高钛型高炉渣硅热还原捕集有价金属元素的热力学计算和实验研究  

Thermodynamic Calculation and Experimental Study on the Recovery of Valuable Metal Elements from Titania-Bearing Blast-Furnace Slag by Silicothermic Reduction

作　　者：曹丽 朱奎松 唐建杰 王军 赵英涛 程相魁 索绪洲 CAO Li;ZHU Kuisong;TANG Jianjie;WANG Jun;ZHAO Yingtao;CHENG Xiangkui;SUO Xuzhou(Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province,Panzhihua 617000,Sichuan,China;College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,Sichuan,China;Application and Solar Technology Integration Sichuan Provincial Key Laboratory of University,Panzhihua 617000,Sichuan,China)

机构地区：[1]钒钛资源综合利用四川省重点实验室,四川攀枝花617000 [2]攀枝花学院钒钛学院,四川攀枝花617000 [3]太阳能技术集成及应用推广四川省高校重点实验室,四川攀枝花617000

出　　处：《昆明理工大学学报（自然科学版）》2024年第1期1-10,36,共11页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(U1960101);四川省应用基础研究项目(2021YJ0548);攀枝花学院培育项目(2023PY05);太阳能技术集成及应用推广四川省高校重点实验室开放基金(TYNSYS-2023-Y-01)。

摘　　要：为了探索攀枝花地区高钛型高炉渣综合利用新途径,以攀枝花地区的高钛型高炉渣为研究对象,开展了高钛型高炉渣硅热制备高硅Ti-Si合金的实验研究.首先从热力学角度计算了高钛型高炉渣硅热还原有价金属氧化物的热力学条件;从还原后的合金成分调控和渣金高效分离等角度开展硅热还原的配料计算;以热力学和配料计算结果为依据,在高温箱式电阻炉内开展了高钛型高炉渣硅热还原的实验研究,探究了不同保温时间下的渣金分离效果和还原后合金组成物相.研究结果发现:高钛型高炉渣在1600℃经硅热还原保温2 h后能够获得较好的渣金分离效果;渣金分离后获得的合金中主要物相为Si、TiSi_(2)、TiFeSi_(2)和TiMnSi_(2),但是微观组织结构中发现TiMnSi_(2)相并不单独存在,而是与TiFeSi_(2)和TiSi_(2)形成三相固熔体.In order to explore a new pathway for the comprehensive utilization of high-titanium blast-furnace slag in Panzhihua,this study focuses on the high-titanium blast-furnace slag in the Panzhihua region and conducts experimental research on the silicon-thermal preparation of high-silicon Ti-Si alloy.The experiment first calculates the thermodynamic conditions of silicon-thermal reduction of valuable metal oxides in high-titanium blast-furnace slag from a thermodynamic perspective.Ingredient calculations for silicon-thermal reduction are then carried out from the perspectives of regulating the composition of the alloy after reduction and efficiently separating slag and metal.Based on the thermodynamic and ingredient calculation results,experimental research on silicon-thermal reduction of high-titanium blast-furnace slag is conducted in a high-temperature box-type resistance furnace,exploring the effects of different insulation times on slag-metal separation and the phase composition of the alloy after reduction.The research findings reveal that at 1600℃,the high-titanium blast-furnace slag can achieve a good slag-metal separation effect after a 2-hour silicon-thermal reduction.The main phases in the alloy obtained after slag-metal separation are Si,TiSi_(2),TiFeSi_(2) and TiMnSi_(2).However,the microscopic organizational structure reveals that the TiMnSi_(2) phase does not exist independently but forms a ternary solid solution with TiFeSi_(2) and TiSi_(2).

关 键 词：高钛型高炉渣 硅热还原 有价金属回收 合金成分调控 

分 类 号：X75[环境科学与工程—环境工程] TF803[冶金工程—有色金属冶金]