Process for extracting rhenium from copper smelting off-gas scrubbing solution

• Main Authors: CUI WENZHAO, ZHANG JIANKAI, LUO QINGTANG, WANG HAIBIN, BIAN RUIMIN
• Format: Patent
• Language: Chinese; English
• Published: 25.12.2018
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

A process for extracting rhenium from a copper smelting off-gas scrubbing solution comprises the steps that firstly, a vulcanizing agent is added into the copper smelting off-gas scrubbing solution, copper sulfide and sulfide rhenium sediment is generated, and solid-liquid separation is carried out on a product; secondly, a solid phase obtained in the first step is subjected to oxygen pressure leaching, and after a reaction is completed, solid-liquid separation is carried out again; and thirdly, potassium chloride is added into a liquid phase obtained in the second step, the temperature is reduced to 6 DEG C-10 DEG C, potassium perrhenate with the purity being 80% or above is obtained, then, twice high-temperature dissolution and cooling crystallization are carried out, and potassium perrhenate with the purity being 98% or above is obtained. The process for extracting the rhenium from the copper smelting off-gas scrubbing solution has the advantages that the running cost is low; by combining a copper smelting