摘要
为了实现攀钢含钛高炉渣中钛组分的有效回收,研究了将钙钛矿作为钛的富集相时,不同热处理条件对钙钛矿相选择性析出行为的影响。通过分析化学组分及矿物组成特点,结合相图理论,采用选择性析出技术,探索了Fe_2O_3加入量、结晶温度、结晶时间及降温速度对钙钛矿富集效果的影响。试验结果表明,原渣加入2.54%CaO为调整剂,经1 025℃预氧化30 min后,再与1%的Fe_2O_3混匀,在1 470℃下熔融60 min,然后以0.5℃/min降温速率降至1 320℃并恒温90 min,最终所获得的改性渣中钙钛矿结晶量为30.62%、晶粒大小为63.17μm,实现了含钛高炉渣中TiO_2的有效富集,为钙钛矿与钛辉石的浮选分离创造了条件。
In order to achieve the effective recovery of titanium component in the titanium-blast furnace slag from Pangang Group Co.,Ltd.,the effect of different heat treatment conditions on selective precipitation behavior of perovskite as the enriched phase of titanium were studied in this paper. Through analyzing the chemical components and mineral compositions of the slag,the effects of Fe_2O_3 addition amount,crystallization temperature and period,and cooling rate on the enrichment of perovskite were explored using selective precipitation technology integrating phase diagram theories. It is shown that with 2. 54%CaO added as regulator and pre-oxidation at 1 025 ℃ for 30 min,then with 1% Fe_2O_3 mixed and smelting at 1 470 ℃ for 60 min,and cooling to 1 320 ℃ at a speed of 0. 5 ℃ / min and insulation for 90 min,the modified slag having 30. 62% of perovskite with 63. 17 μm of crystal size can be finally obtained,which realizes the efficient enrichment of TiO_2 in titanium-bearing blast furnace slag and is beneficial to the separation of titanaugite and perovskite.
出处
《钢铁钒钛》
CAS
北大核心
2016年第2期8-14,共7页
Iron Steel Vanadium Titanium
基金
固体废物处理与资源化教育部重点实验室开放基金项目(13zxsk06)
四川省科技厅应用基础研究项目(2014JY0124)
关键词
含钛高炉渣
钙钛矿
相图
选择性析出
热处理
titanium-bearing blast furnace slag
perovskite
phase diagram
selective enrichment
heat treatment
