摘要
氧化铅锌矿是一种富含铅、锌和铁的多金属矿产资源,由于其矿相结构复杂,铅、锌品位低,矿泥量大,导致传统的浮选方法难以高效定向分选铅、锌,得到的浮选精矿品位低。回转窑直接还原虽然可以回收铅、锌资源,但存在铁回收率低,设备故障率高,作业率低等问题。为了高效回收氧化铅锌矿中的铁、铅和锌有价金属元素,提出了转底炉直接还原的方法,该方法具有还原温度高、还原速度快、金属回收率高等特点。实验研究了不同工艺参数对氧化铅锌矿含碳球团直接还原的影响关系,得到的最佳工艺参数为：还原温度1 300℃,还原时间30min,碳氧比为1.2,Ca（OH）2的添加量为5%（质量分数）。还原后球团金属化率为95.89%,铅、锌挥发率分别为95.23%和98.56%。
Lead-zinc ore is a polymetallic mineral resource rich in lead,zinc and iron.Due to its complex mineral structure,low lead and zinc grades and large amount of slime,it is difficult for traditional flotation methods to efficiently orient lead and zinc,the obtained flotation concentrate has a low grade.Although direct reduction of rotary kiln can recover lead and zinc resources,there are problems such as low iron recovery rate,high equipment failure rate,and low operating rate.In order to extract iron,lead and zinc from the raw material efficiently,a direct reduction method of rotary hearth furnace was put forward.This method has the characteristics of high reduction temperature,fast reduction rate and high metal recovery.The influences of the direct reduction technological parameters on the carbon containing pellets of the lead-zinc oxide ore were experimentally investigated.The results show that the optimum reaction parameters are reduction temperature of 1 300℃,reaction time of 30 min,carbon and oxygen ratio of 1.2 and w（Ca（OH）2）=5 mass%.Under above reaction parameters,the metallization rate of pellets is 95.89%,the volatilization rate of lead and zinc is 95.23% and 98.56%,respectively.
作者
洪陆阔
高建军
齐渊洪
王海风
HONG Lu-kuo;GAO Jian-jun;QI Yuan-hong;WANG Hai-feng(State Key Laboratory for Advanced Iron and Steel Processes and Products,Central Iron and Steel Research Institute,Beijing 100081,China;Research and Development Department,CISRI Sunward Technology Co.,Ltd.,Beijing 100081,China)
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2018年第9期703-709,共7页
Journal of Iron and Steel Research
基金
国家重点研发计划资助项目(2017YFB0304304)
关键词
氧化铅锌矿
转底炉
直接还原
金属化率
挥发率
lead-zinc oxide ore
rotary hearth furnace
direct reduction
metallization rate
volatilization rate
