。原矿含碳量高达6.75%,含泥量高达32.25%,这些都对选别作业带来了很大影响。在工艺矿物学研究的基础上,论文对矿石的选别流程进行了探索试验,确定了“预先脱炭-硫化铅-硫化锌-氧化铅”的优先浮选原则流程。在此基础上,进行了条件试验研究,确定了最佳药剂制度；经开路流程后,确定了各阶段精、扫选次数：两次粗选脱炭、硫化铅采用一粗三精两扫流程、硫化锌采用一粗两精两扫流程、氧化铅采用一粗三精两扫流程。闭路试验流程最终获得三个产品,其中硫化铅精矿中Pb品位为23.46%,回收率为27.40%,含Ag946.51g/t,回收率为45.13%；硫化锌精矿中Zn品位为46.97%,回收率为69.44%,含Agl73.82g/t,回收率为24.86%；氧化铅精矿中Pb品位为24.11%,回收率为45.34%,含Ag148.19g/t,回收率为11.37%,硫化铅和氧化铅精矿总回收率为72.74%。获得了较好的选别指标。
[Abstract]:With the development of national economy, sulphide ore resources have been continuously developed and consumed. The efficient development and utilization of lead-zinc oxide ore and mixed lead-zinc ore has become an important way to ensure the demand of lead and zinc in China. The experimental ore is taken from Guilin lead-zinc deposit. The ore is a typical lead-zinc ore with high carbon, oxygen and sulfur. The ore structure and structure are complicated, the mineral size is fine, and the carbon content and mud content of the ore are high, so it is very difficult to separate the ore. This paper takes the ore as the research object, and aims at the high carbon content of the ore. The characteristics of mixture of high mud and oxygen and sulfur, and exploration of the processing process and reagent system of the ore are of certain guiding significance for the separation of the same type of lead-zinc ore. The main useful elements in the ore are lead, zinc and associated element silver, the main useful elements in the raw ore are lead, zinc and associated elements silver. The grade of Pb is 3.62%, the oxidation rate is up to 74.86, the lead minerals mainly include lead alum, galena and white lead ore, zinc mineral mainly includes sphalerite, smithsonite, heteropolar ore and zinc-ferric spinel, zinc mineral mainly includes sphalerite, smithsonite, heteropolarite and zinc-ferric spinel. Zinc sulphide accounts for 73.99%, Ag grade of associated element is 84.13 g / t, silver mainly occurs in galena, other elements have no recovery value for the time being, gangue minerals are mainly quartz, Silicate minerals and calcium magnesium carbonate minerals. The primary ore contains as much as 6.75 carbon and 32.25 mud, all of which have a great influence on the separation operation. On the basis of the study of process mineralogy, the paper makes an exploratory experiment on the separation process of ore. The preferential flotation principle flow of "advance decarbonization, lead sulphide, zinc sulphide and lead oxide" was determined. Cleaning times: twice rough separation of carbon, lead sulphide using one coarse three fine two sweep process, zinc sulfide using one coarse two fine two sweep process, lead oxide using one coarse three fine two sweep process. Closed circuit test process to obtain three products, The Pb grade of lead sulfide concentrate is 23.46, the recovery rate is 27.400.The content of Ag946.51g / t is 45.131g / t; the zinc sulfide concentrate has 46.97 zinc grade and 69.44g / t Agl73.82g / r = 24.86; the lead oxide concentrate has 24.11Pb grade and 45.34g / t Ag148.19g / t, and the recovery is 24.86g / t, with a recovery of 45.34g / t and a recovery of 45.34g / t with a recovery of 45.34g / t, with a recovery of 69.44g / t and an Agl73.82g / r / t, respectively. The total recovery rate of lead sulfide and lead oxide concentrate is 72.74.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD952

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