The Use of Waste from the Processing of Copper-Zinc Concentrates of the East Kazakhstan Region in the Production of Non-Fired Refractory Composites

Abstract

Creating waste-free technologies for the production of materials with high physical and thermal properties for the lining structures of thermal units is among the important environmental issues. Studies have shown that the waste of processing copper-zinc concentrates – ferrite-calcium slag crushed to pass through a sieve No. 0063 (the sieve residue is 1.2 % max.) can be used as a finely ground component of an iron phosphate binder. Studies have shown that under normal curing conditions at one-day age, refractory concretes based on an iron phosphate binder acquire strength sufficient for stripping, transportation, and installation of structures. At 7-day age, they acquire final strength, the value of which is determined by the aggregate properties. The iron phosphate binder refractoriness is 1,300 °C, and the working temperature of the concrete lining using expanded clay as coarse aggregate is 1,000 °C.