Wang Shuping, Wang Mingda, Liu Fang, Song Qiang, Deng Yu, Ye Wenhao, Ni Jun, Si Xinzhong, Wang Chong
College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China.
Baowu Environmental Technology Wuhan Metal Resources Co., Ltd., Wuhan 430082, China.
Materials (Basel). 2024 Apr 28;17(9):2066. doi: 10.3390/ma17092066.
Steel slag is a by-product of the steel industry and usually contains a high amount of f-CaO and f-MgO, which will result in serious soundness problems once used as a binding material and/or aggregates. To relieve this negative effect, carbonation treatment was believed to be one of the available and reliable methods. By carbonation treatment of steel slag, the phases of f-CaO and f-MgO can be effectively transformed into CaCO and MgCO, respectively. This will not only reduce the expansive risk of steel slag to improve the utilization of steel slag further but also capture and store CO due to the mineralization process to reduce carbon emissions. In this study, based on the physical and chemical properties of steel slag, the carbonation mechanism, factors affecting the carbonation process, and the application of carbonated steel slag were reviewed. Eventually, the research challenge was also discussed.
钢渣是钢铁工业的副产品，通常含有大量的游离氧化钙（f-CaO）和游离氧化镁（f-MgO），一旦用作胶凝材料和/或集料，会导致严重的安定性问题。为减轻这种负面影响，碳化处理被认为是可行且可靠的方法之一。通过对钢渣进行碳化处理，f-CaO和f-MgO相可分别有效转化为碳酸钙（CaCO₃）和碳酸镁（MgCO₃）。这不仅会降低钢渣的膨胀风险，进一步提高钢渣的利用率，还会由于矿化过程捕获并封存二氧化碳，从而减少碳排放。在本研究中，基于钢渣的物理和化学性质，对碳化机理、影响碳化过程的因素以及碳化钢渣的应用进行了综述。最后，还讨论了研究面临的挑战。
