活性MgO和铝酸钙水泥结合刚玉-尖晶石浇注料性能对比  

Properties comparison of reactive MgO and calcium aluminate cement bonded corundum-spinel castables

作　　者：赵宗强 张洪睿 陈留刚 Zhao Zongqiang;Zhang Hongrui;Chen Liugang(Henan Key Laboratory of High Temperature Functional Ceramics,School of Materials Science and Technology,Zhengzhou University,Zhengzhou 450052,Henan,China;不详)

机构地区：[1]郑州大学材料科学与工程学院,河南省高温功能材料重点实验室,河南郑州450052

出　　处：《耐火材料》2023年第6期528-530,537,共4页Refractories

基　　金：国家自然科学基金(51802287);河南省优势学科联合基金培育项目(222301420034);郑州市协同创新重大专项(20XTZX12025)。

摘　　要：为改善刚玉-尖晶石浇注料的性能,以板状刚玉、活性氧化铝、烧结镁砂细粉为主要原料,分别以活性MgO和铝酸钙水泥(CAC)为结合剂制备了刚玉-尖晶石浇注料,对比了二者对1600℃煅烧3 h后试样的显气孔率、烧后线变化率、常温抗折强度、常温耐压强度和抗CaO-Al_(2)O_(3)-Fe_(2)O_(3)-SiO_(2)(CAFS)渣侵蚀性能的影响。结果表明:经1600℃热处理后,与CAC结合的刚玉-尖晶石浇注料相比,活性MgO结合的刚玉-尖晶石浇注料的常温抗折强度和常温耐压强度较低,但其体积稳定性、对CAFS渣的抗侵蚀性和抗渗透性显著提高。To improve their properties,corundum-spinel castables were prepared using tabular corundum,reactive alumina and sintered magnesia fines as the main starting materials,reactive magnesia(RM)and calcium aluminate cement(CAC)as the binder,respectively.The apparent porosity,permanent linear change on heating,cold modulus of rupture,cold crushing strength,and corrosion resistance to CaO-Al_(2)O_(3)-Fe_(2)O_(3)-SiO_(2)(CAFS) slag of the two castables fired at 1600℃for 3 h were compared.The results show that,after heat treatment at 1600℃,compared with the CAC-bonded castables,the RM-bonded castables perform lower cold modulus of rupture and cold crushing strength,but significantly improved volume stability and corrosion and penetration resistance to CAFS slag.

关 键 词：活性MgO 刚玉-尖晶石 浇注料 抗侵蚀性 体积稳定性 

分 类 号：TQ175[化学工程—硅酸盐工业]