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
曹丽 1朱奎松 2唐建杰 1王军 1赵英涛 1程相魁 2索绪洲3
作者信息
- 1. 钒钛资源综合利用四川省重点实验室,四川 攀枝花 617000
- 2. 钒钛资源综合利用四川省重点实验室,四川 攀枝花 617000;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
- 折叠
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1 600℃经硅热还原保温2h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、TiSi2、TiFeSi2 和TiMnSi2,但是微观组织结构中发现TiMnSi2 相并不单独存在,而是与TiFeSi2 和TiSi2 形成三相固熔体.
Abstract
ducts 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-tita-nium blast-furnace slag from a thermodynamic perspective.Ingredient calculations for silicon-thermal reduc-tion are then carried out from the perspectives of regulating the composition of the alloy after reduction and effi-ciently separating slag and metal.Based on the thermodynamic and ingredient calculation results,experimental re-search 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 1 600℃,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,TiSi2,TiFeSi2 and TiMnSi2.However,the microscopic organizational structure reveals that the TiMnSi2 phase does not exist independently but forms a ternary solid solution with TiFeSi2 and TiSi2.
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Key words
titania-bearing blast-furnace/silicothermic reduction/valuable metal recovery/alloy composition control引用本文复制引用
基金项目
国家自然科学基金(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)
出版年
2024
NETL
NSTL
维普
万方数据