From March 2021 to June 2021, our company is responsible for rebuilding the environmental protection improvement project of the gold refining production line and the sales of precious metal laboratory equipment. The process of refining gold by aqua regia dissolving wet method, adding automatic control system equipment. Design the second-generation upgrade precious metal refining double-layer titanium reactor, and further improve the waste gas treatment, with the design and installation of all refining equipment such as steam heating and cooling equipment, waste water treatment equipment, and waste gas treatment equipment, and provide gold refining technical services