Zhang Linfeng, an expert in the development and technology and environmental protection department of China Iron and Steel Association, pointed out in the report of the meeting that at present, the following major problems and difficulties still exist in the green development of China's steel industry: some enterprises have insufficient attention to environmental management, extensive environmental management, and uneven levels. The degree of attention is not enough, and the main responsibility of pollution control cannot be seriously fulfilled; there are excessive discharge behaviors such as abnormal operation of pollution prevention facilities and direct exhaustion of smoke; quite a lot of enterprise management is relatively extensive, and there is no unified coordination of solid waste generation, circulation and reuse. A number of subordinate units of the subordinates dispose of themselves or dispose of them by themselves, and the solid waste utilization business is decentralized, and solid waste such as desulfurization by-products and steel slag is piled up or backfilled.

In most enterprises, the governance facilities are all on, the closed ones are closed, and the dust removal is on, but the management is still insufficient, and the governance effect is not really exerted. As the country has become more and more strict with the requirements of the professional environmental management personnel and the quality of the environmental protection facilities, the ultra-low emission transformation technology is becoming more and more difficult. Taking sintering as an example, it is difficult to achieve stable compliance during execution. Only achieve NOX less than 100 mg per cubic meter. It is necessary to increase the medium temperature selective catalytic reduction technology or the end treatment facilities such as activated carbon. Each 360 square meter sintering machine needs to invest more than 100 million yuan, and the running cost is above 15 yuan/ton. Considering the existing process technology level, it is necessary to stably operate for a long time while satisfying SO2 ≤ 35 mg / standard cubic meter, particulate matter ≤ 10 mg / standard cubic meter, NOX ≤ 50 mg / standard cubic meter, from the advanced, reliable, applicable, economic considerations, The prior art support is difficult and economical.

When talking about the structural adjustment of the steel industry and the optimization of the process structure to solve the problem of regional environmental capacity, Zhang Linfeng pointed out that it is necessary to adhere to the structural adjustment, transformation and upgrading as the main line, prohibiting the addition of new production capacity, and improving the elimination of excess capacity in key areas, thereby improving the steel industry. Energy conservation and environmental protection.

The specific measures for prohibiting the increase of production capacity are: no steel projects with new capacity can be filed in any name or in any way; the construction of iron-making steelmaking projects must be replaced by capacity, and the replacement of energy-sensitive areas such as Hebei should be no less than 1 :1.25.

The specific measures to increase the elimination of backward steel production capacity are: resolutely implement the "Opinions on comprehensively strengthening the ecological environment protection and resolutely crack down on the prevention and control of pollution prevention", and encourage local governments to formulate a broader and more stringent backward production capacity elimination policy; Define backward production capacity standards, eliminate production capacity with high energy consumption and high pollution intensity, improve the overall energy efficiency of the industry, reduce coal consumption and power consumption level; and regulate the gas generator pollution for the current situation of many independent hot rolling processing enterprises Emissions issues and energy efficiency issues.

The specific approach of promoting mergers and acquisitions and promoting energy conservation and emission reduction is to adhere to the promotion of mergers and acquisitions to improve industrial concentration, which will help promote the application of energy-saving technologies and means such as energy cascade utilization, system optimization, and comprehensive pollutant treatment. Conducive to the wrong peak production arrangements within the enterprise.

When talking about the issue of promoting large-scale equipment and promoting energy-saving and emission reduction, Zhang Linfeng believes that the draft of the ultra-low emission reform work plan issued by relevant departments emphasizes increasing the capacity reduction in key areas and eliminating sintering machines below 130m2 and below 1000m3. Blast furnace, coke oven with a carbonization chamber height of 4.3 m and below and an operating life of more than 10 years. In the long run, the metallurgical industry has room for large-scale equipment. Because, under the same production capacity, large-scale smelting equipment is out of the furnace or the number of tapping and tapping is small, and the paroxysmal pollution is lighter. Take 2 million tons of coking plant as an example, 7.63 meters, 7 meters, 6 meters, 4.3 meters top loading coke oven, the number of pushes per day is 113 times, 172 times, 255 times, 357 times, the fewer the number of furnaces, the less The less emissions of coal and push coke paroxysmal pollutants. For example, under the same production capacity, small smelting equipment has many sources of organized pollution, and there are many uncontrollable links of unorganized emissions. Environmental monitoring is difficult and environmental protection is difficult. Taking the coke oven with an annual output of 1.1 million tons as an example, the number of coke oven leakage ports with a height of 7 meters in the carbonization chamber is reduced by 23.6% compared with the 6 m coke oven, the length of the sealing surface is reduced by 8.5%, and the number of opening leaks per day is reduced by 31%. Greatly reduce harmful gas emissions and improve coking production operating environment.