Изучение возможности обогащения железомарганцевых руд Кузбасса

Abstract

Russian enterprises meet their needs for manganese mainly through imports. In this regard, creation a domestic manganese ore base is an urgent task. The characteristic of Kuzbass manganese ore deposits, which are of the greatest interest for providing Russian industry with its own raw materials, is given. A significant part of their reserves are represented by iron-manganese ores with a high iron content (10–12%), low manganese content (20–25%) and increased silica content (up to 42%). The results of research of the enrichment of iron-manganese ores of Kuzbass, which showed the inefficiency of using standard methods for their enrichment, are presented. The composition of ores does not allow the smelting of standard manganese alloys, and their use in agglomeration and blast-furnace process is impractical due to the increased content of silica. Therefore, the study of the patterns of behavior of these ores during their metallurgical processing is relevant for finding rational ways of their application. To explore the possibility of enrichment of iron-manganese ores Durnovskaya and Kaigadak ore deposits were investigated, as well as sooty ores and ores with breccia texture of Selesen deposit. To reduce the iron content in the ore, a study of its selective reduction, both solid-phase and liquid-phase, was conducted. As a result, it was experimentally established that the ores of the Durnovsky deposit, which are represented as complex oxide compounds of manganese and iron, can be subjected to solid-phase enrichment, including solid-phase reduction of iron and subsequent magnetic separation. The resulting concentrate is suitable for making silicomanganese. The magnetic fraction can be used in agglomeration and blast-furnace processes. It was shown that iron-manganese ores of the Kaigadak deposits, sooty ores and ores with breccia texture of the Selesen deposit, which have a complex mineralogical composition, are unsuitable for metallurgical methods of enrichment.