奥斯麦特炼铜炉渣改性及铜铁回收的研究

发布时间：2018-03-07 19:04

本文选题：铜渣　切入点：改性　出处：《武汉科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：铜渣中含有大量的铜、铁及稀贵金属。铜渣中铜品位和铁品位分别在1%、40%左右，超过我国目前铜矿和铁矿的可采品位，是一种质优量大的二次资源。本课题以大冶有色金属公司奥斯麦特炼铜炉渣为对象，，基于铜渣的性质和特点，通过对铜渣改性处理回收铜渣中铜和铁，实现铜渣的资源化利用。采用光学显微、SEM、XRD、多元素分析及铜铁物相分析等方法对奥斯迈特炼铜炉渣的工艺矿物学研究，结果表明：渣中铜含量0.99%，主要是以硫化铜和金属铜的形式存在；铁含量43.73%，主要以铁橄榄石和磁铁矿形式存在。对铜渣进行焙烧-浸出-磁选回收铁的试验研究表明：铜渣中添加20%碳酸钠，在900℃下焙烧90min；焙砂磨细至-0.074mm占90%，用18.7%硫酸浸出、液固比4:1、浸出温度20℃、时间40min；浸出渣经480kA/m的磁选，铁精矿品位为61.52%、回收率为82.26%。对铜渣进行熔融-浮选-浸出-磁选回收铜和铁的试验研究表明：1250℃的熔融铜渣中添加10%碳酸钠、15%黄铁矿，保温30min；处理渣磨细至-0.074mm占91.37%进行浮选，矿浆pH6.5，捕收剂用量60g/t，起泡剂用量50g/t的条件下，铜精矿品位2.87%，回收率87.99%；浮选尾矿用浓度18.7%硫酸浸出，液固比4:1，浸出温度20℃，时间40min；浸出渣经过480kA/m的磁选，铁精矿品位和回收率分别为57.02%和47.71%。研究采用热力学方法对焙烧及浸出过程的反应进行了分析。
[Abstract]:Copper slag contains a large amount of copper, iron and precious metals. The copper grade and iron grade of copper slag are 1% and 40% respectively, which is more than two times of copper and iron ore grade in China.
Subject to the Daye Daye Non-Ferrous Metals Co of Ausmelt Copper smelting slag as the object, the nature and characteristics of copper slag based on the copper slag modification and recovery of copper and iron in copper slag, realize the resource utilization of copper slag.
Using optical microscopy, SEM, XRD, multi elements analysis and phase analysis of copper and iron process mineralogy, the method of Ausmelt Copper smelting slag and the results show that: 0.99% the copper content in slag are mainly copper sulfide and copper form; iron content of 43.73%, mainly in the form of iron olivine and magnetite.
Study on roasting leaching magnetic separation iron on copper slag showed that adding 20% sodium carbonate in copper slag, calcined at a temperature below 900 DEG 90min; calcine ground to -0.074mm accounted for 90%, with 18.7% sulfuric acid leaching, liquid-solid ratio 4:1, extraction temperature 20, time 40min; leaching slag by magnetic separation 480kA/m and the iron concentrate grade is 61.52%, the recovery rate was 82.26%.
Experimental study on melt flotation leaching magnetic separation of copper and iron in copper slag showed that adding 10% sodium carbonate, molten copper slag 1250 C 15% pyrite, insulation 30min; ground slag processing to -0.074mm accounted for 91.37% of the pulp pH6.5, flotation, collector dosage 60g/t, foaming agent 50g/t content condition next, the copper concentrate grade of 2.87%, recovery rate of 87.99%; flotation tailings with concentration of 18.7% sulfuric acid leaching, leaching liquid-solid ratio 4:1, temperature 20, time 40min; leaching residue after 480kA/m separation, iron concentrate grade and recovery rate were 57.02% and 47.71%.
The thermodynamic method was used to analyze the reaction of roasting and leaching.

【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X758

【参考文献】