电解锰渣的理化特性与物相转变研究  

Study on the Physicochemical Properties and Phase Transformation of Electrolytic Manganese Residue

作　　者：赵虎腾 李远霞 谭德斌[1] 张杰[1] 张东方[1] 宋谋胜[1,2] 

机构地区：[1]铜仁学院物理与电子工程系,贵州铜仁554300 [2]铜仁市创建国家环境保护模范城市办公室,贵州铜仁554300

出　　处：《广东化工》2017年第7期64-66,共3页Guangdong Chemical Industry

基　　金：贵州省科学技术联合资助项目(LKT[2012]14;2017GZ81277);铜仁市创模办资助课题(Trcmb16-1)

摘　　要：电解锰渣是电解锰过程中产生的酸性固体滤渣,含有大量有害物质,会引发了严重的水土和环境污染。采用粒度仪、XRF、XRD、DSC-DTG/TG和SEM等,本实验测试了锰渣的理化特性、化学成分、矿物组成、物相转变和组织形貌。结果发现,锰渣颗粒细小,形貌不规则,含水率高。锰渣主要由石英(SiO_2)和石膏(CaSO_4·2H_2O)组成,其化学成分主要为SiO_2、Al_2O_3、CaO、MgO、Fe_2O_3和残留MnO等氧化物。加热时,锰渣脱水和气体排放严重,其中的二水硫酸钙发生物相转变以及分解为SO_3气体,造成二次污染,在1091.7℃时,锰渣则完全熔化成玻璃相。Electrolytic manganese residue （EMR）, is a kind of solid and acid filter residue produced in the production process of electrolytic metal manganese, and contains a large amount of hazardous substances, which can result in the serious water/soil and ecological environmental pollution. By using particle size analyzer, XRF, XRD, DSC-DTG/TG and SEM, the physicochemical properties, chemical composition mineral phase composition, phase transformation, as well as the microstructural morphology were measured and analyzed in this experiment. It is found that, the particle of EMR has the rather fine size and irregular morphology, and also its water content is very heavy. EMR primarily consists of quartz （SiO2） and chemical gypsum （CaSO4·2H2O）, and its chemical composition mainly contains some oxides such as SiO2, Al2O3, CaO, MgO, Fe2O3 the residual MaO. When heated, the heavy dehydration and gas emission would occurred in EMR. And moreover, the calcium sulphate dihydrate would take place the phase transformation and decompose into SO3 gas, which causes the secondary pollution. Finally heated at 1091.7 ℃, EMR would melt into the glass phase.

关 键 词：电解锰渣 理化特性 物相转变 DSC 

分 类 号：TF792[冶金工程—钢铁冶金]