The Study of the Characteristics and Possibilities of Using Slags and Dusts from Ferrochrome Production

Abstract

The analysis of waste generation from the production of chromium-containing ferroalloys in the Russian Federation is carried out.Representative samples of slags and dusts were selected from the production of chromium ferroalloys, depending on the grade composition and the technological equipment used.The chemical and phase compositions of the samples were studied.The fractional composition of self-disintegrating slags and dusts was studied by the method of dynamic analysis of digital images.Physicochemical characteristics were experimentally investigated: density, melting points, viscosity of selected samples. Wastes from the production of various grades of chromium ferroalloys have their own specific compositions and properties. The melting temperature range of the studied samples varies in a wide range and differs significantly for each of them. Dusts from gas cleaning of high-carbon ferrochrome have the lowest melting points (1460 - 1480 ºС). Dust from cyclones and low-carbon ferrochrome gas cleaning have the highest melting temperature ranges reaching 1790 ºС. According to its characteristics, waste of chrome production can be used in small quantities (up to 10%) as additives in the production of ferroalloys of other grades. Waste from chromium production can be more efficiently used in the production of refractory products and materials for ferrous metallurgy.