首页|改性含钛高炉渣中金红石的选择性分离及浸出机理研究

改性含钛高炉渣中金红石的选择性分离及浸出机理研究

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含钛高炉渣的综合利用是冶金领域亟待解决的关键问题.针对该问题,以改性含钛高炉渣(含钛高炉渣在高温下经过氧化硅、压缩空气改性处理得到的炉渣)为原料,通过重选-碱浸-酸浸工艺来实现金红石晶体的选择性分离,获得高品质的人造金红石.具体研究各工艺参数对重选实验、碱浸实验、酸浸实验的影响.结果表明,较佳的工艺条件为:-150μm改性渣占比79.53％、冲程14 mm、冲次360 times/min;碱浸温度95 ℃、碱浸时间90 min、NaOH浓度3.0 mol/L;酸浸温度65 ℃、酸浸时间60 min和HC1浓度3.0 mol/L.产品金红石的TiO2含量为98.20％,MgO和CaO总含量为0.47％,是氯化钛白的优质原料.此外,通过电位-pH图明晰了碱浸-酸浸实验的浸出机理.
Study on Selective Separation and Leaching Mechanism of Rutile from Modified Titanium-bearing Blast Furnace Slag
The comprehensive utilization of titanium-bearing blast furnace slag is a key issue that urgently needs to be solved in the metallurgical field.In this work,modified titanium-bearing blast furnace slag(The slag was obtained by modifying titanium-bearing blast furnace slag with silicon oxide and compressed air at a high temperature.)was used as raw material.Selective separation of rutile was achieved through shaker sorting-alkali leaching-acid leaching,obtaining high-quality synthetic rutile.The effects of various parameters on the shaker sorting,alkali leaching,and acid leaching were studied.The optimal experiment conditions were the-150 μm modified slag mass fraction of 79.53％,stroke 14 mm,vibration frequency 360 times/min,alkali leaching temperature 95 ℃,alkali leaching time 90 min,NaOH concentration 3.0 mol/L,acid leaching temperature 65 ℃,acid leaching time 60 min,and HC1 concentration 3.0 mol/L.The TiO2 content of rutile was 98.20％,and the total content of CaO and MgO was 0.47％.indicating that the rutile was a high-quality raw material for chloride titanium white.In addition,the mechanism of alkali leaching-acid leaching was clarified through the Pourbaix diagram.

modified titanium-bearing blast furnace slagshaker sortingalkali leachingacid leachingsynthetic rutile

韩吉庆、张力、殷红梅、冯秋平、杨明飞

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江苏电子信息职业学院数字装备学院,江苏淮安 223003

东北大学冶金学院,沈阳 110819

改性含钛高炉渣 重选 碱浸 酸浸 人造金红石

淮安市基础研究计划项目江苏电子信息职业学院自然科学研究项目淮安市创新服务能力建设计划项目淮安市自然科学研究计划项目江苏省高校优秀科技创新团队资助项目淮安市基础研究计划(联合专项)项目

HABZ202320JSEIY2023002HAP202303HABZ202222HABL2023027

2024

10.3969/j.issn.2095-1744.2024.10.011

有色金属工程
北京矿冶研究总院

有色金属工程

CSTPCD北大核心
影响因子：0.432
ISSN：2095-1744
年,卷(期)：2024.14(10)