This study aims to develop the limestone calcined clay (LC3) as a low-carbon treatment to immobilize waste ferronickel slag (FNS) containing heavy metals. The results indicate that the ordinary portland cement (OPC) and limestone calcined clay cement (LC3) adequately immobilized the Chromium (Cr), with the leaching results of 0.10–0.30 mg/L. The LC3 cement provided superior Mn immobilization (lower than 5 mg/L) compared to OPC. Calcium aluminum silicate hydrate (C-A-S-H) and ettringite (AFt) were the two main hydrated products of LC3 that ensure the capacity to encapsulate metals. The LC3 specimens had the lower porosity between 50 and 10,000 nm compared to that of OPC. The Embodied Energy (EE) and Embodied Carbon Emissions (ECO₂e) of per m³ LC3 remarkably decreased by 38.21% and 44.77%.

这项研究旨在开发石灰石煅烧粘土（LC3）作为低碳处理方法，以固定含有重金属的废镍铁渣（FNS）。结果表明，普通硅酸盐水泥（OPC）和石灰石煅烧粘土水泥（LC3）充分固定了铬（Cr），浸出结果为0.10–0.30 mg / L。与OPC相比，LC3水泥具有更高的Mn固定率（低于5 mg / L）。水合硅酸铝钙（CASH）和钙矾石（AFt）是LC3的两个主要水合产物，可确保包封金属的能力。与OPC相比，LC3样品的孔隙率在50至10,000 nm之间。每m ³的体现能量（EE）和体现碳排放量（ECO ₂ e） LC3分别下降38.21％和44.77％。