A Review of Research on Alumina Extraction from High-Alumina Fly Ash and a New Method for Preparing Alumina by Electrotransformation

When bauxite and aluminaAlumina resources are limited, high-alumina fly ashHigh-alumina fly ash becomes a potential aluminumAluminum resource. The comprehensive utilizationComprehensive utilization of high value-added elements in high-alumina fly ashHigh-alumina fly ash is of great significance to resource circulation. In order to solve the difficult comprehensive utilizationComprehensive utilization of valuable components in high-aluminaAlumina ash problem, the existing traditional research methods of high-aluminaAlumina ash are firstly summarized and compared in this paper. Following the review, a new method for the treatment of high-alumina fly ashHigh-alumina fly ash by electrotransformationElectrotransformation is proposed. This new method can realize reductionReduction in slag volumes, with no waste acid, no alkali input required. It can be concluded that this new method can effectively treat high-alumina fly ashHigh-alumina fly ash and realize the comprehensive utilizationComprehensive utilization of valuable components of high-alumina fly ashHigh-alumina fly ash .