原位硫酸焙烧浸出低品位软锰矿及元素分离  

In-situ sulfuric acid roasting leaching of low grade pyrolusite and element separation

作　　者：滕飞 罗绍华 康雪 翟玉春 梁金生[4] 段昕辉[4] TENG Fei;LUO Shao-hua;KANG Xue;ZHAI Yu-chun;LIANG Jin-sheng;DUAN Xin-hui(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,Hebei,China;Qinhuangdao Key Laboratory of Resources Cleaner Conversion and Efficient Utilization,Qinhuangdao 066004,Hebei,China;Manufacturing Innovation Center for Solid Waste Resource Utilization and Ecological Development(Hebei University of Technology),Tianjin 300130,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]东北大学秦皇岛分校资源与材料学院,河北秦皇岛066004 [3]秦皇岛市资源清洁转化与高效利用重点实验室,河北秦皇岛066004 [4]固废资源利用与生态发展制造业创新中心(河北工业大学),天津300130

出　　处：《中国冶金》2021年第5期72-77,共6页China Metallurgy

基　　金：国家自然科学基金资助项目(51604066);河北省自然科学基金资助项目(E2019501100);河北省典型铁尾矿库区土壤重金属分布及尾矿综合利用技术研究资助项目(802060671901)。

摘　　要：研究了一种低品位软锰矿焙烧-水浸提锰的新方法。以锰和铁的提取率为指标,通过正交试验,确定了焙烧工艺的最合适条件为酸矿比2∶1,焙烧温度650℃,水酸比0.2∶1,焙烧时间4 h。进一步研究溶出温度、溶出时间、溶出液固比等因素对锰、铁提取率的影响,确定了溶出试验的最合适条件为搅拌速度300 r/min,溶出温度90℃,溶出时间50 min,溶出液固比6∶1,此条件下锰的提取率可达98.16%,铁的提取率约为0.87%,实现了低品位软锰矿中锰元素的高效提取以及锰与铁、硅元素的有效分离。A new method was studied for extracting manganese from low-grade pyrolusite with H2SO4 roasting and subsequent water leaching. Taking the extraction rate of manganese and iron as the index, through the orthogonal test, the most suitable roasting condition for extracting manganese was determined as follows: acid-ore ratio 2∶1, roasting temperature 650 ℃, water-acid ratio 0.2∶1, roasting time 4 h. The effects of stirring speed, dissolution temperature, dissolution time and dissolution liquid-solid ratio on the extraction rate of Mn and Fe were further studied, the optimum conditions for the dissolution test were determined as follows: stirring speed 300 r/min, dissolution temperature 90 ℃, dissolution time 50 min, dissolution liquid-solid ratio 6∶1. Under this condition, the maximum extraction of Mn reached 98.16%, and the minimum extraction of Fe was 0.87%, which realized the efficient extraction of Mn from low-grade pyrolusite and the effective separation of Mn from Fe and Si.

关 键 词：软锰矿 硫酸 焙烧 水浸 硫酸锰 

分 类 号：TF792[冶金工程—钢铁冶金]