ОЦЕНКА ВОЗМОЖНОСТИ ИСПОЛЬЗОВАНИЯ ГИДРОЛИЗНОГО ЛИГНИНА КАК ВОССТАНОВИТЕЛЯ МЕТАЛЛОВ ИЗ ПЫЛИ ДУГОВЫХ ЭЛЕКТРОПЕЧЕЙ

Abstract

Experimental results on the reduction of zinc and iron from the dust of electric arc furnaces by hydrolytic lignin in an inert atmosphere are given in the work. The thermogravimetric curve data were processed at temperatures of 700–1000 ºC. It was found that the reduction occurs in two stages: 700–800 ºC and 800–950 ºC. Samples of the original dust and those recovered at different temperatures are not single-phase, which was determined by X-ray phase analysis. In the initial dust, such phases as Fe3O4 and ZnO predominate, at 800 ºC the reflections of the FeO phase have the highest intensity, at 1000 ºC the Fe phase appears in the samples. Based on the data of thermal and X-ray phase analysis, reaction equations are proposed that underlie the process of reduction of dust metals by hydrolytic lignin.