六元熔融还原渣黏度的分析  

Analysis on the viscosity of six different compound smelting reduction slag

作　　者：施哲[1] 熊洪进[2] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]北满特殊钢有限责任公司技术中心,齐齐哈尔161041

出　　处：《重庆大学学报（自然科学版）》2014年第5期37-45,共9页Journal of Chongqing University

基　　金：云南省教育厅科学研究基金项目(ZD2010001)

摘　　要：结合高效脱磷能力的熔融还原冶炼惠民高磷铁矿工艺及 HIsmelt熔融还原炼铁技术的特点，选取 CaO-MgO-FeO-Al2 O3-SiO2-P2 O5六元熔渣作为研究对象，其熔渣成分为：二元碱度R（CaO／SiO2）0．8～1．4，Al2 O3质量分数为6．4％～15．4％，P2 O5质量分数为0～3％、MgO、FeO质量分数分别为4％、6％，采用纯化学试剂配制熔渣。借助扫描电子显微镜对炉渣矿物组成和微观结构进行研究，采用RT W-10熔体物性综合测试仪研究熔渣成分的变化对黏度产生的影响。研究表明：该熔渣矿相结构主要以黄长石（钙铝黄长石、钙镁黄长石）为主，呈方形状、粗大骨架状结构。当P2 O5或Al2 O3质量分数一定时，随着碱度的提高，熔渣的黏度降低；当碱度或P2 O5质量分数一定时，熔渣的黏度随Al2 O3质量分数的增加而增大；当碱度或A l2 O3质量分数一定时，黏度均随着P2 O5质量分数的增加而提高。In combination with Huimin high-phosphorus iron smelted by smelting reduction and HIsmelt ironmaking technology ,w hich have the advantages of high efficient dephosphorization ,CaO-SiO2-Al2 O3-MgO-FeO-P2 O5 slags with basicity R （mass ratio of CaO to SiO2 ）ranging from 0 .8 to 1 .4 ,Al2 O3 ranging from 6 .4% to 15 .4% ,P2 O5 ranging from 0 to 3% and the content of MgO and FeO fixed as 4% and 6%respectively ,are studied .The slags are synthesized by reagent grade .The mineral composition and microstructure of the slags are studied with scanning electron microscope and the effects of changes in the composition of smelting reduction slags on its viscosity are studied by RTW-10 melt comprehensive physical properties measuring apparatus .Results show that the mineral structure of slags are mainly composed of melilite（gehlenite and akermanite） ,w hich is characterized by square and thick skeleton form .T he viscosity decreases with the increasing of the slag basicity at fixed P2 O5 or Al2 O3 mass fraction ,increases with the increasing of Al2 O3 mass fraction at fixed slag basicity or P2 O5 mass fraction ,and increases with the increasing of P2 O5 mass fraction at fixed slag basicity or Al2 O3 mass fraction .

关 键 词：熔融还原 熔渣 黏度 高磷铁矿 

分 类 号：TF557[冶金工程—钢铁冶金]