USE OF FINELY DISPERSED MANGANESE CONCENTRATES IN METALLURGICAL PROCESSES

Analysis of the physicochemical properties of the 2nd grade concentrates shows that the characteristic granular-sandy structure does not provide sufficient compaction of the sinter charge and does not allow to obtain the required granulometric composition and strength indicators of the granulated material during its granulation. One of the ways to increase the degree of utilization of tailings is preliminary preparation with the introduction of binders "Porf hydroxide reagent". In the laboratory conditions of NMetAU, the peat hydroxide reagent was tested when obtaining a sinter from a charge containing tailings from the enrichment of manganese ore. The quality of the obtained sinter: yield of usable - 81.3%; impact strength - 3.0%; abrasion strength - 1.5%; chemical composition of the finished sinter: Mntotal - 28.72%, S - 0.211, C - 0.91%. According to the results of fractographic analysis, a fine fracture structure of the sintered sample was revealed. The structure of the fracture surface is characterized by a pitted microstructure. The relief formed by a set of individual facets is characteristic. Such a structure is explained by the fact that when limit states are reached in local volumes, microvoids are formed in areas that represent obstacles to the continuity of deformation.