电解锰渣合成堇青石陶瓷及其烧结性能研究  

Synthesis and Sintering Properties of Cordierite Ceramic Prepared by Electrolytic Manganese Residue

作　　者：宋谋胜[1] 张杰[1] 李勇[1] 王应[1] SONG Mousheng;ZHANG Jie;LI Yong;WANG Ying(Department of Physics and Electronic Engineering,Tongren University,Tongren 554300,China)

机构地区：[1]铜仁学院物理与电子工程系

出　　处：《环境科学与技术》2019年第8期34-39,共6页Environmental Science & Technology

基　　金：贵州省自然科学技术联合基金项目(2017GZ81277);贵州省教育厅科研创新人才团队(黔教合人才团队字[2014]40)

摘　　要：电解锰渣因含大量有毒物质而污染生态和环境。该文采用固相反应法,对锰渣、滑石、工业氧化铝、石英的混合坯块在1 140~1 220℃内进行烧结,研究产物的物相构成、烧结性能和组织结构。结果表明,锰渣的主要矿物相为20.9%石英和29%二水硫酸钙。1 210℃以上烧结才能合成堇青石为主晶相的陶瓷,堇青石呈长条状,形貌发育良好。1 140~1 200℃内随着烧结温度升高,样品的吸水率、气孔率快速减少,而密度和强度急剧增大;在1 200℃时具有2.213 g/cm^3的最大密度和70.6 MPa的最高强度;温度超过1 210℃时,样品因严重"过烧"而导致性能急剧下降。Electrolytic manganese residue(EMR) highly pollutes the eco–environment due to involving a large number of poisonous substances. Using the solid phase reaction method, the mixed green compacts containing EMR, talc, industrial alumina and quartz are sintered at 1 140~1 220 ℃,and thus the phase compositions, sintering properties and microstructures of products are studied. It is found that, the mineral phase of EMR primarily consists of quartz(20.9%) and calcium sulphate dehydrate(29%). Only above 1 210 ℃ temperature, the cordierite ceramic as the main phase could be synthesized with the bar–likely and well–development. With the sintering temperature rising at 1 140~1 200 ℃, the water absorption and porosity of samples quickly lowed down, but the density and strength of those rapidly increased and reached the maximal values with density 2.213 g/cm^3 and strength 70.6 MPa at 1 200 ℃, respectively. However, once the temperature exceeded 1 210 ℃, the properties of sample greatly declined owing to the serious"overburning".

关 键 词：锰渣 物相构成 堇青石陶瓷 烧结 抗折强度 

分 类 号：X705[环境科学与工程—环境工程] TB321[一般工业技术—材料科学与工程]