用工业镁渣制备六铝酸钙/钙铝黄长石复相材料研究  

Preparation of calcium hexaaluminate/gehlenite composite from industrial magnesium slag

作　　者：白频波 邢莉 孔祥辰[3] 田玉明[3,4] Bai Pinbo;Xing Li;Kong Xiangchen;Tian Yuming(Yangquan Changqing Petroleum Proppant Co.,Ltd.,Yangquan 045200,Shanxi,China;不详)

机构地区：[1]阳泉市长青石油压裂支撑剂有限公司,山西阳泉045200 [2]山西工程职业学院,山西太原030001 [3]太原科技大学材料科学与工程学院,山西太原030024 [4]山西科技学院,山西晋城048000

出　　处：《耐火材料》2023年第3期226-230,共5页Refractories

基　　金：山西省基础研究计划青年项目(2022030212123);来晋博士科研资助项目(20222069)。

摘　　要：为实现工业废渣的有效利用,以工业镁渣、氧化铝为主要原料,加入4%(w)的PVA塑化剂,采用高温无压烧结法分别在1300、1400、1500、1600℃保温3 h后,得到六铝酸钙/钙铝黄长石(CA6/C2AS)复相耐火材料,研究热处理温度对其物相组成、物理性能的影响。结果表明:经1500℃热处理3 h后的试样综合性能较优,其体积密度为1.59 g·cm^(-3),显气孔率为52.7%,抗折强度为30.8 MPa,荷重软化温度为1544℃,水化36 h后质量增加率不高于0.22%,800℃热震后抗折强度保持率为52.7%。试样具有较好的结构稳定性、抗水化性和抗热震性。In order to realize the effective utilization of industrial waste slag,industrial magnesium slag and alumina were used as the main raw materials,and 4 mass%PVA plasticizer was added,the calcium hexaaluminate/gehlenite(CA 6/C 2AS)composite was obtained by high temperature pressureless sintering at 1300,1400,1500 and 1600℃for 3 h,respectively.The effects of the heat treatment temperature on the phase composition and the physical properties of the samples were studied.The comprehensive properties of the samples after heat treatment at 1500℃for 3 h are optimal:1.59 g·cm-3 bulk density,52.7%apparent porosity,30.8 MPa modulus of rupture,1544℃refractoriness-under-load,lower than 0.22%mass gain rate after hydration for 36 h,and 52.7%modulus of rupture retention ratio after thermal shock at 800℃.The samples show good structural stability,hydration resistance and thermal shock resistance.

关 键 词：CA6/C2AS 镁渣 抗水化性 抗热震性 荷重软化温度 

分 类 号：TQ175[化学工程—硅酸盐工业]