Theoretical and Experimental on Carbon Dioxide Sequestration Degree of Steel Slag

The limitation and experimental CO 2 sequestration degree of steel slag is the focus. The theoretical and the practical CO 2 sequestration degree was assessed under mild operating conditions. After calculation in theory, it can be found that the CO 2 sequestration limitation degree for every kilogram steel slag is about 442 g when taking magnesium into consideration, and the experimental CO 2 sequestration degree for every kilogram slag is about 77 g, under the conditions that the liquid to solid ratio is 50 L/kg, CO 2 flow is 0.5 L/min and the temperature of reaction is the ambient temperature. When solution NH 6 Cl and CH 3 COOH for experiments and other conditions keep the same, the actual potential CO 2 sequestration for every kilogram slag is 69.3 g and 31.20 g respectively. Thus, optimization of process parameters like granularity of slag is necessary to enhance the carbon dioxide sequestration degree for steel slag.