Effect of Basicity and Alumina-Silica Ratio on Formation of Silico-Ferrite of Calcium and Aluminum  

作　　者：ZHANG Fang AN Sheng-li LUO Guo-ping WANG Yi-ci 

机构地区：[1]School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010,Inner Mongolia, China [2]School of Metallurgical and Ecological Engineering University of Science andTechnology Beijing, Beijing 100083, China)

出　　处：《Journal of Iron and Steel Research International》2012年第4期1-5,共5页

基　　金：Sponsored by Inner Mongolia Science Foundation of China(2009MS0702)

摘　　要：Baivumebo iron ore is special magnetite containing fluorine,kalium and sodium elements,and the main raw material for ironmaking of Baotou Iron and Steel（Group） Co.The effects of basicity and ratio of Al2O3 to SiO2（A/S） on the formation of silico-ferrite of calcium and aluminium（SFCA） in Baivumebo low silica sinters were studied by means of mini-sintering,XPF-500 optical mineralogical microscope and CSS-88000 electronic universal testing machine.The results show that it is beneficial to the formation of complex calcium ferrite to enhance the basicity of Baivumebo low silica sinters.The acicular SFCA-I was increased with the enhancing basicity and reached the peak at basicity 2.8,then the columnar or platy SFCA formed and the bonding strength decreased.Alumina is beneficial to the formation of acicular complex calcium ferrite in Baivumebo low silica sinters.But the residual unfused Al2O3 reagent came into being when A/S was 0.35,while complex calcium ferrite still remained to be acicular.There is a common rule about mineralogy components affected by basicity and ratio of A/S,that is,SFCA is increasing accompanied with hematite and porosity reduced,but the content of glass phase is stableBaivumebo iron ore is special magnetite containing fluorine,kalium and sodium elements,and the main raw material for ironmaking of Baotou Iron and Steel（Group） Co.The effects of basicity and ratio of Al2O3 to SiO2（A/S） on the formation of silico-ferrite of calcium and aluminium（SFCA） in Baivumebo low silica sinters were studied by means of mini-sintering,XPF-500 optical mineralogical microscope and CSS-88000 electronic universal testing machine.The results show that it is beneficial to the formation of complex calcium ferrite to enhance the basicity of Baivumebo low silica sinters.The acicular SFCA-I was increased with the enhancing basicity and reached the peak at basicity 2.8,then the columnar or platy SFCA formed and the bonding strength decreased.Alumina is beneficial to the formation of acicular complex calcium ferrite in Baivumebo low silica sinters.But the residual unfused Al2O3 reagent came into being when A/S was 0.35,while complex calcium ferrite still remained to be acicular.There is a common rule about mineralogy components affected by basicity and ratio of A/S,that is,SFCA is increasing accompanied with hematite and porosity reduced,but the content of glass phase is stable

关 键 词：Baivumebo iron concentrates Baivumebo low silica sinter SFCA BASICITY alumina-silica ratio 

分 类 号：TQ175.712[化学工程—硅酸盐工业] TG457.11[金属学及工艺—焊接]