临沧铜铅混合精矿浮选分离试验研究

发布时间：2018-05-12 01:05

本文选题：铜铅混合精矿 + 铜铅分离　；参考：《昆明理工大学》2017年硕士论文

【摘要】：硫化铜铅矿物因矿物之间可浮性相近,导致浮选分离困难。本试验实际矿样取自临沧多金属硫化矿经混合优先浮选得到的铜铅混合精矿,本文通过对不同药剂作用下黄铜矿、方铅矿单矿物表面药剂吸附量的测定及矿物回收率的变化的考察,对药剂作用机理进行了初步的探究,在此基础上对铜铅混合精矿矿样进行选矿试验研究,制定了合适的药剂制度,实现了铜铅混合精矿的有效分离。黄铜矿、方铅矿单矿物试验中,乙基硫氨酯对黄铜矿的选择性捕收作用在几种捕收剂中表现出明显的优势。在pH8时,使用乙基硫氨酯作为铜铅分离浮选中的捕收剂,黄铜矿回收率无明显变化,方铅矿却有明显降低,且随药剂浓度变化,黄铜矿表面乙基硫氨酯的吸附量远比方铅矿表面吸附量多,证明了乙基硫氨酯对黄铜矿具有明显的选择性捕收作用。硫代硫酸钠+可溶性淀粉以2:1的比例混合使用作为铜铅分离时方铅矿的抑制剂,抑制效果明显比单独使用时更有优势。在药剂试验浓度范围内,组合药剂的使用会显著降低方铅矿表面乙基硫氨酯的吸附量,方铅矿回收率表现出明显变化,但黄铜矿浮选回收率没有明显影响,相比方铅矿传统抑制剂重铬酸钾具有对环境危害小的优点;组合抑制剂最佳配比为硫代硫酸钠:可溶性淀粉为2:1。在单矿物试验的基础上对临沧铜铅混合精矿进行浮选分离试验,混合精矿再磨后经过硫化钠脱药,采用硫代硫酸钠+可溶性淀粉作为方铅矿抑制剂,乙基硫氨酯作为捕收剂,经过一次粗选四次精选三次扫选的闭路试验,最终获得铜品位为19.04%,含铅2.12%,铜回收率为89.90%的铜精矿和铅品位为45.80%,含铜1.07%,铅回收率为97.75%的铅精矿,实现了铜铅分离。
[Abstract]:The flotation separation of copper-lead sulfide minerals is difficult due to the similar floatability between minerals. The actual ore sample was obtained from the copper-lead mixed concentrate of Lincang polymetallic sulphide ore after mixed preferential flotation. In this paper, the chalcopyrite was treated with different chemicals. On the basis of the determination of the adsorption capacity of galena single mineral surface and the change of mineral recovery rate, the mechanism of medicament action was preliminarily explored. On the basis of this, the mineral concentration of copper-lead mixed concentrate was tested and studied. The effective separation of copper and lead mixed concentrate was realized by establishing a suitable medicament system. In the single mineral test of chalcopyrite and galena, the selective capture of chalcopyrite by ethyl thiamine has obvious advantages in several kinds of collector. In pH8, when ethyl thiamine was used as collector in flotation of copper and lead, the recovery rate of chalcopyrite did not change obviously, but the galena decreased obviously, and the concentration of chalcopyrite changed with the concentration of copper and lead. The amount of ethyl thiamine adsorbed on chalcopyrite surface is much more than that on galena surface, which proves that ethyl thiamine ester has obvious selective capture effect on chalcopyrite. When sodium thiosulfate soluble starch was mixed at 2:1 as an inhibitor of galena in copper-lead separation, the inhibitory effect was obviously superior to that of using it alone. In the range of reagent test concentration, the adsorption amount of ethyl thiamine on galena surface can be significantly reduced by the use of combined reagent, and the recovery rate of galena shows obvious change, but the flotation recovery rate of chalcopyrite has no obvious effect. Compared with the traditional galena inhibitor, potassium dichromate has the advantage of less harm to the environment, and the optimum ratio of the combined inhibitor is sodium thiosulfate: soluble starch is 2: 1. The flotation separation test of Lincang copper-lead mixed concentrate was carried out on the basis of single mineral test. After regrinding, the mixed concentrate was demineralized by sodium sulphide, sodium thiosulfate soluble starch was used as galena inhibitor, and ethyl thiamine ester was used as collector. After a closed circuit test of four times cleaning and three times cleaning, the copper concentrate with a copper grade of 19.04, lead content 2.12%, copper concentrate with a recovery rate of 89.90% and lead grade 45.80, copper containing 1.07m and lead concentrate with 97.75% lead recovery were obtained. The separation of copper and lead was realized.
【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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