In the process of coping with global climate change and achieving the goal of carbon neutrality, the cement industry is facing enormous challenges because of its high energy consumption and high emissions. The low-carbon transformation of
cement industry is not only related to the survival and development of enterprises, but also to the practice of social responsibility, the protection of the earth's homeland, and the immeasurable contribution to the construction of a community of human destiny. Through real carbon reduction actions, cement enterprises can not only improve their own economic benefits, but also leave a blue sky and green land for future generations, creating a solid channel to a green, low-carbon and sustainable future.
However, it is a little regrettable that in the process of coping with the challenges of carbon emissions, although there are many attempts and practices of various carbon reduction measures, a considerable number of methods are still on the surface, showing a state of large investment, slow effect and unsatisfactory actual emission reduction effect. Many enterprises are facing the contradiction between high capital investment and relatively meager actual emission reduction results, which to a large extent hinders the process of realizing low-carbon transformation in the cement industry in a real sense.
"Only when there is a practical effect can it be regarded as a real carbon reduction." Lu Shoujiang, deputy general manager of Suzhou Shijing Technology Co., Ltd. (Hereinafter referred to as Shijing Technology), told China Cement Network that the cement industry urgently needs a new generation of carbon reduction solutions that can not only bring significant carbon emission reduction effects, but also take into account economic benefits and maximize cost-effectiveness, so as to meet the goal of environmental sustainable development. Promote enterprises to achieve sustainable economic benefits and long-term development. Lu Shoujiang (right), deputy general manager
of Shijing Science and Technology, was
interviewed. According to Lu Shoujiang, as one of the important raw materials of building materials, the problem of safe disposal and efficient resource utilization of steel slag needs to be solved urgently. The application of carbon capture technology of steel slag not only helps to solve the problem of steel slag disposal, but also helps to solve the problem of steel slag disposal. It can effectively reduce carbon dioxide emissions in the process of cement production, thus helping the cement industry to achieve low-carbon transformation at the source, and contributing to the goal of carbon peak and carbon neutralization in China's cement industry. On the morning of November 14,
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 in Jiyuan Zhonglian Cement Co., Ltd., Henan Province.
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.
The data show that Jiyuan Zhonglian Carbon Capture Project is provided by Suzhou Shijing Science and Technology Co., Ltd. with a complete set of technical schemes, and has the capacity to treat 300000 tons of steel slag annually to prepare auxiliary cementitious materials for carbon sequestration. It can directly capture and utilize 16000 tons of CO2 in cement kiln flue gas annually, and reduce about 250000 tons of carbon in society.
It is understood that the carbon sequestration technology of Shijing Science and Technology is to use alkaline metallurgical solid waste (steel slag, etc.) To capture CO2 from industrial tail gas (cement kiln, etc.) Through special processes and special catalysts. And the steel slag after carbon capture is used as a mixed material or is used for preparing a carbon fixation high-efficiency composite admixture to produce a low-carbon building material. Carbon fixation auxiliary cementitious material is a new type of carbon fixation high-quality admixture in cement production. Carbon fixation efficient composite admixture can replace mineral powder in cement production and reduce clinker consumption. It can replace mineral powder in concrete production, improve concrete performance and quality and reduce cement consumption.
Not only Jiyuan Zhonglian, but also 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; In September 2023, Suzhou Shijing Science and Technology Co., Ltd. signed a contract with Henan Jiyuan Iron and Steel (Group) Co., Ltd. and Jiyuan Innovation Science and Technology Group Co., Ltd. to collect 32000 tons of CO2 and reduce 500000 tons of carbon annually. The total investment is about 258 million. Through scientific research
, Shijing Science and Technology has successfully converted steel slag into carbon fixation materials, which is a powerful response to the problem of carbon fixation and reduction in the cement industry. In the future, it is expected that Shijing Technology will continue to refresh the boundaries of carbon sequestration technology and bring breakthroughs to the cement industry again and again.
