预烧温度对电解锰渣坯块烧结性能的影响  

Effect of Pre–firing Temperatures on Sintering Properties of Electrolytic Manganese Residue Compacts

作　　者：杨震 阴泽江 杨金玉 张杰[1] 宋谋胜[1] YANG Zhen;YIN Zejiang;YANG Jinyu;ZHANG Jie;SONG Mousheng(Department of Physics and Electronic Engineering,Tongren University,Tongren 554300,Guizhou,China)

机构地区：[1]铜仁学院物理与电子工程系,贵州铜仁554300

出　　处：《铜仁学院学报》2018年第9期36-40,共5页Journal of Tongren University

基　　金：贵州省科学技术联合基金(LH字[2016]7293号);贵州省大学生创新创业训练项目(201710665007)

摘　　要：锰渣中含有大量有害物质而污染环境,大量堆放或填埋是当前处理锰渣的主要方式。以黄土为对比实验,通过对锰渣在500~700℃间预烧,研究预烧后的锰渣在1040~1100℃烧结温度下的烧结特性。结果表明,随预烧温度和烧结温度的升高,锰渣坯块的烧失率增加,吸水率、气孔率急剧减小,而体积密度和抗折强度增大,这与超过1080℃时熔融液相的出现有关。经650~700℃预烧后的样品在1060~1080℃温度下烧结具有最佳的综合性能,其密度可达1.77~1.85 g/cm^3,抗折强度可达24.8~33.3 MPa,完全可用来制作建筑材料领域中的轻质烧结砖,或者作为相关建筑材料的辅助原料。Manganese residue(Mn-residue)contains a large amount of hazardous substances those can result in the serious environmental pollution.The main way to dispose Mn-residue is the massive landfilling or stacking.Using yellow earth as a comparison,the sintering properties at 1040~1100℃sintering temperatures of Mn-residue after prefired at 500~700℃were studied.It is showed that,with the pre-firing and sintering temperatures rising,the weight loss of Mn-residue compacts increased,water absorption and porosity sharply lowed down,but their bulk densities and bending strengths both increased,which is closely linked with the appearance of melted liquid phase once exceeding 1080℃.When sintered at 1060~1080℃,the samples pre-fired at 650~700℃exhibited the best combination properties with 1.77~1.85 g/cm^3 bulk densities and 24.8~33.3 MPa bending strengths.Therefore,it is feasible for the pre-fired Mn-residue to use as the light sintered bricks in the filed of building materials,or as the auxiliary material for the related building materials.

关 键 词：锰渣 预烧温度 烧结性能 对比 

分 类 号：X781[环境科学与工程—环境工程]