DEVELOPMENT OF TECHNOLOGIES FOR OBTAINING METAL POWDERS (IRON) FROM PRODUCTION WASTE AND STUDYING THEIR PROPERTIES
Abstract
The article discusses modern methods of obtaining iron powders, carried out their classification, analytical data of powders made from various types of raw materials. The kinetic regularities of the reduction of iron oxides are analyzed from the point of view of the adsorptionautocatalytic theory. The structure and mechanical properties of iron powders are considered. The morphology, structure, phase, and elementary composition of the mill scale of the Uzbek Metallurgical Plant are analyzed. Technology for the recovery of scale has been developed, including the following stages: drying at 250 -340C, grinding in a ball mill for 2 hours, magnetic separation, sieving through a 40 mesh sieve, mixing the charge, recovery for 2 hours in H2 at a temperature: I -zone -650-700, II -zone -950 -1000.