On the journey of the new era, China's cement industry is standing on the cusp of green development. On September 9
this year, the official website of the Ministry of Ecology and Environment issued a public solicitation of opinions on the Work Program of the National Carbon Emission Trading Market Covering Cement, Steel and Electrolytic Aluminum Industries (Draft for Opinions). The draft clearly points out that the carbon emission quota of the cement industry will start in 2024 and be verified in 2025. The introduction of this policy not only sets a clear timetable for carbon emission reduction in the cement industry, but also provides a solid policy guarantee for the green transformation of enterprises.
In this green revolution, the cement industry, as a major carbon emitter, is not only a challenge to survival, but also the only way to achieve sustainable development. Especially in the current complex and severe market environment, cement enterprises must carry out long-term layout, and carbon emission reduction is the key to enhance the core competitiveness of enterprises. As Shao Jun, chairman of China Cement Network, said, "double carbon" is not only a responsibility, but also a cost and benefit. Dong Shihong, chairman of
Suzhou Shijing Technology Co., Ltd. (Hereinafter referred to as "Shijing Technology"), agrees with this. In his view, in the face of the current severe challenges in the cement industry, the "double carbon" goal is not only an important starting point, but also a key force to promote the industry to eliminate backward production capacity and move towards high-quality development.
Although Dong Shihong, chairman
of Shijing Science and Technology, is of far-reaching significance, the road to carbon reduction in the cement industry is not easy. When communicating with China Cement Network, Dong Shihong pointed out that benefit is the basis for the survival of cement enterprises. If the huge amount of capital investment only stays in the form of "carbon emission reduction" and fails to translate into actual benefits, it will undoubtedly accelerate the demise of enterprises. Therefore, only the organic combination of "carbon reduction" and "profit" can really promote the cement industry to go faster and farther on the road of carbon emission reduction.
Dong Shihong (right) and Jiang Xun (left), general manager of China Cement Network, communicate
how to make "carbon reduction" more valuable? The "steel slag + carbon dioxide = cement clinker" developed by Shijing Science and Technology through independent innovation may be one of the best answers.
As early as November 2022, the world's first steel slag capture cement kiln flue gas CO2 production line for carbon sequestration auxiliary cementitious materials and low-carbon cement was completed and put into operation.
The project uses the dry method of steel slag to capture and utilize CO2 in situ, which can effectively solve the problem of poor stability of steel slag and improve its activity while reducing the emission of CO2 from cement kiln flue gas. The auxiliary cementitious material with high activity and carbon fixation is prepared, which breaks through the bottleneck problem that restricts the large-scale safety and high value-added application of steel slag in cement, concrete, aggregate and other building materials for a long time. It can be said that the operation of the project provides an important choice for promoting the low-carbon development of the cement industry and realizing the unity of economic and environmental benefits. The
data show that the project has an annual production capacity of 300000 tons of steel slag for co-production of carbon sequestration auxiliary cementitious materials, which can directly capture and utilize 16000 tons of CO2 in cement kiln flue gas annually, and reduce carbon by about 250000 tons in society.
In addition, the technology of using steel slag to capture CO2 from flue gas has been applied in many projects. In April
2023, the world's first use of steel slag to capture CO2 from lime kiln flue gas was completed and put into operation. Yongfeng Project has the production capacity of treating 300,000 tons of steel slag per year and preparing auxiliary cementitious materials for carbon sequestration, which can directly capture and utilize 16,000 tons of CO2 in lime kiln flue gas per year and produce 600,000 tons of high-efficiency composite mineral admixture per year. On May 21
this year, the formal signing of Baowu E Steel Carbon Capture and Industrial Solid Waste Resource Utilization Project, a landmark event of cooperation between Shijing Science and Technology and Baowu Group, not only indicates that the two sides have taken a solid step in exploring the deep cooperation in the field of industrial carbon reduction and resource recycling, but also marks that China's iron and steel industry is in the field of industrial carbon reduction and resource recycling. It is another milestone in the transformation of efficient emission reduction and sustainable development mode. According to the
data, the project is located in the plant area of Echeng Iron and Steel Co., Ltd. of Baowu Group, Ezhou City, Hubei Province. It is planned to invest 144 million yuan to build a 300000 tons steel slag pre-grinding system, a 300000 tons steel slag carbon capture system and a high-efficiency composite mineral admixture production system with an annual output of 1 million tons. After the project is put into production, the annual output of high-efficiency composite mineral admixture will be 1 million tons, which can directly capture and utilize 20,000 tons of carbon dioxide. By indirectly reducing the amount of cement clinker in cement and cement in concrete, the comprehensive carbon reduction will reach 250,000 tons.
The project uses non-carbon raw materials such as steel slag to capture flue gas CO2 in situ at low cost. After carbon capture, steel slag becomes a carbon fixation auxiliary cementitious material, which can be used in the production of low-carbon cement. At the same time, it can cooperate with other materials such as mineral powder and fly ash to prepare high-efficiency composite mineral admixtures. The material can be applied to cement, concrete and other related industries.
It can be said that the project not only sets an industry model, but also actively responds to Ezhou's "double carbon" policy objectives by promoting the coordinated development of low-carbon steel and green building materials industry, and effectively promotes the improvement of social well-being; At the same time, in view of the steel slag treatment problems faced by Egang, the project innovatively enhanced its solid waste disposal efficiency, realized the large-scale collection, resource conversion and high value-added utilization of steel slag waste, opened up a new economic growth point for Egang, and achieved both economic and environmental benefits.
As Dong Shihong said, "Carbon is the future". At the intersection of history and future, Shijing Science and Technology, with low carbon as its pen, helps the cement industry to depict a harmonious picture of green mountains, green waters and industrial prosperity, and casts a hard backbone of sustainable development in the blending of grey and green.
Founded in 2005, Shijing Science and Technology has gone through more than ten years. From LCR, SCR, to carbon sequestration, and then to the photovoltaic field, every breakthrough and every leap is the adherence and persistence of Shijing Science and Technology under the leadership of Dong Shihong to green development, and also the practice and pursuit of the vision of harmonious coexistence between man and nature.
In this magnificent green low-carbon transformation, Shijing Technology is not only a participant, but also a leader. With innovation as the sword and responsibility as the shield, they bravely stand at the forefront of the development of the industry and help the cement industry move towards a greener and more sustainable future!
