China is the hottest country to promote the implem

China promotes the implementation of ultra-low emissions in the steel industry. Five ministries and commissions, including the Ministry of ecological environment, jointly issued the "opinions on promoting the implementation of ultra-low emissions in the steel industry" a few days ago. It is proposed to promote the ultra-low emission transformation of existing steel enterprises. By the end of 2020, significant progress will be made in the ultra-low emission transformation of steel enterprises in key regions, and efforts will be made to complete the transformation of about 60% of the production capacity; By the end of 2025, the ultra-low emission transformation of iron and steel enterprises in key regions will be basically completed, and the whole country will strive to 81: the interface on the controller will be transformed one by one corresponding to more than 0% of the production capacity

the steel industry has become the largest source of pollutant emissions in the industrial sector

hekebin, academician of the Chinese Academy of engineering and Dean of the school of environment of Tsinghua University, said that China is the world's largest steel producer, and the output of crude steel accounts for about half of the world's total output. The total output of the steel industry is huge, the emission level is uneven, and the total emission of the industry is still high. According to estimates, but it can move freely along the axis, the emissions of sulfur dioxide, nitrogen oxide and particulate matter from the steel industry accounted for about 7%, 10% and 20% of the total national emissions respectively in 2017. Since the implementation of ultra-low emissions in coal-fired power plants, the emission of pollutants in the thermal power industry has decreased significantly. In 2017, the emission of major pollutants in the steel industry has exceeded that of the power industry, becoming the largest source of pollutants in the industrial sector

at the same time, the iron and steel industry is one of the industries with the largest cargo transportation volume. The freight volume of China's iron and steel industry is more than 4 billion tons, accounting for about 1/10 of the total freight volume of the country, and it mainly depends on road transportation. The emission of nitrogen oxides and particles during transportation is prominent, accounting for more than 20% of the emissions of iron and steel enterprises themselves

experts said that the centralized layout of China's steel industry is also an important reason for regional air pollution. The steel production capacity of Beijing Tianjin Hebei and its surrounding areas, the Yangtze River Delta, the Fen Wei plain and other key areas of air pollution control accounted for 55% of the total production capacity of the country, and its average PM2.5 concentration was also about 38% higher than the national average concentration

Li Xinchuang, President of metallurgical industry planning and Research Institute, introduced that since the "Eleventh Five Year Plan", the iron and steel industry has carried out comprehensive pollution control and transformation work, and the emissions of organized particles per ton of steel and sulfur dioxide per ton of steel have decreased by more than 60% and 70% respectively, but the problems of no measures taken, low treatment level, serious unorganized emissions, large total emissions in key areas and so on have not been fundamentally solved, It has seriously restricted the healthy development of China's steel industry

"the steel industry still has and drives new data worth trillions of dollars, which shows that there is more room for emission reduction in the industrial chain." He Kebin said that compared with developed countries such as Japan, Germany and South Korea, there is still a big gap between the pollution control level and environmental protection management level of China's steel industry, especially the unorganized emission accounting for more than 50% of particulate matter emissions, and the unorganized emission of particulate matter per ton of steel is more than twice that of developed countries. China urgently needs to benchmark the international advanced level to achieve a substantial reduction in emissions from the steel industry

realize the whole process and whole process environmental management

according to this opinion, the ultra-low emission of iron and steel enterprises refers to the implementation of upgrading and transformation of all production links, and the organized and unorganized emission of air pollutants and the transportation process meet the following requirements:

the hourly average emission concentrations of sintering machine head, pellet roasting flue gas particles, sulfur dioxide and nitrogen oxides are not higher than 10, 35 and 50 mg/m3 respectively, In principle, other major pollution sources shall not be higher than 10, 50 and 200 mg/m3 respectively

effective measures such as sealing and sealing shall be taken in the storage, transportation and production process of materials to achieve effective control of unorganized emissions

bulk materials and products are transported by railway, waterway, pipeline and other clean methods, and the proportion of clean transportation is not less than 80%

Li Xinchuang said that the iron and steel industry is a process industry with many production process links. Therefore, the difference between the ultra-low emission of the iron and steel industry and the ultra-low emission of coal-fired power plants is that all production links in the whole process of iron and steel production must meet the requirements of ultra-low emission in all aspects. Iron and steel enterprises should implement the transformation of ultra-low emissions, not only to implement the transformation of organized emissions, but also to pay attention to the treatment of unorganized emissions and the clean transformation of transportation modes

the ultra-low emission transformation will significantly improve air quality

the opinions put forward that for enterprises that have completed the ultra-low emission transformation, we should increase policy support in tax, capital, price, finance, environmental protection, strengthen the main body of enterprises, strictly evaluate management, and strengthen supervision and law enforcement

experts pointed out that this opinion reflects the differences in management. During the period of dealing with heavily polluted weather, enterprises that have not completed the transformation of ultra-low emissions should be strictly managed; Emphasize the promotion according to law, make it clear that up to standard emissions are legal and ultra-low emissions are encouraged and guided, and give corresponding policy support to enterprises that complete the transformation of ultra-low emissions; It emphasizes operability and requires steel enterprises to formulate a "one plant, one policy" governance plan to strictly control the project quality and ensure long-term continuous and stable operation

he said that according to preliminary calculations, by 2025, when the task is fully completed, it will drive the iron and steel industry to reduce sulfur dioxide, nitrogen oxide and particulate emissions by 61%, 59% and 81% respectively. As the steel industry is relatively more concentrated in key areas, ultra-low emission transformation will produce greater environmental benefits in key areas. After the ultra-low emission transformation of the steel industry is completed in key areas, such as Beijing Tianjin Hebei and the surrounding areas, the total emissions of sulfur dioxide, nitrogen oxides and particulate matter will be reduced by 14%, 18% and 21% respectively on the current basis