保山氧化铅锌矿的选矿试验研究

发布时间：2018-05-29 16:22

本文选题：铅锌矿 + 高氧化率　；参考：《昆明理工大学》2017年硕士论文

【摘要】：我国氧化铅锌矿储量丰富,合理地开发利用这些矿产资源对我国国民经济的发展具有重要意义。本论文以保山氧化铅锌矿为研究对象,该矿石结构复杂,嵌布粒度较细,含泥量较大,属于难选氧化铅锌矿,针对矿石这些特点,进行了一系列试验,取得了良好的试验效果,为相同类型氧化铅锌矿的选别提供一定的指导意义。在实际矿物选矿试验的基础上,进行了单矿物试验,对相关作用机理进行了初步探索。工艺矿物学研究表明,原矿中有用元素是铅和锌,其中铅品位3.04%,氧化率66.45%;锌品位7.89%,氧化率高达85.68%,矿石属于高氧化率氧硫混合难选铅锌矿。矿石中主要有碳酸盐、硫酸盐、氧化物、硫化物和硅酸盐共五类15种矿物,其中铅的有用矿物主要有方铅矿、白铅矿、铅矾和铅铁矾等,锌的有用矿物主要有菱锌矿、异极矿和闪锌矿等,脉石矿物主要是白云石等。在工艺矿物学研究的基础上,进行原则流程探索试验,确定了“硫化铅—硫化锌—氧化铅—氧化锌”依次优先浮选流程;进行浮选条件试验研究,确定了最佳的浮选药剂制度;进行开路试验,确定了各阶段精选次数和扫选次数;最终确定闭路流程为:硫化铅浮选采用一次粗选、三次精选、两次扫选的流程;硫化锌浮选采用一次粗选、两次精选、两次扫选的流程;氧化铅浮选采用一次粗选、两次精选、两次扫选的流程;氧化锌浮选采用一次粗选、两次精选、两次扫选的流程。闭路试验最终得到四个产品:硫化铅精矿、硫化锌精矿、氧化铅精矿和氧化锌精矿,产品指标令人满意。其中硫化铅精矿铅品位66.16%,回收率31.58%;硫化锌精矿锌品位58.27%,回收率13.26%;氧化铅精矿铅品位56.45%,回收率53.38%;氧化锌精矿锌品位42.95%,回收率68.63%。由单矿物试验可知,十二胺、十八胺和KZF三种捕收剂对菱锌矿均有较强的捕收能力,其中KZF的捕收效果最好,十八胺次之,十二胺最后。由表面Zeta电位研究可知,三种捕收剂与硫化钠处理后的菱锌矿发生的作用主要为静电吸附作用,并且KZF的静电吸附作用最强,十八胺其次,十二胺最后;吸附量的研究进一步说明KZF的捕收效果最好。
[Abstract]:There are abundant reserves of lead and zinc oxide ore in our country. It is of great significance to develop and utilize these mineral resources reasonably for the development of our national economy. In this paper, Baoshan lead-zinc oxide ore is taken as the research object. The ore has complex structure, fine grain size and large amount of mud, and belongs to refractory lead-zinc oxide ore. A series of tests have been carried out in view of these characteristics of the ore, and good experimental results have been obtained. It provides some guidance for the separation of the same type of lead-zinc oxide ore. On the basis of the actual mineral concentration test, the single mineral experiment was carried out, and the related mechanism was preliminarily explored. The process mineralogical study shows that the useful elements in the ore are lead and zinc, in which lead grade 3.04, oxidation rate 66.45, zinc grade 7.89, oxidation rate up to 85.68, ore belongs to high oxidation rate oxygen sulfur mixed refractory lead-zinc ore. There are mainly 15 kinds of minerals of carbonate, sulfate, oxide, sulphide and silicate, among which the useful minerals of lead are mainly galena, white lead, lead alum and lead ferrite, and the useful minerals of zinc are mainly smithsonite. Heteropolar ore and sphalerite, gangue minerals are mainly dolomite and so on. Based on the study of process mineralogy, the principle process exploration test was carried out, and the first flotation process of "lead sulphide-zinc sulfide-lead oxide-zinc oxide" was determined, the flotation conditions were studied, and the optimal flotation reagents system was determined. The open circuit test was carried out to determine the number of times of cleaning and cleaning in each stage; the final closed-circuit process was determined as follows: the flotation process of lead sulfide was one coarse, three cleaning and two sweeping; the zinc sulfide flotation used one coarse separation, two cleaning, The process of twice cleaning is used; lead oxide floatation adopts one roughing, two cleaning, two scavenging processes, and zinc oxide flotation adopts one roughing, two cleaning and two scavenging processes. Finally, four products were obtained by closed circuit test: lead sulphide concentrate, zinc sulfide concentrate, lead oxide concentrate and zinc oxide concentrate. The lead grade of lead sulfide concentrate is 66.16, the recovery rate is 31.58; the zinc grade of zinc sulfide concentrate is 58.27, the recovery is 13.26; the lead grade of lead oxide concentrate is 56.45 and the recovery is 53.38; the zinc grade of zinc oxide concentrate is 42.95 and the recovery is 68.63. From the single mineral tests, it can be seen that dodecylamine, octadecylamine and KZF have strong collecting ability to smithsonite, among which KZF is the best, octadecylamine is the second, and dodecylamine is the last. The results of surface Zeta potential indicate that the interaction between the three collector and sodium sulfide treated smithsonite is mainly electrostatic adsorption, and the electrostatic adsorption of KZF is the strongest, the octadecylamine is the second, and the dodecylamine is the last. The study of adsorption capacity further shows that KZF has the best capture effect.
【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

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