Coal combustion used by the Combined heat and power plants (CHPs) generates solid
wastes-coal fly ash (CFA). Up to 22% of the total electricity supply in Russian is coal …

Clays are abundant minerals containing from 15 to 40% w/w of alumina that can be
extracted using various processes. Laboratory tests were conducted to verify if alumina can …

The rapid development of the global alumina industry has led to a considerable increase in
the production alumina and processing of alumina from non‐bauxitic sources. Lampang …

Alumina was extracted from oil shale ash which is a solid by-product of oil shale processing.
A Box–Behnken statistical design was used to optimize the factors affecting the extraction …

Coal is a major contributor to power and heat generation in the United States. According to
economic forecasts coal mining and consumption as fuel will increase through 2010 …

Coal gangue is mainly composed of SiO2, Al2O3 and other components. It is a huge reserve
of aluminum and silicon resources. The coal gangue stockpiles in China is more than 5 …

The process of activating coal spoil (CS) in order to recover aluminum as a high value
product was investigated. The CS was first characterized by X-ray fluorescence (XRF), X-ray …

This study investigated the cooling crystallization of aluminum sulfate to explore the basic
data for the recovery of aluminum resources from coal spoil. Cooling crystallization process …

Colliery spoil was investigated as a suitable feed material for the production of alumina from
domestic resources. In this paper, the precipitation of aluminium chloride hexahydrate …

Bauxite is heterogeneous material principally composed of aluminum oxide minerals and
found in all continents. It is being used in chemical, cement, refractory, abrasive, fertilizer …