METHOD AND PLANT FOR EXTRACTION AND UTILIZATION OF CHLORINE AT LEACHING OF METALS Russian patent published in 2004 - IPC

FIELD: hydro-metallurgy; oxy-chloride technology of extraction of noble metals; geo-technology at heap and underground leaching of metals from ores; cleaning industrial solutions from chlorine. SUBSTANCE: proposed method includes pumping and raising productive solutions followed by successive treatment of pumped productive solutions with air at low point of raising in the course of raising the solution; then, solutions are subjected to dispersion for separation of chlorine-containing gas phase from liquid phase, after which liquid phase is fed to collector and settler and is directed to film-type desorber for additional treatment with air or is subjected to vacuum treatment or heating or action of ultrasonic oscillations; chlorine-containing gas phases from inclined collector, settler and film-type desorber are combined and are directed for absorption with mother liquors; removal of chlorine from productive solution is performed at pH lesser than or equal to 3. EFFECT: reduced specific consumption of chlorine; enhanced ecological safety in case untightness of containers or equipment filled with liquefied chlorine. 11 cl, 1 dwg, 2 tbl, 2 ex