In September 23rd, the Ministry of environmental protection website issued the air pollution prevention and control of Tianjin and the surrounding areas to strengthen the supervision briefing, informed that, in the process of inspectors, the elimination of small boilers transformation, involving gas "scattered pollution" enterprise comprehensive treatment, the treatment of volatile organic compounds in urban and rural areas, scattered coal governance, not installed pollution control facilities such as the most prominent problem.

The steel industry has long been criticized as a major source of energy consumption and pollution. The iron and steel industry from coking, sintering, ironmaking, steelmaking and rolling to the smelting process will produce different types of pollutants, almost half of the material inputs in the waste gas, solid waste or by-products in the form of being discharged.

In the steel production process, sintering and coking sectors mainly produce sulfide, nitrogen oxides and soot emissions, ironmaking and steel slag and other solid waste generated links, pollutants are mainly produced in rolling process of cooling water pollution, such as wastewater which produce sintering and coking of sulfide, nitrogen oxides and smoke dust gas the most serious pollutants. Sulfur dioxide emissions from coking and sintering plants exceed 2/3 of the total emissions of the entire steel industry. Nitrogen oxides account for about 2/3 of the total iron and steel industry, and particulates exceed 40% of the total iron and steel industry.

June this year, the Ministry of environmental protection issued the "iron and steel sintering and pelletizing industry air pollutant emission standards" and other 20 national emission standards revision notice (draft). Among them, five modified the production of iron and steel industry national standards, mainly for sintering and pelletizing production processes, the emission concentration of particulate matter, sulfur dioxide, nitrogen oxides decreased from 50, 200 and 300mg/m?, further reduced to 20, 50, 100mg/ m?; in addition to the fugitive emission control and roasting flue gas oxygen base the new rules.

Fugitive emission refers to the non closed in the process of organizations, intermittent discharge of pollutants in the production process of material preparation, reaction products, distillation, drying, unloading process, through evaporation, flash, sweeping way to escape into the atmosphere. Emissions control and governance are more difficult than organized emissions with special emissions outlets. It is understood that, at present, China's iron and steel industry, a considerable portion of atmospheric pollution sources in an unorganized form. From the actual situation, the majority of large iron and steel enterprises exhaust gas capture rate is only 60%-70%, some small enterprises or enterprises with low management levels of emissions of non organized smoke amount to more than 80%.

Draft regulations, the existing enterprise emission control measures required to implement since January 1, 2019, Beijing, Tianjin and air pollution transmission channel since October 1, 2017 implementation of the city. "Beijing, Tianjin and air pollution transmission channel city", that is, the recent environmental inspector "2+26" city. "2+26" the city has about 167 steel enterprises, where the 4 provinces, accounting for 50% of the steel production capacity, accounting for 40% of the total output of iron and steel. The regional concentration of iron and steel industry is highly concentrated, and there are many emission points and emissions of air pollutants, so the environmental governance and supervision are difficult.

In addition, before the end of October this year the Ministry of environmental protection will be completed "2+26" city of steel, cement work permit issuance.

In addition, in October the "2+26" city in autumn and winter tackling air pollution control action will also start, heating quarter steel production capacity of limited production and coking, casting, building materials, transportation and other industries peak production and transportation are also expected to implement the new regulations. A number of environmental policies, the new emissions standards to enhance environmental protection, continued efforts to upgrade and accelerate landing, the iron and steel industry will usher in the annual environmental test.