天然氧化锰矿烟气脱硫机理研究  

Mechanism for Flue Gas Desulfurization by Using Natural Manganese Oxides

作　　者：李建国 李运姣 曹新龙 叶万奇 章贤臻 唐三川[2] LI Jian-guo;LI Yun-jiao;CAO Xin-long;YE Wan-qi;ZHANG Xian-zhen;TANG San-chuan(School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China;Changsha Research Institute of Mining and Metallurgy Co Ltd,Changsha 410012,Hunan,China)

机构地区：[1]中南大学冶金与环境学院,湖南长沙410083 [2]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《矿冶工程》2018年第5期79-83,共5页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51574043)

摘　　要：采用2种不同品位的软锰矿在流化床反应器中对模拟工业烟气进行脱硫。通过X射线衍射、扫描电镜、比表面积及孔径分布测试等技术手段,对2种锰矿脱硫前后的样品进行分析表征,观察锰矿的表面形貌及微观结构变化,并研究了2种锰矿的脱硫效果。结果表明:低品位锰矿中MnO_2呈无定形结构,表面粗糙、多孔,比表面积大,具有更好的脱硫性能,反应初期脱硫率可达99%,穿漏硫容达186.60 mg/g;高品位锰矿表面相对较为平整,比表面积小,脱硫过程中矿物表面逐渐致密,比表面积及孔径逐渐变小,穿漏硫容为62.87 mg/g。A desulturation test was conducted with a fluidized bed reactor for the simulated industrial flue gas by using different grades of pyrolusite. The dirt〉rent manganese ore samples before and alter desulfuration were analyzed and characterized by using X-ray diffraction, scanning electron microscopy, BET specific surface area and pore size distribution tests, and effects of surface morphology and microscopic changes of mineral on the desulfuration process and desulfuration efficiency of manganese ore were investigated. Results showed that the low-grade manganese ore has better desulfurization performance due to the porous structure, higher specific surface area and amorphous MnO2 content. The initial desulfuration efficiency reached 99% and sulfur breakthrough capacity was 186.60 mg/g. In contrast, the high-grade manganese ore has a relatively flat surface with lower specific surface area. During the desulfuration process, the surface of the high-grade manganese ore gradually turned to be compact, the specific surface area and pore size gradually became smaller, and the sulfur breakthrough capacity of the high-grade manganese ore was only 62.87 mg/g.

关 键 词：软锰矿 硫酸锰 烟气 脱硫 机理 

分 类 号：X701[环境科学与工程—环境工程]