CO2 sequestration exploration utilizing converter slag and cold-rolling waste water: The effect of carbonation parameters

The exploration of carbonation routine utilizing BOFs, CRW and CO2 has a significant effect on terminated treatment of metallurgical wastes resourceful disposal at a low cost. This paper investigated the collaborative effect of CRW composition on slag carbonation degree and CRW decalcification rate in CO2 sequestration system, furthermore, the effect of reaction time etc. on both were also discussed under optimal composition. Moreover, the carbonation process was simulated by Aspen software for comparing with the experimental results. The results showed that slag carbonation degree and CRW decalcification rate increased as CRW hardness increased, and kept stable. The optimal calcium conversion was 50.4 %, corresponding to 15.9g CO2/100g slag, and the decalcification rate was 87.1 %, respectively, at 80 C and 10 L/kg for 60 min. The Aspen simulation results showed the correlation degrees were 0.94 for calcium conversion and 0.98 for decalcification rate. (C) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.