| 摘要 |
Methods and processes for stabilizing a ground slag produced from a steelmaking operation. Optionally, a CO2-containing gas may be contacted with a an aqueous absorption solution in presence of a biocatalyst, in a reactor, for enzymatically catalyzing a hydration reaction of dissolved CO2 into bicarbonate ions and hydrogen ions to produce an ion loaded solution and a CO2 lean gas. The ion loaded solution is then contacted with the ground slag to produce CaCO3, MgCO3, a stabilized slag depleted in CaO and MgO, and an alkaline liquor comprising carbonate ions CO3 2-. Alternatively, the ground slag may be contacted with water to leach CaO and MgO and produce a slurry containing Ca(OH)2 and Mg(OH)2, which is contacted with the ion loaded solution to produce CaCO3 and MgCO3 and the stabilized slag depleted in CaO and MgO. |
