The article investigates the temperature regime and the amount of heat required for sintering a mixture obtained from industrial waste (dump slag, flotation tailings) with the addition of natural clay. The chemical composition of industrial waste (slag, dump, flotation tailings) and natural clay, which are suitable for use as raw material for the production of Portland cement and other building materials, have been investigated. Utilization of man-made waste (Kadamzhai antimony plant) will help improve the environmental situation in the region, and on the other, reduce material costs of production to obtain new products.

This article investigates the chemical composition of industrial waste (dump slag and flotation tailings). This study, in contrast to previous studies, was carried out by chemical, atomic emission, X-ray fluorescence methods. Valuable rare earth chemical elements (ytterbium, yttrium, lanthanum, scandium), valuable chemical elements (antimony, titanium, vanadium, tungsten, niobium, indium, germanium, gallium, tantalum, molybdenum, strontium, beryllium, zirconium, cobalt) and others have been determined. The oxides of elements (SiO2, Al2O3, MgO, CaO, Fe2O3, Na2O, K2O, S, FeO) have been investigated. Toxic elements (arsenic, cadmium, tin, lead). These studies were carried out with the aim of using man-made waste in various sectors of the national economy for the disposal of man-made waste and to improve the environmental situation in the region and reduce material costs for the production of new products.

The article discusses methods for extracting rare earth elements from waste (slag) of the Kadamzhai Antimony Combine. For this, electrically activated water was used with the addition of 50% sulfuric acid in an amount of 3–10% in the ratio S:L 1:1 at a temperature of 40–80 ℃. The content of rare earth elements in the solution was determined photometrically in a medium with pH=2.2 by adding arsenazo (a reagent for concentration, separation and determination of more than 40 elements) at a wavelength of 680 nm with respect to the reference solution, as a result of which it was found that the total mass of rare earth elements was 96 mg/l.