热处理温度对利用电解锰渣和页岩制备发泡陶瓷的影响

Effect of Heat Treatment Temperature on Preparation of Foamed Ceramic by Electrolytic Manganese Residue and Shale

以贵州铜仁某厂电解锰渣和铜仁页岩为主要原料,SiC为高温发泡剂制备高温发泡陶瓷,研究了热处理温度对发泡陶瓷的膨胀率、体积密度、吸水率、气孔率及物相的影响。实验结果表明:电解锰渣的添加量为60%,页岩为20%,热处理温度为1170℃样品性能最佳,体积密度为0.33 g/cm^3,吸水率222.79%,气孔率为73.52%,厚度发泡率为118.15%,主晶相为辉石。研究发现配方中氧化铝和氧化硅的含量对发泡陶瓷的膨胀率和体积密度影响显著,氧化铝和氧化硅含量较低时能在较低温度下制得发泡陶瓷。研究为电解锰渣的资源化综合利用探索了一条新途径。

High temperature foamed ceramic was prepared with electrolytic manganese residue Tongren shale and SiC as high-temperature foaming agent.The effects of heat treatment temperature on expansion ratio,bulk density,water absorption,porosity and phase were investigated.The results showed that the amount of electrolytic manganese residue was 60%,Tongren shale was 20%,excellent comprehensive performance could be obtained when heat treatment temperature was 1170℃.Under this circumstance,the bulk density,water absorption,porosity,thickness expansion ratio and phase were 0.33 g/cm^3,222.79%,73.52%,118.15%and pyroxene.It was found that the content of alumina and silica in the formulation had a significant effect on the expansion ratio and bulk density of the foamed ceramic.When the content of alumina and silica was low,the foamed ceramic could be produced at a lower temperature.This study explored a new approach for the comprehensive utilization of electrolytic manganese residue.