[Entering Green Steel City] Chongqing Iron and Steel: Active promoter of green low -carbon sustainable development in the steel industry

In recent years, in order to accelerate the pace of green development, Chongqing Iron and Steel integrates corporate resources, coordinated government forces, and promotes social participation, and explores a green and low -carbon development path that can achieve continuous and stable development of enterprises and achieve carbon reduction.

01

To improve the development of green and low -carbon development with extreme efficiency

Chongqing steel is centered on blast furnaces, and the whole process of ironmaking, steelmaking, and steel rolling is developed to practice the concept of "comprehensive benchmarking, paying close attention to cost reduction and efficiency, management extreme, consumption limit", and promote Enterprise energy saving carbon reduction.

As a large energy -consuming household, Chongqing Iron and Steel has multiple measures in three processes of coordinating, sintering and blast furnaces, and continued to carry out measures such as coal -to -focus and rejuvenation. Essence In the 2021 Sino -Steel Association Energy -saving and emission reduction labor competition, No. 1 Bars furnace won the national "2000M³ (inclusive) ~ 3000M³ -level blast furnace energy reduction furnace in 2021". In January 2022, the Chongqing Steel 2 blast furnace won the title of "Level 2000 Low Carbon Champions" for the "2000 Level 2000 Low Carbon Champions" with excellent results.

In the first quarter, the first -quarter of the blast furnace was 675735.2 tons, and the utilization coefficient of the blast furnace was 3.003tm³ • D, and the score was 105.2 points

The steelmaking process adopts measures such as process optimization, horse racing mechanism, and skill training. Steel -steel consumption is at the leading level of domestic steel companies.

The rolling process sets up the hot delivery working group to establish a long -term promotion mechanism, refine the consistent system management, continuously optimize the process system, and promote the improvement of the heat installation rate. In February 2022, the heat installation rate of the 1780mm hot roll production line reached more than 80%, ranking first in China Baowu.

02

Craft technology carbon reduction promotion energy efficient use

Chongqing Iron and Steel also did a lot of work in environmental protection.

Carry out the research on the use of sulfur ash resourceization of sulfur ash and blast furnace hot -air furnace smoke desulfurization test to achieve the safety disposal of desulfurization ash harmless, effectively use CACO3 and CA (OH) 2 in desulfurization ash Essence Among them, CAO can be used for sintering process, and products can be made after the separation of sulfur to achieve effective use of resources.

Chongqing Iron and Steel will use a new generation of green environmental protection intelligent connection machine crystal crystal vibration device -electro -hydraulic direct servo vibration cylinder for efficient transformation. It uses clean production innovation technology. Self -capacity, low waste oil, low noise, maintenance, non -leakage, anti -pollution, and more than 40%of the traditional hydraulic vibration energy saving. The use of energy -saving and consumption reduction technology such as steel bag covers is reduced by 10 ° C, which greatly reduces gas consumption.

Chongqing Iron and Steel's new "smart production line" double high -rotation line uses a non -heating furnace unsolved direct -rolling process technology, which cancels the process of heating furnace heating (this process occupies 70%energy consumption and 90%carbon emissions), steel billet emissions), steel billet emissions), steel billet emissions), steel billets) It can be directly cast from steelmaking to rolling processes for rolling. This process only takes 80 seconds. In April 2022, the production line achieved hot -rolled mass production.

03

Implementation of energy -saving projects to promote the implementation

Focusing on the theme of "energy saving and carbon green development", Chongqing Steel creates a "beautiful heavy steel, landscape heavy steel" with "landscape surround and green friendship", and is committed to becoming a green low -carbon collar enterprise. In recent years, Chongqing Iron and Steel has always put the Yangtze River ecological environmental protection and repair in an overwhelming position, formulated the "Chongqing Steel" Yangtze River Protection "Environmental Protection Plan", and clarified the work goals and specific measures of Chongqing Steel to implement the Yangtze River Protection.

Since 2018, Chongqing Iron and Steel has implemented about 80 energy -saving and environmental protection projects such as "transfer of gas into mixed gas and increasing the comprehensive utilization rate of gas", "Rich Water Gas Efficient Power Generation Project", and the investment amount is about 3.6 billion yuan. The ironmaking plant No. 5 and No. 6 coking furnace waste furnace rising tube waste heat recovery, the 1780mm heat roll production line No. 1, No. 2, 3 of the heating furnace flue gas waste heat recovery and other projects have been completed and put into operation. The gradual implementation of steelmaking No. 3 and No. 4 LF secondary dust turbine transformed frequency conversion, which reduced the power consumption of tons of steel by 1 kilowatt -hour, and about 1.1 million kilowatt -hours of annual festivals. In 2021, Chongqing Iron and Steel use residue and other resources for efficient use, with a total power generation of nearly 3 billion kWh.

Chongqing Iron and Steel rationally planned the implementation path of "zero discharge of wastewater, ultra -low exhaust gas, and unable to get out of the factory" (Sanzhi). From 2020 to 2023, it invested over 5 billion yuan and was used for upgrading and transformation of the "Three Governance" projects.

Actively promote the application of water -saving technology and non -traditional water source use. The construction of the central wastewater expansion, zero discharge of wastewater (phase), rainwater reuse treatment system and other projects were completed. It is planned to carry out projects such as zero discharge (phase 3) of wastewater. In the future, Chongqing Iron and Steel will fully realize zero discharge of wastewater.

Quickly promote ultra -low emissions of exhaust gas. No. 2 and No. 3 sulfur desulfurization renovation, No. 2 flue gas denitration and other key projects have been completed and put into operation. 3 projects such as sulfing dumplings, No. 1 sulfur dehydration, denitrification, and scorching fang sulfur dehydration and denitrification will be completed and put into operation in the near future. At present, it is implementing projects such as the closed field and the closure of the belt corridor. In 2022, it will fully realize clean transportation. In 2023, it will fully complete the work of ultra -low exhaust gas transformation and environmental performance.

Chongqing Iron and Steel is in the construction of a wealthy gas power generation project

Chongqing Iron and Steel Power Plant

Realize the resource and reduction of solid waste from the source, promote the internal consumption of solid waste, and implement the certification of solid waste product. Chongqing Iron and Steel completed the construction of general industrial solid waste stoves and hazardous waste storage warehouse projects, and realized refined management of fixed -hazardous waste. In 2022, the productization certification rate will reach 100%, achieving the target of solid waste. In addition, the comprehensive use of the intelligent cycle of the intellectual ivileness of the Hoamer Furnace Standard and Baowu Ringke of Chongqing will be completed in the near future. After being put into use, Chongqing Iron and Steel Affapiative -blast furnace slag will become waste into treasure, becoming the raw material of the production of mineral powder, and realize the comprehensive use of the intelligent cycle of the blast furnace slag.

According to the "factory in the forest, the road is in the green, and the man is in the scene" idea, from 2020-2022 Chongqing Iron and Steel invested about 60 million yuan to "four modernizations" (cleansing, greening, beautification of the factory appearance and factories. , Culture) Transformation, as of now, Chongqing Iron and Steel has completed the upgrading and transformation of "Internet Red Attractions" such as Honor Forest, Factory Viewing Avenue, and Xianqu Garden. It reaches 2.1 million square meters.

Honor forest

conference Center

In the future, Chongqing Iron and Steel will promote the "6C" carbon reduction in the "6C" project, the "1030" project of the blast furnace "361" project, and the efficient utilization of carbon reduction, short -range processing process carbon reduction, CO2 capture and resource efficient use. Rolling steel to "live" three major projects, strengthen the research and development and application of steel process interface technology, layout of hydrogen energy industry projects, etc., and accelerate the "carbon peak, carbon neutralization" process of Chongqing steel.

Author | Li Chaoqun Bi Shuqin

Picture | Li Chaoqun Ganquan

Edit | Chen Xi

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