2. Technical decontamination. The wastewater and waste gas discharged in the production of iron and steel industry is a key and difficult problem in enterprise waste treatment. In order to completely solve the pollution of waste water and waste gas to the surrounding environment, Shanxi Wenshui Haiwei Iron and Steel Co., Ltd. introduced coarse particle separator and electrostatic dust removal technology. The turbid circulating water produced in the production process first passes through the oil pollution filter, then passes through the harmless evolution of sedimentation tank and cooling tower, and finally becomes available clean water. The treatment of waste gas is more complicated. It integrates electrostatic dust removal, gravity dust removal, bag dust removal and cyclone dust removal, and realizes the effective recovery and harmless discharge of all waste gases.