Effect of Al_(2)O_(3) content on the viscosity and structure of CaO-SiO_(2)-Cr_(2)O_(3)-Al_(2)O_(3) slags  

作　　者：Fang Yuan Zheng Zhao Yanling Zhang Tuo Wu 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2022年第8期1522-1531,共10页矿物冶金与材料学报（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.U1960201);the National Key R&D Program of China(No.2019YFC 1905701).

摘　　要：The effect of Al_(2)O_(3) content on the viscosity and structure of CaO-SiO_(2)-Cr_(2)O_(3)Al_(2)O_(3) slags was investigated to facilitate recycling of Cr in steelmaking slags.The slags exhibit good Newtonian behavior at high temperature.The viscosity of acidic slag first increases from 0.825 to 1.141 Pa·s as the Al_(2)O_(3) content increases from 0 to 10wt%and then decreases to 1.071 Pa·s as the Al_(2)O_(3) content increases further to 15wt%.The viscosity of basic slag first increases from 0.084 to 0.158 Pa·s as the Al_(2)O_(3) content increases from 0 to 15wt%and then decreases to 0.135 Pa·s as the Al_(2)O_(3) content increases further to 20wt%.Furthermore,Cr_(2)O_(3)containing slag requires less Al_(2)O_(3) to reach the maximum viscosity than Cr_(2)O_(3)free slag;the Al_(2)O_(3) contents at which the behavior changes are 10wt%and 15wt%for acidic and basic slags,respectively.The ac-tivation energy of the slags is consistent with the viscosity results.Raman spectra demonstrate that[AlO_(4)]tetrahedra appear initially and were replaced by[AlO_(6)]octahedra with further addition of Al_(2)O_(3).The dissolved organic phosphorus content of the slag first increases and then de-creases with increasing Al_(2)O_(3) content,which is consistent with the viscosity and Raman results.

关 键 词：VISCOSITY STRUCTURE Cr-containing slag Raman spectra 

分 类 号：TF703[冶金工程—钢铁冶金]