Gas treatment device for dissolving precious metal

The invention discloses a gas treatment device for precious metal dissolution, and relates to the related technical field of precious metal dissolution. The filtering assembly is detachably fixed in the shell and is folded under the action of external force; the multiple supporting assemblies are installed on the outer side of the filtering assembly in an annular array mode and drive the filtering assembly to be folded under the action of external force; the lower adjusting part is arranged below the filtering assembly; the filter assembly is pulled to be folded and deformed through synchronous descending of the lower adjusting part and the sewage guide assembly, gas enters the interior of the filter assembly from the outer side of the filter assembly to achieve automatic cleaning of the filter assembly, the sewage guide assembly is opened when independently descending, filtered impurities are cleaned under the condition that normal filtering of the filter assembly is not affected, and the cleaning efficiency