Assessment of the natural absorption of CO2 performed by steelmaking slag

Special Issue on ‘Advances in Steel Technologies’, edited by Carlo Mapelli, Silvia Barella and Riccardo Carli

Open Access

Table 3

Measurements of CO₂ concentration (and its conversion to C) based on ELTRA-CS elemental analysis on the slag coming from EAF (day 0 accounts for the CO₂ (and C) concentration measured when the samples were received). Values for standard deviation (St. Dev.) are for CO₂ and C, respectively.

		Steel plant 1				Steel plant 2				Steel plant 3				Steel plant 4				Steel plant 5

Fraction	time [days]	CO₂ [wt.%]	C [wt.%]	St. Dev. [wt.%]		CO₂ [wt.%]	C [wt.%]	St. Dev [wt.]		CO₂ [wt.%]	C [wt.%]	St. Dev. [wt.%]		CO₂ [wt.%]	C [wt.%]	St. Dev. [wt.%]		CO₂ [wt.%]	C [wt.%]	St. Dev. [wt.%]
As received	0	0.85	0.23	0.011	0.003	0.73	0.31	0.019	0.005	0.16	0.04	0.003	0.001	1.50	0.41	0.011	0.003	0.19	0.05	0.003	0.001
	30	0.54	0.15	0.013	0.004	0.59	0.16	0.031	0.008	0.20	0.05	0.008	0.002	1.33	0.36	0.016	0.004	0.20	0.05	0.005	0.001
	90	0.68	0.19	0.039	0.011	0.72	0.20	0.011	0.003	0.18	0.05	0.010	0.003	2.52	0.69	0.031	0.008	0.29	0.08	0.019	0.005
	180	0.77	0.21	0.023	0.006	0.92	0.25	0.014	0.004	0.24	0.06	0.005	0.001	2.65	0.72	0.067	0.018	0.43	0.12	0.051	0.014
< 1mm	0	0.38	0.10	0.024	0.007	4.24	1.16	0.012	0.003
	30	1.19	0.33	0.010	0.003	4.42	1.21	0.018	0.005
	90	1.23	0.34	0.017	0.005	4.78	1.30	0.035	0.009
	180	1.45	0.40	0.010	0.003	6.08	1.66	0.018	0.005

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