CA_(6)细粉加入量对钢包永久衬用Al_(2)O_(3)-CaO系隔热浇注料抗渣性能的影响  

Effect of CA_(6)grain addition on the slag resistance of Al_(2)O_(3)-CaO insulating castable for permanent lining of ladles

作　　者：王国林 殷超凡 白宏宇 白帆 王黎 董宾宾 Wang Guolin;Yin Chaofan;Bai Hongyu;Bai Fan;Wang Li;Dong Binbin(Yanshi Zhongyue Refractories Co.,Ltd.,Luoyang 471924,China;School of Materials Science and Engineering,Luoyang Institut e of Science and Technology,Luoyang 471023,China)

机构地区：[1]偃师中岳耐火材料有限公司,洛阳471924 [2]洛阳理工学院材料科学与工程学院,洛阳471023

出　　处：《耐火与石灰》2024年第3期30-33,38,共5页Refractories & Lime

基　　金：河南省重点研发专项(No.231111230300);洛阳市重大科技创新专项(No.2301009A)。

摘　　要：为提高钢包周转过程中的保温性能,钢水冶炼过程常使用保温隔热材料以适应连铸钢水温度的变化,满足炉外精炼和连铸工艺需求。本文选用六铝酸钙(CA6)、97电熔镁砂、氧化铝微粉、白刚玉等为原料,纯铝酸盐水泥为主要结合剂,加入PC60减水剂和有机纤维,制备出用于钢包永久衬的隔热浇注料。探究了CA_(6)细粉加入量对隔热浇注料抗渣性能的影响。试验结果表明:1100℃煅烧后主要有颗粒状的CA_(2)生成,同时在基质内有大量片状的CA_(6);当煅烧温度升至1500℃,试样中的CA_(2)完全转化成了CA_(6),在试样内部仅检测出Al2O3和CA_(6)的特征峰;随着CA_(6)加入量的增加,试样的常温抗折强度和耐压强度呈现先上升后下降的趋势;同时,试样的导热系数呈现下降的趋势;当添加质量分数为10%CA_(6)时,试样的抗渣侵蚀性能较佳。To improve the insulation performance of ladles during turnover,insulating materials are often used in the liquid steel smelting process to fit the temperature changes of liquid steel in continuous casting and meet the requirements of secondary refining and continuous casting processes.The dedicated insulating castable for permanent lining of ladles was prepared with raw materials including calcium hexaluminate,fused magnesia 97%,alumina micro powder,white fused alumina,etc.In its preparation,pure aluminate cement served as the main binderand PC60 water-reducing agent and organic fibers were added.Then the effect of CA_(6) grain addition on the slag resistance of insulating castable was st udied.Ac cording to the experiment,when the calcination temperature was 1100℃,the main generated product was granular CA_(2),and a large number of sheet-like CA_(6) will be generated inside the matrix.When the calcination temperature rose to 1500℃,CA_(2)in the sample was completely transformed into CA_(6),and only the characteristic peaks of Al_(2)O_(3)and CA_(6)were detectable inside the sample.As the adding amount of CA_(6)increased,the flexural strength and compressive strength of the sample under room temperature first increased and then decreased.Besides,the thermal conductivity of the sample gradually decreased.The best slag erosion resistance performance was observed when 10%CA_(6)(w)was added.

关 键 词：Al_(2)O_(3)-CaO系隔热浇注料 CA_(6) 力学性能 抗渣性能 

分 类 号：TQ175.732[化学工程—硅酸盐工业]