含碳难选铅锌硫化矿分离工艺研究-矿物加工工程专业论文.docxVIP

I I II II 含碳难选铅锌硫化矿分离工艺研究 摘要 矿产资源作为不可再生资源，随着人类的开采，特别是有些地方由于管理不善等多方 面的原因而导致的滥采滥挖，使得矿产资源日趋枯竭，矿石亦日趋贫、细、杂，为了扩大 资源、增加产品品种、降低生产成本，故加大对低品位矿石的利用力度并且尽可能的综合 回收矿石中的各种有价金属已经势在必行。 本研究确定采用碳-铅-锌依次优先浮选流程来处理此矿样。脱碳循环通过加入少量石 灰调节矿浆 pH 值，改变泡沫性质，从而达到利用松醇油脱碳的目的，减少了铅锌在脱碳 过程的损失；铅循环用石灰作矿浆 pH 值调整剂和黄铁矿、磁黄铁矿的抑制剂，硫酸锌和 亚硫酸钠作铁闪锌矿的抑制剂，乙硫氮作捕收剂来优先浮选铅矿物，并在铅精选作业添加 少量铁铬盐木质素，实现碳铅分离，得到合格的铅精矿；锌循环选用硫酸铜活化闪锌矿， 用丁黄药进行浮锌，获得指标较好的锌精矿。试验结果表明，整个药剂制度对此矿样适应 性强，对同类性质的矿石也具有适应性。 实验室小型闭路试验预先脱碳，选铅循环采用一粗一扫两精，选锌循环采用一粗两扫 两精，获得了如下指标：铅精矿品位47.20％、回收率66.89％；锌精矿品位48.90％、回收 率79.25％。 分析不用煤油条件下作用机理。分析结果表明，通过加入石灰，改变矿浆体系的液- 气之间的表面张力，利用碳矿物的天然可浮性，在不加入捕收剂的条件下，可有效解决碳 质的分离问题。 分析方铅矿-乙硫氮的矿浆中的电化学机理，得出使用乙硫氮作为铅矿物的捕收剂具 有比黄药具有更好的选择性。 分析了铁铬木质素的作用机理，得出在碳铅分离中使用铁铬木质素作为提高铅精矿矿 的品位是有效的。 关键词：含碳铅锌矿；预先脱碳；铅锌分离 The study on the separation of the refractory carbon-bearing lead- zinc sulfide ore Abstract As the nonrenewable resources, the mineral resources are becoming depleted, and the mineral ores are becoming leaner, finer and more complex due to the different reasons. In order to enlarge the mineral resources and reduce the production cost, it is so inevitable to enhance the utilization rates of low grade ore and recover the different valuable metals as possible. The Priority flotation for carbon-lead-zinc was employed to handle the SanGui kou lead-zinc ore. During removing carbon in the ore, the small amount of lime was added to regulate the Ph value of the slurry to change bubbles nature, then the carbon could be removed by using the pine oil and reduced the loss of the lead and zinc. During the flotation of the lead, lime was also to adopted as regulator for the slurry PH value and depressant for pyrite and magnetite, zinc sulphate and sodium sulfite as depressor for marmatite and HYPERLINK /wiki/Dithiocarbamate Sodium as collector, and adding a little mount of lignin in the cleaner of rougher concentrate to realize the separation of the lead and carbon. The copper sulfate and BX were adopted as activator and collector respectively for zinc flotation.