摘要
从含钛高炉渣中绿色高效提取钛资源是实现高附加值钛制品持续开发的有力保障,目前与含钛氧化物渣系相关的关键热力学数据匮乏,严重制约了相关提钛工艺的开发。本文基于典型含钛高炉渣成分及矿物特征,结合FactSage 8.2热力学软件的“Phase Diagram”模块和“FactPS”、“FToxid”数据库,计算分析了含钛矿物在高炉不同区域还原过程中钛赋存相的变化规律,并进一步计算分析了1400~1600℃下0.21~10^(-18)atm氧分压范围内CaO-SiO_(2)-TiO_(x)渣系平衡相的演变规律。结果表明,当温度一定时,随着氧分压的降低,液相区范围先增大后减小,钛的氧化物被逐级还原;当氧分压一定时,随着温度的增加,液相区逐渐变大,液相与钙钛矿两相共存区随温度升高先小幅增大后小幅缩小,且向w(CaO)/w(SiO_(2))比增大的方向移动,液相与金红石两相共存区先大幅增大后小幅缩小。本文结果对于深入理解含钛赋存相在不同工艺参数下的演变规律,进而开发更加绿色高效钛资源提取工艺具有重要意义。
The green and efficient extraction of titanium resources from titania-bearing blast furnace slag is a powerful guarantee for the continuous development of high-value-added titanium products.However,there is a lack of key thermodynamic data related to titania-bearing oxide slag systems,which seriously restricts the development of related titanium extraction processes.Based on the composition and mineral characteristics of typical titania-bearing blast furnace slag,combined with the“Phase Diagram”module of FactSage 8.2 thermodynamic software and the“FactPS”and“FToxid”databases,the evolution of equilibrium coexisting phases was determined in the temperature range of 1400~1600℃and the oxygen partial pressure range of 0.21~10^(-18) atm in the present work.The results show that when the temperature is constant,as the oxygen partial pressure decreases,the range of the liquid phase region first increases and then decreases,and titanium is reduced step by step;While the oxygen partial pressure is constant,as the temperature increases,the liquid phase region gradually enlarged,the liquid phase-CaTiO_(3) first increases slightly and then decreases slightly with the increase of temperature,and moving in the direction of increasing w(CaO)/w(SiO_(2))ratio.The liquid phase-TiO_(2) first increases greatly and then decreases slightly.The research results are important for understanding the evolution of titania-bearing phases under different process parameters,and then developing a more environmentally friendly and more efficient titanium resource extraction process.
作者
丁华清
姜成龙
邱玉超
陈尚武
石俊杰
李建中
DING Huaqing;JIANG Chenglong;QIU Yuchao;CHEN Shangwu;SHI Junjie;LI Jianzhong(Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《中国有色冶金》
CAS
北大核心
2024年第4期132-141,共10页
China Nonferrous Metallurgy
基金
国家自然科学基金青年科学基金项目(No.52204310)
中国博士后科学基金第68批面上项目(No.2020M570967)
中国博士后科学基金第2批特别资助(站前)(No.2020TQ0059)
辽宁省自然科学基金面上项目(2021-MS-083)
中央高校基本科研业务费专项资金(N2125010)
安徽工业大学冶金减排与资源循环利用教育部重点实验室(No.JKF22-02)
材料各向异性与织构教育部重点实验室资助。
