Use of Non-magnetic Fraction of Metallurgical Slags in Carbon Dioxide Sequestration Technology

Russia's environmental industrial policy is aimed at increasing the resource efficiency of production, minimizing the negative impact on the environment, strengthening competitiveness and ensuring technological sovereignty. One of the directions of carbon dioxide sequestration is mineral carbonation. The idea of the article is to use for mineral carbonation, as an alternative to natural materials, a non-magnetic fraction obtained as a result of recycling of high-tonnage metallurgical waste-slags. Carbon sequestration technologies by mineral carbonation of technogenic raw materials are at the research stage, therefore it is necessary to assess the suitability of the use of metallurgical slags. To solve the tasks set, the material composition of steelmaking and blast furnace slags has been studied in detail. The content of minerals capable of participating in carbonation in the non-magnetic fraction of slags was determined, and the carbonation potential was evaluated based on calculated and practical data. The requirements for man-made waste for their use as raw materials for carbonation are formulated. The factors that have a restraining effect on the introduction of mineral carbonation technologies are highlighted. An assessment of the carbon cycle at the ferrous metallurgy enterprise is given.