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Fe2O3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Fe2O3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TiO2的有效富集,为钙钛矿与钛辉石的浮选分离创造了条件。
Abstract:
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 Fe2O3 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% Fe2O3 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 TiO2 in titanium-bearing blast furnace slag and is beneficial to the separation of titanaugite and perovskite.
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