直流电弧炉冶炼钛渣中元素分配的研究  

Element Distribution of Titanium Slag Smelted by DC Arc Furnace

作　　者：黄世弘[1] 雷霆[2] 韩丰霞[3] 周林[4] 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]昆明冶金高等专科学校,云南昆明650033 [3]昆明理工大学质量发展研究院,云南昆明650093 [4]云南冶金集团股份有限公司技术中心,云南昆明650031

出　　处：《稀有金属》2014年第2期283-289,共7页Chinese Journal of Rare Metals

基　　金：国家科技部国际合作项目(2007DFA71490)资助

摘　　要：借助多相、多成分体系中化学平衡计算法,对冶炼过程中钛、碳及伴生元素的分配行为进行了研究,并用生产结果加以验证,计算结果与实验结果较吻合。分析了配碳比(AIR)对Ti,C,Ca,Mg,Si,Al等元素分配的影响。结果表明:AIR对钛渣和铁水中元素的分配行为有重要的影响。随AIR的增加,钛渣中TiO2,MgO,CaO,Al2O3,SiO2的质量分数呈增加趋势,而FeO的质量分数呈降低趋势;金属中各元素的含量增加,表现为金属元素摩尔分数逐渐增加;参与还原TiO2和FeO的C量和固溶成为微量元素的C量增加,而AIR对参与还原Fe2O3的C量影响较小。富集在钛渣中的杂质有SiO2,MnO,V2O5。当AIR由120增加到134 kg·t-1时,钛渣中TiO2的质量分数由83.8%增加到91.77%,FeO的质量分数由14.7%降低到6.25%;铁水中铁的含量由6.25 kmol增加到7.08 kmol,碳的含量由0.97 kmol增加到1.09 kmol;参与还原TiO2和FeO的C量增加了约13%。可调整AIR来实现熔体中氧化物的选择还原。对钛渣还原冶炼过程中元素分配行为的研究,可实现对工艺的更好控制、提高钛渣品位。Based on chemical equilibrium calculation method in multi-phase, multi-component system, the distribution behavior of ti- tanium, carbon and associated elements during the smelting process was studied. The calculated results agreed well with the experimen- tal results. The effect of AIR （ anthracite to ilmenite ratio） on the distribution of Ti, C, Ca, Mg, Si and Al in slag and metal was ana- lyzed. The results showed that AIR was a significant factor. With the increase of AIR, the mass fraction of TiO2, MgO, CaO, Al2O3, SiO2 in slag increased, while the FeO content decreased. The content of each element in metal increased with AIR increasing, reflected in the increase of mole fraction. Most of the reducing agent was used to restore the TiO2 and FeO, while some C also acted as minority elements. However, the AIR on the amount of C in reducing Fe2O3 had little influence. The impurities enriched in the slag were SiO2, MnO, and V2O5. With the increase of AIR from 120 to 134 kg .t-1 , the mass fraction of TiO2 in slag increased from 83.8% to91.77% , FeO mass fraction decreased from 14.7% to 6.25%. Moreover, Fe in molten iron increased from 6.25 to 7.08 kmol, the carbon content changed from 0. 97 to 1.09 kmol. The amount of C participated in reducing TiO2 and FeO increased by about 13%. AIR could be controlled to achieve selective reduction of oxides in the melt. Study on allocation behavior of elements during titanium slag smelting reduction process could help to control the process and improve the slag taste.

关 键 词：元素分配 钛渣 还原冶炼过程 钛铁矿 

分 类 号：TF03[冶金工程—冶金物理化学] TF801.2