Wettability and corrosion behavior between alkaline slag from sodium smelting of vanadium-titanium magnetite and refractory substrates  

作　　者：Fei Zhao Zhi-wei Bian Hong-xin Zhao De-sheng Chen Zhang-fu Yuan Yu-lan Zhen Li-na Wang Tao Qi 

机构地区：[1]Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China [2]National Engineering Research Center of Green Recycling for Strategic Metal Resources,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China [3]Hebei Zhongke Tongchuang Vanadium&Titanium Technology Co.,Ltd.,Hengshui 053000,Hehei,China

出　　处：《Journal of Iron and Steel Research International》2024年第6期1399-1410,共12页

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDC04010100);National Key Research and Development Program of China(Grant No.2018YFC1900500);the Special Project for Transformation of Major Technological Achievements in Hebei Province(Grant No.19044012Z);the Science and Technology Program of Hengshui(Grant No.2020016004B).

摘　　要：The sodium smelting of vanadium-titanium magnetite can achieve the comprehensive utilization of Fe,V,and Ti.However,the generation of alkaline slag during this process may cause damage to refractory materials.The wettability and corrosion behavior of alkaline slag on three types of refractory(MgO-C,SiC,and high alumina refractory)substrates were investigated at temperatures up to 1200℃.The effects of duration on the wettability of molten slag on SiC substrates were also investigated.Results showed that the high alumina refractory exhibited better wettability with the molten slag than the others,and thus,it is easier to be corroded.The results of scanning electron microscopy coupled with energy dispersive spectroscopy showed that MgO-C and high alumina refractory substrates were severely eroded.There was a visible and regular interfacial reaction layer between the slag and SiC refractory substrate,which was produced by the redox reaction between the metal oxides in the slag and the SiC refractory substrate.With the increase in holding time,the interface layer expands and silico-ferrite phases are generated at the interface.The redox reaction between Fe_(2)O_(3) and SiC substrate is the main reason for the corrosion.By comparing the differences in wettability and corrosion behavior between the alkaline slag from sodium smelting of vanadium-titanium magnetite and MgO-C,SiC and high alumina refractories,it is concluded that SiC refractory has good corrosion resistance to the slag.Iron oxides in the slag accelerate the oxidation rate of SiC refractory.

关 键 词：WETTABILITY Corrosion Alkaline slag-Contact angle Vanadium-titanium magnetite REFRACTORY 

分 类 号：TG1[金属学及工艺—金属学]