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 …

High-silica bauxite is not used to obtain sandy-grade alumina owing to its low alumina/silica
ratio (μ Si< 3). Acidic methods, such as the use of HCl and NH 4 HSO 4, show promise for …

The leaching kinetics of alumina extraction from coal gangue with hydrochloric acid was
investigated. The effects of calcination activation temperature and leaching conditions on the …

Red mud is a hazardous waste of the alumina industry that contains high amounts of iron,
aluminum, titanium and rare-earth elements (REEs). One of the promising methods for the …

Research into the solvent extraction of iron (III) from a chloride solution after bauxite HCl
leaching by neutral oxygen-containing extractants and their mixtures were studied and the …

Bauxite residue is a high-iron waste of the alumina industry with significant contents of
scandium, aluminum, and titanium. This study focuses on the recovery of Sc, Al, Ti, and Si …

This work presents a semi-smelting reduction and magnetic separation process for the
recovery of iron and alumina slag from iron rich bauxite ore. The effect of the process …

With the widespread promotion of coal gasification technology, the mass-produced solid
waste coal gasification slag has caused serious threat to the environment. Coal gasification …

Extracting valuable elements from coal gangue is an important method for the utilization of
coal gangue. In order to obtain the suitable technological conditions and the acid leaching …

The decrease in the availability of high-quality bauxites makes the processing of high-silica
raw materials inevitable, and in this regard, it is necessary to develop acid–salt methods …