Thermal and Mechanical Activation in Acid Leaching Processes of Non-bauxite Ores Available for Alumina Production-A Review

被引:42
作者
Barry, Thierno Saidou [1 ]
Uysal, Turan [2 ]
Birinci, Mustafa [2 ]
Erdemoglu, Murat [2 ]
机构
[1] Laval Univ, Dept Min Met & Mat Engn, Quebec City, PQ G1V 0A6, Canada
[2] Inonu Univ, Dept Min Engn, Malatya, Turkey
关键词
Alumina; Non-bauxites ores; Acid leaching; Thermal activation; Mechanical activation; COAL FLY-ASH; KAOLINITE DISSOLUTION; CLAY-MINERALS; EXTRACTING ALUMINA; ROOM-TEMPERATURE; RATES; DECOMPOSITION; RECOVERY; PH; PYROPHYLLITE;
D O I
10.1007/s42461-018-0025-7
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
The rapid development of the global alumina and aluminum industry is straight coupled with the demands and the needs of these materials. Nowadays, the only well-known accessible resources to produce alumina and aluminum are bauxite ores. But bauxite ores are limited, and the remaining exploitable reserves do not have high contents in alumina. In countries where there is little or no bauxite reserves or where the recovery of existing bauxite ores to produce alumina with the Bayer process are not economic, alternative resources for alumina have been explored. The most attractive resources for replacing bauxites are aluminosilicate clay minerals and coal fly ash. The important processes developed for the recovery of alumina from these sources are acid leaching and alkaline leaching processes. The acid leaching is known as the most efficient in which thermal and mechanical activation are included for improving the performance of the process. The objective of this review is to give a comprehensive insight on the production of the alumina from thermally or mechanically activated clays and coal fly ash by hydrochloric, sulfuric, and nitric acid leaching processes.
引用
收藏
页码:557 / 569
页数:13
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