INFLUENCE OF FLUX COMPOSITION ON HYDROGEN CONTENT IN ALUMINUM MELTS

Abstract

The paper is aimed at evaluating the quality and performance characteristics of industrial fluxes, which are intended for refining processing of aluminum melts and used in production conditions of RUSAL JSC (Russian Federation). The results of the work were obtained using X-ray diffraction and thermogravimetric analyzes, as well as standardized procedures for determining the hydrogen content in metallic melts. It is shown that fluxes containing crystalline hydrates and hygroscopic water can be a source of saturation of aluminum melt with dissolved hydrogen. The mechanism of dehydration of crystalline hydrates in the composition of fluxes is given. According to the results of the research, technical solutions aimed at reducing hydrogen saturation of aluminum melt during flux processing are proposed.