Recently, the Energy Bureau of the national development and Reform Commission and other four departments jointly issued the implementation guide for the transformation and upgrading of energy conservation and carbon reduction in the iron and steel industry (2022 version). The implementation guide clearly stipulates that by 2025, the proportion of production capacity above the energy efficiency benchmark level of ironmaking and steelmaking processes in the iron and steel industry will reach 30%, and the production capacity below the energy efficiency benchmark level will be basically cleared. The effect of energy conservation and carbon reduction in the industry is remarkable, and the ability of green and low-carbon development will be greatly improved.


According to the benchmark level and benchmark level of energy efficiency in key areas of high energy consuming industries (2021 Edition), the benchmark level of energy efficiency in blast furnace process is 361kg standard coal / ton and the benchmark level is 435kg standard coal / ton; The benchmark level of energy efficiency in converter process is - 30kg standard coal / ton and the benchmark level is - 10kg standard coal / ton; The energy efficiency benchmark level of electric arc furnace smelting (30 tons < nominal capacity < 50 tons) is 67 kg standard coal / ton and the benchmark level is 86 kg standard coal / ton. The energy efficiency benchmark level of electric arc furnace smelting (nominal capacity ≥ 50 tons) is 61 kg standard coal / ton and the benchmark level is 72 kg standard coal / ton. By the end of 2020, the capacity of blast furnace process in China's iron and steel industry with energy efficiency better than the benchmark level accounted for about 4%, and the capacity with energy efficiency lower than the benchmark level accounted for about 30%; The capacity of converter process with energy efficiency better than the benchmark level accounts for about 6%, and the capacity with energy efficiency lower than the benchmark level accounts for about 30%.


Implementation Guide for energy conservation and carbon reduction transformation and upgrading of iron and steel industry


1、 Basic information


Iron and steel industry is an irreplaceable basic raw material industry for the development of China's national economy and an indispensable support for building a modern power. China's iron and steel industry is dominated by long process production of blast furnace converter, and the primary energy consumption structure is mainly coal. There is great potential for energy conservation, carbon reduction, transformation and upgrading.


According to the benchmark level and benchmark level of energy efficiency in key areas of high energy consuming industries (2021 Edition), the benchmark level of energy efficiency in blast furnace process is 361kg standard coal / ton and the benchmark level is 435kg standard coal / ton; The benchmark level of energy efficiency in converter process is - 30kg standard coal / ton and the benchmark level is - 10kg standard coal / ton; The energy efficiency benchmark level of electric arc furnace smelting (30 tons < nominal capacity < 50 tons) is 67 kg standard coal / ton and the benchmark level is 86 kg standard coal / ton. The energy efficiency benchmark level of electric arc furnace smelting (nominal capacity ≥ 50 tons) is 61 kg standard coal / ton and the benchmark level is 72 kg standard coal / ton. By the end of 2020, the capacity of blast furnace process in China's iron and steel industry with energy efficiency better than the benchmark level accounted for about 4%, and the capacity with energy efficiency lower than the benchmark level accounted for about 30%; The energy efficiency of converter process is about 6% lower than the benchmark level, accounting for about 30%.


2、 Working direction


（1） We will strengthen advanced technology research and cultivate benchmarking and demonstration enterprises.


Focus on low-carbon cutting-edge technologies such as by-product coke oven gas or natural gas direct reduction ironmaking, blast furnace oxygen rich or hydrogen rich smelting, smelting reduction and hydrogen smelting, increase the recycling of scrap resources, strengthen the basic theoretical research and industrial innovation and development of the integrity of technology source, and carry out industrialization pilot demonstration.


（2） Accelerate the popularization and promotion of mature processes and orderly promote transformation and upgrading.


1. Green technology process. Promote the technological transformation of internal circulation of sintering flue gas, recovery of pressure equalizing gas at the top of blast furnace, dry dedusting of primary flue gas from converter and so on. Promote technologies such as one can of hot metal to the end, thin strip casting and rolling, hot charging and hot delivery of billet, on-line heat treatment, open up and break through the interface technology of iron and steel production process, and promote the compactness and continuity of metallurgical process. Increase the application and promotion of flux pellet production and large-scale pellet smelting in blast furnace. Carry out green, intelligent and efficient short process steelmaking demonstration of electric furnace, and promote technologies such as efficient scrap recycling and processing, scrap waste heat recovery, energy-saving electric furnace and intelligent steelmaking. We will promote the gradual transformation and upgrading of equipment such as step-by-step sintering machines and pelletizing shaft furnaces with low energy efficiency, low clean production level and high pollutant emission intensity into advanced process equipment, and study and promote the gradual withdrawal of independent sintering (pelletizing) and independent hot rolling.


2. Cascade comprehensive utilization of waste heat and energy. Further increase the recovery and utilization of residual heat and energy, focus on promoting the recovery of low-grade waste heat such as low-temperature flue gas, slag flushing water and circulating cooling water, promote advanced technologies such as electric furnace flue gas waste heat, upgrading of high parameter generator units, low-temperature waste heat organic Rankine cycle (ORC) power generation and low-temperature waste heat multi cogeneration, and realize the maximum recovery and utilization of waste heat and energy resources through cascade comprehensive utilization. Increase technological innovation, encourage and support the R & D and application of process technology and equipment for efficient recovery and comprehensive utilization of medium and high temperature flue gas waste heat and metallurgical slag waste heat under complex conditions such as electric furnace and converter.


3. Energy system optimization. Research and apply digital and intelligent control measures such as heating furnace, baking ladle and in plant transportation of molten steel billet to promote the collaborative optimization of large material flow and large energy flow in iron and steel production process. Comprehensively popularize the application of energy control centers, strengthen the management of energy equipment, strengthen the allocation and use of energy measuring instruments, and promote the digital and intelligent transformation of enterprise energy management. Promote the research and application of various energy medium system optimization, multi flow coupling micro distributed energy system, regional energy utilization self balance and other technologies.


4. Intelligent energy efficiency management. Further promote the innovative application of new generation information technologies such as 5g, big data, artificial intelligence, cloud computing and Internet in energy management, encourage the research and development of energy efficiency mechanism and data-driven model, establish three-level energy efficiency diagnosis system of equipment, system and factory, and realize the intelligent management and control of core energy consuming equipment, intelligent coupling of production process, energy conservation and carbon reduction, intelligent scheduling optimization and control at the global level through dynamic visual fine management and control Coordinated management and control of energy and environmental protection, promote the digital, networked and intelligent development of energy management, and improve the overall energy efficiency level.


5. Transformation of general public and auxiliary facilities. Promote the application of high-efficiency and energy-saving motor, water pump and fan products, and improve the use proportion. Reasonably configure the motor power to realize the power saving of the system. Improve the level of mechanization and automation of enterprises. Carry out the research and application of advanced technologies such as compressed air centralized group control intelligent energy saving, hydraulic system servo control energy saving and potential energy recovery. Enterprises are encouraged to make full use of large-area high-quality roof resources to invest in the construction of distributed photovoltaic power generation projects by means of self construction or leasing, so as to improve the proportion of green power use of enterprises.


6. Low carbon transformation of circular economy. Focus on promoting the production and application of steel slag micro powder and the comprehensive utilization of iron and zinc containing dust and mud, so as to improve the level of resource utilization. Encourage the R & D and application of steel slag micro powder and steel slag composite powder technology, improve the replacement rate of cement clinker, strengthen the R & D and application of steel slag particle permeable high-strength asphalt pavement technology and steel slag carbon fixation technology, and improve the circular economic value of steel slag. Promote the joint production of steel and chemical industry, and produce high value-added chemical products relying on a large amount of hydrogen and carbon monoxide resources rich in by-product gas of iron and steel enterprises. Carry out demonstration application of industrial furnace flue gas recovery and carbon dioxide utilization technology, and promote industrial application.


3、 Work objectives


By 2025, the proportion of production capacity above the benchmark level of energy efficiency in ironmaking and steelmaking processes in the iron and steel industry will reach 30%, and the production capacity below the benchmark level of energy efficiency will be basically cleared. The effect of energy conservation and carbon reduction in the industry will be remarkable, and the ability of green and low-carbon development will be greatly improved.