可用于建筑材料的电解锰渣性能试验研究  

Properties of Electrolytic Manganese Slag Used as Building Materials

作　　者：钱觉时[1] 侯鹏坤[1] 王智[1] 章一颖[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《材料导报》2009年第10期59-61,74,共4页Materials Reports

基　　金：国家高技术研究发展计划重点项目(863计划)(2008AA031206);重庆市科技攻关项目(CSTC2007AB4019)

摘　　要：电解锰渣是由锰矿(通常为碳酸锰矿)采用电解方法生产金属锰过程中产生的废渣,了解电解锰渣的基本性质有利于其资源化利用。采用X射线衍射、DSC、化学分析和筛分等手段对2种来源的电解锰渣的基本性能进行了分析。结果表明,电解锰渣中的主要结晶矿物为石英、二水石膏、莫来石及赤铁矿,电解锰渣有比较明显的石膏受热脱水峰,但峰值小;电解锰渣中SiO2、SO3、Al2O3、CaO和Fe2O3的总量占80%以上;电解锰渣中硫酸盐有二水石膏,也有含量较高的大溶解度硫酸盐。结果还表明,电解锰渣可归属于硅酸盐材料;由于电解锰渣存在多种硫酸盐,在利用石膏作为水泥缓凝剂等时还需深入研究。The electrolytic manganese slag is a residue from production of manganese in electrolyzing the manganese ore （manganese carbonate）. It is necessary to realize the primary properties of the slag before utilization. Two electrolytic manganese slags are investigated using XRD, DSC, chemical analysis and screening. It is shown that the main minerals in the slag are quartz, gypsum, mullite and hematite; an obvious characteristic apex of gypsum appears in the DSC curve when dehydrating but the apex is low; total amount of SiO2, SO3, Al2O3, CaO and Fe2O3 is above 80%; there are several kinds of sulphates, not only calcium sulphate but also other sulphates with high solubility. It is suggested that the electrolytic manganese slag be classified as a silicate residue and more studies be done before using the slag as a retarder in cement due to the soluble sulphates.

关 键 词：电解锰渣 石膏 硫酸盐 

分 类 号：TQ172.44[化学工程—水泥工业] TU5[化学工程—硅酸盐工业]