On October 9th, Yunnan Xiangyun Feilong Recycling Technology Co., Ltd. developed key technologies for zinc secondary resource extraction and complete sets of process equipment, key technologies for wet smelting of lead sulfate slag and complete sets of process equipment, through China Association of Circular Economy and China Environmental Protection Federation. Evaluation of scientific and technological achievements organized by Beijing.

Experts believe that zinc extraction technology has reached the international leading level. The project can recover sodium chloride and potassium chloride, and the results have realized the recycling of zinc secondary resources, which has good economic, environmental and social benefits. The wet method of lead smelting is an international initiative, opening up a new way for lead hydrometallurgy.