Technogenic wastes of Kovdor GOK — raw resources for unshaped materials

The article is devoted to the development of unshaped materials from industrial waste. Refractory concrete is the most popular, it consists from filler, binder and additives, which is harden under normal conditions and has limited shrinkage at application temperature. Concretes from the technogenic wastes of the Kovdor GOK using magnesium phosphate cement were obtained. As a result of studies, the grain composition of the charge was selected, the ratio of filler and binder to improve the structural properties of concrete was established, the effect of the composition and temperature of thermal treatment of concrete on the physical and technical properties were determined. The replacement of traditional fired refractories with non-fired concretes makes it possible to speed up the construction and repair of thermal units, to adopt fundamentally new technical solutions in the development of furnace designs and leads to an increase in their operational characteristics. Utilization of such waste will lead to a qualitatively new use of non-renewable natural resources, the elimination of sources of environmental pollution and the reclamation of lands occupied by waste.