FIELD: metallurgy.
SUBSTANCE: invention relates to nonferrous metallurgy and may be used for recovery of solutions resulted from mineral stock leaning, particularly, for iron ions oxidation. Said tower comprises cylindrical body with solution feed and discharge branch pipes, and process automatic control system (PACS). Tower body is filled with carrier whereon sorbed are iron-oxidising microorganisms made up of solid porous material with developed surface. Note here that tower bottom is furnished with tank to house PACS transducers and solution feed control device.
EFFECT: increase in rate of oxidation of iron (II) to iron (III) from 3 g/lh to 15 g/lh.
1 dwg, 1 tbl, 2 ex
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