Device, installation and process treatment to remove impurities from a solution of weak acid plant and process for treating a solution of weak acid.The pie of selenium concentration and process for removing selenium from a solution of the acid clearance

摘要

'' device, treatment plant and process to remove impurities from a solution of weak acid plant and process for treating a solution of weak acid.The pie of selenium concentration and process for removing selenium from a solution of the acid clearance ''.The present invention relates to an apparatus for removing volatile impurities such as mercury and selenium from a weak acid solution resulting from the purification of gas generated in the production of acid sUlfu00fareo by roasting sulphide concentrates.The apparatus comprises a filtration unit for removing calcined calcined solution of weak acid.A unit of a mixture of sodium sulfide to precipitate mercury from the solution of weak acid.A unit of mixture of sodium dithionite to precipitate Selenium Solution of weak acid and a filtration unit to filter out mercury selenium mercury and selenium precipitates from solutions.Use of weak acid.The present invention relates to a treatment plant using this process.A process to remove volatile impurities from a solution of weak acid and a pie of selenium obtained by the use of this invention.