EXTRACTION METHOD OF IRON-ORE CONCENTRATE FROM AGED ALLUVIAL TAILINGS OF WET MAGNETIC SEPARATION OF IRON ORES OF SKARN-MAGNETITE TYPE

摘要

FIELD: mining.;SUBSTANCE: method involves drying of tailing massif, identification of an outline of supergene-converted horizon, separation of thickness of tailings into non-productive lean tailings from upper part of technogenic massives, which are not subject to supergene changes, and productive gothite-magnetite-hematite horizons formed during supergene conversion of technogenic mineral raw material, removal of upper non-productive horizons, extraction of gothite-magnetite-hematite horizon and its processing so that iron-ore concentrate is obtained. Iron-ore concentrate with total iron content of more than 60% is obtained by means of a gravitation-and-magnetic or magnetic method from gothite-magnetite-hematite horizon saturated with iron, which is formed in thickness of aged tailings.;EFFECT: improving efficiency of complex development of iron-ore deposits and processing of wastes of iron-ore production; reducing anthropogenic load onto ecosystems.;2 cl, 2 tbl, 2 ex