“钙化-碳化”法处理高铁铝土矿过程中铝铁解离行为

doi:10.12068/j.issn.1005-3026.2018.03.010

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (3): 351-356.DOI: 10.12068/j.issn.1005-3026.2018.03.010

“钙化-碳化”法处理高铁铝土矿过程中铝铁解离行为

张伟光，张廷安，吕国志，郭芳芳

(东北大学多金属共生矿生态化利用教育部重点实验室，辽宁沈阳110819)

收稿日期:2016-10-21 修回日期:2016-10-21 出版日期:2018-03-15 发布日期:2018-03-09
通讯作者: 张伟光
作者简介:冯明杰(1971-)，男，河南禹州人，东北大学副教授; 王恩刚(1962-)，男，辽宁沈阳人，东北大学教授，博士生导师.张伟光(1984-)，男，山东邹平人，东北大学讲师，博士；张廷安(1960-)，男，河南周口人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51171041).国家自然科学基金资助项目(51504059)；中央高校基本科研业务费专项资金资助项目(N162504016).

Dissociation Behavior of Al-Fe in the “Calcification-Carbonization” Process for High-Iron Bauxite

ZHANG Wei-guang， ZHANG Ting-an， LYU Guo-zhi， GUO Fang-fang

Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education， Northeastern University， Shenyang 110819， China.

Received:2016-10-21 Revised:2016-10-21 Online:2018-03-15 Published:2018-03-09
Contact: ZHANG Ting-an
About author:-
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摘要/Abstract

摘要： 针对高铁一水硬铝石矿拜耳法工艺过程中铝铁难以解离的难题，提出“钙化-碳化-还原提铁”工艺方法，有效提取其中铝铁有价金属.利用纯物质合成铁铝水化石榴石相，研究其在“钙化-碳化-还原提铁”整个工艺过程中的转化行为，为含铁铝资源中铝铁的有效解离和综合回收提供理论基础.实验结果表明:在Na₂O-Al₂O₃-CaO-SiO₂-Fe₂O₃-H₂O体系中，铁铝水化石榴石相可在483~533K的温度范围内生成，且其性质相对稳定.碳化过程铁铝水化石榴石相可全部分解，生成碳酸钙相、硅酸钙相、三氧化铁相以及少量的水化石榴石相.同时碳化渣经溶铝后，其中52.7%的氧化铝可被提取;尾渣经煤粉还原后其铁金属化率可达77.2%.

关键词: 钙化-碳化法, 高铁一水硬铝石矿, 铁铝水化石榴石, 铝铁解离, 溶铝

Abstract: Aiming at dissociation problem of Al-Fe in hydrometallurgical extraction process for high-iron diaspore bauxite， “calcification-carbonization-reducing iron” method was proposed for effectively extracting valuable metal Al and Fe. Andradite-grossular hydrogarnet was synthetized by pure material， and the transformation behavior in novel technology was investigated for effective dissociation and comprehensive recovery of Al-Fe from high-iron bauxite. The results showed that the andradite-grossular hydrogarnet is synthetized in the range of 483~533K in Na₂O-Al₂O₃-CaO-SiO₂-Fe₂O₃-H₂O system， in which chemical property is relatively stable. In the carbonization process， andradite-grossular hydrogarnet is decomposed entirely， producing CaCO₃， Ca₂SiO₄， Fe₂O₃ and a little grossular hydrogarnet. Moreover， 52.7% of Al₂O₃ is extracted in dissolving alumina process and 77.2% of Fe is reduced in the directly reducing iron process.

Key words: calcification-carbonization method, high-iron diaspore bauxite, andradite-grossular hydrogarnet, Al-Fe dissociation, dissolving alumina

中图分类号:

TF821

张伟光，张廷安，吕国志，郭芳芳. “钙化-碳化”法处理高铁铝土矿过程中铝铁解离行为[J]. 东北大学学报:自然科学版, 2018, 39(3): 351-356.

ZHANG Wei-guang， ZHANG Ting-an， LYU Guo-zhi， GUO Fang-fang. Dissociation Behavior of Al-Fe in the “Calcification-Carbonization” Process for High-Iron Bauxite[J]. Journal of Northeastern University Natural Science, 2018, 39(3): 351-356.

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“钙化-碳化”法处理高铁铝土矿过程中铝铁解离行为

Dissociation Behavior of Al-Fe in the “Calcification-Carbonization” Process for High-Iron Bauxite

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