高泥质氧化铜矿浮选试验研究

发布时间：2018-05-21 02:12

本文选题：铜矿 + 高氧化率　；参考：《武汉科技大学》2016年硕士论文

【摘要】：我国氧化铜矿多具有品位低、嵌布粒度细、泥质脉石含量高等特点。所以,氧化铜矿分选在我国矿业界面临着许多困难。本论文对某氧化铜矿石进行了详细的研究。首先,该铜矿石中的氧化率高达84.89%,主要以游离氧化铜形式存在;其次以类质同象或吸附的方式赋存在褐铁矿中,致使铜矿物回收难度大。且矿石中含有大量细粒易浮泥质脉石矿物,在浮选流程中吸附消耗大量浮选药剂,降低精矿产品质量。根据该矿石性质制定了硫化浮选的浮选流程。通过一系列单因素条件试验,确定了合理药剂制度和最佳试验条件,进行全流程开路试验和闭路试验以及扩大连续试验。浮选条件试验结果表明:硫化钠对目的矿物的回收率和品位有着显著影响,必须加入大量的硫化钠才能保证得到较好的浮选指标。而添加硫酸铵不能明显提高该矿石粗选效果。在磨矿细度为86.35%-0.074mm的条件下,硫化钠作为活化剂,CMC作为矿泥抑制剂,丁黄药作为捕收剂,松醇油作为起泡剂,经过三粗三扫两精得到了理想的选矿指标,精矿1品位27.94%,回收率达到41.98%,精矿2品位18.52%,回收率32.15%;精矿总计含铜22.89%,回收率74.13%。扩大连续试验得到了与实验室试验相吻合的结果,确定实验室的浮选工艺流程能够满足扩大连续试验要求,给矿铜品位4.43%的条件下,获得精矿1品位27.77%,回收率39.62%。精矿2品位16.85%,回收率34.67%;精矿总计含铜21.33%,回收率74.29%。
[Abstract]:Most copper oxide ores in China are characterized by low grade, fine grain size and high content of muddy gangue. Therefore, the separation of copper oxide ore faces many difficulties in China's mining industry. In this paper, a copper oxide ore is studied in detail. Firstly, the oxidation rate of the copper ore is as high as 84.89, which mainly exists in the form of free copper oxide. And the ore contains a large number of fine and easy to floatation gangue minerals, adsorption in the flotation process consumption of a large number of flotation reagents, reduce the quality of concentrate products. According to the properties of the ore, the flotation process of sulphide flotation was established. Through a series of single factor conditional tests, the reasonable medicament system and the best test conditions were determined, and the open circuit test, closed circuit test and extended continuous test were carried out. The experimental results of flotation conditions show that sodium sulfide has a significant effect on the recovery and grade of the target minerals, and a large amount of sodium sulfide must be added to ensure a better flotation index. But the addition of ammonium sulfate can not obviously improve the effect of rough separation of the ore. Under the condition of grinding fineness of 86.35%-0.074mm, sodium sulphide as activator, butadiene as collector and pine oil as foaming agent, the ideal mineral dressing index is obtained. The concentrate has a grade of 27.94 with a recovery of 41.98 and a concentrate of 18.52 with a recovery of 32.15.The concentrate contains a total of 22.89 copper and a recovery of 74.1313. The results of extended continuous test are consistent with those of laboratory test. It is determined that the flotation process in laboratory can meet the requirements of expanded continuous test. Under the condition of ore copper grade of 4.43%, the concentrate grade 1 is 27.77 and the recovery rate is 39.62%. The concentrate grade is 16.855.The recovery rate is 34.670.The concentrate contains a total of 21.33Cu and the recovery rate is 74.29.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD952;TD923

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