China is the world's largest producer and consumer of cement. Relevant data show that in 2021, China produced 57% of the world's cement and consumed more than half of the world's cement. Behind the
huge scale, the cement industry is waiting for heavy pressure on carbon emissions and emission reduction.
"The goal of" double carbon "is decomposed into the tasks that the cement industry needs to fulfill and complete on time, and there are two major transformations." Gao Changming, senior consultant of China Cement Network, said that the first transformation is the transformation of carbon emission quantity, that is, the carbon dioxide emission of cement industry changes from high emission to low emission, zero emission and negative emission (the carbon emission of cement is less than its carbon sink without carbon capture); The second transformation is the transformation of the role of carbon reduction, that is, the cement industry has risen from a "good helper" to a new "fresh force" to prevent global warming and heating, playing a greater role in solving the problem of global climate change.
How can we effectively and substantially reduce the carbon dioxide emissions per unit of cement without affecting the performance and operation of cement, but also maintain a relatively low cost of cement production? Gao Changming proposed five carbon reduction paths:
First, for the process carbon emissions of cement: use less clinker and high-grade cement with the highest carbon footprint, and use more 32.5 cement with the lowest carbon footprint.
The second is the carbon emission of cement combustion: using combustible waste to replace fossil fuel by 100% to calcine clinker, reducing the unit heat consumption of clinker to the minimum, and developing hydrogen energy to replace fossil fuel.
Thirdly, aiming at the carbon emission of electricity consumption of cement: reduce the unit electricity consumption of cement to the minimum; improve the efficiency of waste heat power generation; the cement plant has its own photovoltaic power and wind power + energy storage system to provide zero-carbon electric energy for the plant.
Fourthly, the carbon sink function of cement structures and cement products is included.
Fifthly, the carbon dioxide finally emitted by the cement plant is captured, utilized or stored by CCUS technology to ensure that the cement industry achieves zero carbon emissions and carbon neutralization.
Gao Changming said that the above carbon reduction technology paths are highly targeted, and only through hard work and unremitting efforts in scientific and technological research and development and innovation, and continuous improvement, can above carbon reduction measures be achieved. What are the measures to reduce carbon emissions in the
cement industry? Where should cement enterprises take the lead in carbon emission reduction? In order to actively respond to the national environmental protection policy and implement the concept of green and low-carbon development, China Cement Network will hold the "2023 Cement'Double Carbon 'Conference and the 10th China Cement Energy Conservation and Environmental Protection Technology Exchange Conference" in Zhengzhou, Henan Province, from September 12 to 13, 2023. The cement industry is moving towards a low-carbon, more energy-saving and greener high-quality development.
At the same time, the medal ceremony of "2023 Advanced Enterprises of Double Carbon in Cement Industry" and the "Double Carbon" Equipment Exhibition will be held. After the meeting, we will also organize a visit to Jiyuan Zhonglian Cement Co., Ltd. "The world's first production line of carbon sequestration auxiliary cementitious materials and low-carbon cement from flue gas CO2 of steel slag capture cement kiln". At the meeting, Gao Changming will give a brilliant speech on the theme of "Major Historical Responsibilities and Obligations of Cement Industry under the Background of" Double Carbon ".
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