利用电解锰渣制备轻质多孔陶瓷块状材料的研究

Study on preparation of porous lightweight ceramic mass material with electrolytic manganese residue

利用电解锰渣为主要原料制备一种轻质多孔的陶瓷块状材料,并研究配方、成型压力、烧结温度、化学组成对样品性能的影响。结果表明:电解锰渣的用量越大样品的干燥收缩越大;成型压力越大样品越难形成均匀气孔。最佳的烧成温度为1 150℃,热处理后直径方向膨胀率达21.44%,体积密度为0.68 g/cm3,气孔率为58.62%,主晶相为钙长石、四氧化三锰和石英。化学组成影响气孔形态和分布,在同一烧成温度下,氧化钠、氧化钾、氧化镁、氧化钙、氧化硅的总含量越高样品的气孔越大甚至在样品表面出现开孔,氧化铝含量越高气孔越小甚至不产生气孔。

The porous lightweight ceramic bulk material was prepared by electrolytic manganese residue.The effects of for-mulation,forming pressure,sintering temperature and chemical composition on the properties of sample were investigated.Results showed that the more the addition of electrolytic manganese residue,the greater of the dry shrinkage of sample.The greater the mold pressure,the more difficult to prepare a uniform pore structure.The optimum sintering temperature was 1 150℃,the swelled rate of diameter direction was 21.44%after heat treatment,bulk density was 0.68 g/cm3,porosity was 58.62%,and the main crystal phases were calcite,manganic manganous oxide and quartz.The chemical composition affected the morphology and distribution of the stomata.At the same sintering temperature,the more the total contents of sodium oxide,potassium oxide,magnesium oxide,calcium oxide and silica the bigger of stomata,and even open pores appeared on the surface of the sample.The higher the content of alumina,the smaller the stomata and even did not produce stomata.