铬铁矿对高炉渣制备微晶铸石晶化行为及理化性能的影响  

Effect of Chromite on Crystallization Behavior and Physicochemical Properties of Microcrystalline Cast Stone Prepared from Blast Furnace Slag

作　　者：王新翔 王艺慈[1] 王晨 罗果萍[1] 柴轶凡[1] 安胜利[1] WANG Xinxiang;WANG Yici;WANG Chen;LUO Guoping;CHAI Yifan;AN Shengli(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,包头014010

出　　处：《硅酸盐通报》2023年第7期2497-2503,共7页Bulletin of the Chinese Ceramic Society

基　　金：内蒙古科技成果转化专项项目(2019CG073);国家重点研发计划(2020YFC1909105);内蒙古自治区科技重大专项计划(2021ZD0016);内蒙古自治区高等学校科学研究项目(NJZZ23056);内蒙古自治区直属高校基本科研业务费项目。

摘　　要：以包钢高炉渣为主要原料,配加少量铬铁矿,在高温渣液降温过程中采用一步保温热处理方法制备微晶铸石,通过熔点测定、差热分析、X射线衍射,扫描电子显微镜观察并结合理化性能测试,研究了铬铁矿加入量对微晶铸石晶化行为和理化性能的影响规律,为包钢高炉渣的低成本高值化利用开辟了新途径。结果表明:在原料配比为高炉渣95%、铬铁矿5%(质量分数)时,微晶铸石整体析晶,主晶相为镁黄长石和铝黄长石,抗折强度为31.88 MPa,密度为3.439 g·cm^(-3),吸水率为0.036%,耐酸性为0.145%,耐碱性为0.033%,符合国家建筑材料标准,完全可以替代天然大理石和花岗岩用作建筑装饰材料。Using Baotou steel blast furnace slag as the main raw material and a small amount of chromite,microcrystalline cast stone was prepared by one-step heat treatment method in the cooling process of high temperature slag liquid.Through melting point measurement,differential thermal analysis,X-ray diffraction,scanning electron microscope observation and physicochemical properties test,the influence law of chromite addition amount on crystallization behavior and physicochemical properties of microcrystalline cast stone ware studied.It opens up a new way for low cost and high value utilization of Baotou steel blast furnace slag.The results show that:when the raw material ratio is 95%of blast furnace slag and 5%(mass fraction)of chromite,the overall crystallization of microcrystalline cast stone,the main crystalline phase is magnesium and aluminum feldspar,the bending strength is 31.88 MPa,the density is 3.439 g·cm^(-3),the water absorption rate is 0.036%,the acid resistance is 0.145%,the alkali resistance is 0.033%,in line with the national standards for building materials.It can completely replace natural marble and granite as architectural decoration materials.

关 键 词：包钢高炉渣 铬铁矿 微晶铸石 晶化行为 理化性能 最优配比 

分 类 号：TD926.4[矿业工程—选矿]