CN Sci & Tech works to solve the technical and economic problems of industrial waste recycling in production. It has built a comprehensive recovery line (200000 tons) of solid and hazardous waste, and has obtained the qualification of utilizing the recycled waste. The company's projects adopt domestic and foreign advanced wet metal extraction under normal temperature and atmospheric pressure, separation technology and oxygen-rich side-blown smelting process, which can recycle and conduct the harmless disposal of solid and hazardous waste with different contents, and produce nickel sulfate, matte nickel, cobalt salt, cathode copper, wear-resistant materials, sodium sulfite and so on.