Use of Coal-Mining and Processing Wastes in Production of Bricks and Fuel for Their Burning

Abstract

The research results of the material, chemical and mineral compositions of waste coal from the processing plant Abashevskaya and carbonaceous argillites from the Korkino coal mine are provided. The technology of waste coal recycling is offered that can be used in the production of coal fuel for bricks burning and preparation of the raw material for ceramics manufacture. On the basis of the pilot plant tests it is shown that the pneumatic waste classification allows coal residues to be extracted from argillites and a stable ceramic raw material to be obtained for the brick manufacture. Such complex processing of waste coal does not only provide a significant expansion of the raw material base for the production of building materials and generation of additional energy, but will also help to solve environmental problems and improve the environmental situation in industrial regions. Due to the introduction of the patented method of production and rational compositions of the granulated molding materials there is an increase in operational properties of ceramic wall materials produced from the waste coal after secondary processing. The study of thin sections using a polarizing microscope and SEM was conducted to examine the structures of the obtained ceramic cork. It was established that high physical and mechanical properties of the brick were achieved by forming the matrix structure of a ceramic crock, intensive generation of the glass phase at the interphase boundary of the composite material and the temperature reduction of processes of a solid-phase sintering during burning.