Resource-saving technologies in the processing ofnepheline ores by sintering

Abstract

To solve ecological problems in alumina production, ecological measures were implemented to reduce the consumption of mineral natural resources and by involving secondary technogenicmaterials in the production. In the processing ofnepheline ores, a number of technologies were tested and implemented into production for the introduction of various additives of technogenic raw materials into the raw alumina charge: spent chamotte refractory bricks, ferrotitanium production slag, and combined heat and power plant ash. The introduction of technology for processing oftechnogenic raw materials provided the use of spent chamotte bricks of more than 70,000 tons, while saving natural raw materials: nepheline ore of about 42,000 tons. In addition to saving mineral resources, work was carried out to reduce waste water discharges into open water basin and reduce the water intake of treated water for production needs. For this purpose, the technological equipment for water supply of the combined heat and power plant was replaced. As a result of the introduction of new cooling towers, the waste water discharges into an open water basin was eliminated and the intake of treated water from the river was reduced by 40.07 millionm3per year.