含碳铬矿粉微波加热体还原显微矿相结构的研究  

Microstructure study of voluminal reduction on chromite ore fines containing coal heated by microwave

作　　者：陈津[1] 张猛[1] 赵晶[1] 石巨岩[1] 周剑雄[2] 

机构地区：[1]太原理工大学材料科学与工程学院冶金工程系,山西太原030024 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《电子显微学报》2008年第1期26-33,共8页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金和上海宝钢集团公司联合资助项目(No.50475083)~~

摘　　要：本文研究了含碳铬矿粉在C∶O原子摩尔比为0.84、CaO∶SiO2分子摩尔比为0.39条件下微波加热体还原物料的显微矿相结构。在温度为1000℃、1100℃、1200℃、1300℃(大气压力下且无保护气氛)时,还原物料的显微矿相结构主要为铬矿微细热碎裂还原结构和矿颗粒周围的渣相结构,显微热碎裂还原结构随温度的提高而加剧。被还原的铬矿颗粒由最初边部微细热碎裂还原结构扩展到整体热碎裂还原崩解结构,且金属CrFe相中的Fe随着温度的提高而增加。在1300℃时,由于碳量的不足,导致金属CrFe相局部氧化,还原率降低。The microstructure of voluminal reduction on .chromite ore fines containing coal （C：O = 0.84, CaO： SiO2 = 0.39） heated by microwave were studied in the paper. At the temperature of 1 000℃, 1100℃, 1 200℃ and 1 300℃（ at atmospheric pressure without protective gas）, the mierostruetures of voluminal reduction on chromite ore fines containing coal heated by microwave consisted mainly of the fine thermic fractured reduction structure of chromite ore and the first slag phase structure. The fine thermic fractured reduction structures dominated with the increase of temperature. Chromite ore fines fracture initially from the external fine flaws finally to entire bulk as a result of thermie fracture and Fe in metallic CrFe phase increased with temperature rising. Finally metallic CrFe phase may be oxidized because of the lack of coal at high temperature of 1 300℃ .

关 键 词：微波加热 含碳铬铁矿粉 体还原 显微矿相结构 

分 类 号：TF791[冶金工程—钢铁冶金]