Crystallization Characteristic of Glass-ceramic Made from Electrolytic Manganese Residue  

作　　者：钱觉时 

机构地区：[1]College of Materials Science and Engineering,Chongqing University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第1期45-49,共5页武汉理工大学学报（材料科学英文版）

基　　金：the National High Technology Research and Development Program (‘863’ Program) of China (No. 2008AA031206);Key Scientific and Technological Projects of Chongqing (No. CSTC2007AB4019)

摘　　要：Electrolytic manganese residue （EMR） is a waste from electrolytic manganese industry that contains high concentration of toxic substances. Since the EMR disposal in landfill sites has a serious environmental impact, new ways of EMR utilization are being sought. Considering the melting of EMR to a glass at high temperature was a relatively less energy-intensive process, EMR was first made into a base glass and then the ground base glass was heat-treated in a certain procedure to make a glass-ceramic and the crystallization process was studied. It was determined by X-ray diffraction （XRD） that the primary crystalline phases of the EMR glass-ceramic were diopside and anorthite, which formed the surface crystallization mechanism with a crystallization activation energy of 429 kJ/mol. Scanning electron microscopy （SEM） observation showed that a layer of small spherical particles with an average size of about 0.5 ~tm were covered on the glass matrix surface, and among them there were some big particles. The low melting temperature and crystallization activation energy make it promising to reuse EMR for glass-ceramic production.Electrolytic manganese residue （EMR） is a waste from electrolytic manganese industry that contains high concentration of toxic substances. Since the EMR disposal in landfill sites has a serious environmental impact, new ways of EMR utilization are being sought. Considering the melting of EMR to a glass at high temperature was a relatively less energy-intensive process, EMR was first made into a base glass and then the ground base glass was heat-treated in a certain procedure to make a glass-ceramic and the crystallization process was studied. It was determined by X-ray diffraction （XRD） that the primary crystalline phases of the EMR glass-ceramic were diopside and anorthite, which formed the surface crystallization mechanism with a crystallization activation energy of 429 kJ/mol. Scanning electron microscopy （SEM） observation showed that a layer of small spherical particles with an average size of about 0.5 ~tm were covered on the glass matrix surface, and among them there were some big particles. The low melting temperature and crystallization activation energy make it promising to reuse EMR for glass-ceramic production.

关 键 词：electrolytic manganese residue （EMR） GLASS-CERAMIC CRYSTALLIZATION heat treatment 

分 类 号：X756[环境科学与工程—环境工程]