Steel slag is the main by-product during the steel manufacturing process, with the characteristics of large output and low utilization rate. Since the high content of calcium oxide in steel slag, it is often used for CO₂ capture. In this paper, progress on the development of steel slag for fixing CO₂ is reviewed. This review is organized according to the carbonation type of steel slag, including direct carbonation and indirect carbonation. For direct carbonation, it is introduced from two parts: aqueous carbonation and gas-solid carbonation. For indirect carbonation, it is summarized according to the extracting agent. The carbonation condition and capacity will be carefully discussed. Besides, the techno-economic assessments of using steel slag for CO₂ capture are discussed. This paper will provide an overview of the steel slag using for CO₂ sequestration available and valuable suggestions for future study.

中文翻译：

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钢渣在二氧化碳固定中的应用综述

钢渣是钢铁制造过程中的主要副产品，具有产量大、利用率低的特点。由于钢渣中氧化钙含量高，常用于CO _{2 的}捕集。本文综述了钢渣固定CO ₂的研究进展。本次审查根据钢渣的碳化类型进行组织，包括直接碳化和间接碳化。对于直接碳酸化，从两部分引入：水相碳酸化和气固碳酸化。对于间接碳酸化，按萃取剂概括。将仔细讨论碳酸化条件和容量。此外，钢渣用于CO ₂的技术经济评价捕获进行了讨论。本文将概述可用于 CO ₂封存的钢渣，并为未来的研究提供有价值的建议。