论文部分内容阅读
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 effective recovery of titanium components from the titanium-containing blast furnace slag, the effects of different heat treatment conditions on the selective precipitation behavior of perovskite phases were investigated. By analyzing the characteristics of chemical composition and mineral composition, combining phase diagram theory and selective precipitation technique, the effects of Fe 2 O 3 addition amount, crystallization temperature, crystallization time and cooling rate on the enrichment of perovskite were explored. The results showed that when raw slag was added with 2.54% CaO as conditioning agent, the raw slag was pre-oxidized at 1 025 ℃ for 30 min, then mixed with 1% Fe 2 O 3 and melted at 1 470 ℃ for 60 min, then cooled at 0.5 ℃ / min To 1 320 ℃ and heated for 90 min. The amount of perovskite crystals in the modified slag finally obtained was 30.62% and the grain size was 63.17μm, which achieved the effective enrichment of TiO_2 in the titanium-bearing blast furnace slag. Flotation of ores and titanium dioxide flotation created the conditions.