钢铁钒钛2025，Vol.46Issue(3)：32-40,9.DOI:10.7513/j.issn.1004-7638.2025.03.006
兰炭和焦粉还原活性对比及在含钛高炉渣碳化过程的应用
Comparison of the reducing activity of coke powder and semi-coke and its application in the carbonization process of Ti-bearing blast furnace slag
摘要
Abstract
In the process of titanium extraction from Ti-bearing blast furnace slag by"high temperature carbonization and low temperature chlorination",high temperature carbonization is very critical and important.The carbonaceous reducing agent used in the high temperature carbonization process dir-ectly affects the cost of the process and the carbonization rate of titanium dioxide in the blast furnace slag,so the selection of more high-quality and low-cost carbonaceous reducing agent is one of the im-portant means to improve the quality and reduce the cost of high temperature carbonization process.In this study,semi-coke and coke powder with different particle size ranges were obtained by grinding and sieving as raw materials.By XRD,TGA,BET and other analytical methods,the difference of the redu-cing activity between semi-coke and coke powder was studied.The particle size of semi-coke corres-ponding to coke powder with the same reduction reaction activity was proposed,and the industrial ap-plication test was carried out.The results show that the graphitization degree of semi-coke is much lower than that of coke powder.In the range of conversion rate of 0.3～0.8,the average activation en-ergy of semi-coke is lower than that of coke powder.When the particle size is more than 0.150 mm,the specific surface area of semi-coke is greater than that of coke powder,contributing to its higher reactiv-ity than that of coke powder.Based on these,it is proposed that the particle size of semi-coke should be collaboratively controlled in the range of 1～2 mm and 0.150～1 mm.The industrial test results reveal that the power consumption per ton of slag and carbonization rate are the same as those of coke powder with particle size distribution currently used,when this above range-controlled semi-coke is applied to the high temperature carbonization process of Ti-bearing blast furnace slag.关键词
含钛高炉渣/兰炭/焦粉/高温碳化/还原活性Key words
Ti-bearing blast furnace slag/semi-coke/coke powder/high temperature carbonization/re-duction activation分类
矿业与冶金引用本文复制引用
路瑞芳,邱淑兴,赵青娥,吕学明,黄家旭,刘亚东..兰炭和焦粉还原活性对比及在含钛高炉渣碳化过程的应用[J].钢铁钒钛,2025,46(3):32-40,9.基金项目
国家自然科学基金(编号:52104323) （编号:52104323）
中央在川高校院所重大科技成果转化项目(编号:2022ZHCG0123). （编号:2022ZHCG0123）
