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 4

Measurements of CO₂ concentration (and its conversion to C) based on LECO-CS elemental analysis on the slag coming from LF (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	2.00	0.54	0.019	0.005	1.02	0.28	0.033	0.009	1.27	0.35	0.048	0.013	0.32	0.09	0.005	0.001	1.19	0.33	0.031	0.008
	30	2.92	0.80	0.018	0.005	3.08	0.84	0.021	0.006	2.49	0.68	0.028	0.008	0.97	0.26	0.016	0.004	1.27	0.35	0.016	0.004
	90	4.17	1.14	0.004	0.001	6.55	1.79	0.123	0.033	3.98	1.09	0.022	0.006	1.94	0.53	0.030	0.008	2.33	0.64	0.029	0.008
	180	5.77	1.58	0.025	0.007	7.14	1.95	0.015	0.004	4.22	1.15	0.013	0.003	3.01	0.82	0.006	0.001	2.72	0.74	0.048	0.013
< 1mm	0	1.91	0.52	0.000	0.000	1.43	0.39	0.072	0.019	1.34	0.36	0.017	0.005	0.25	0.07	0.012	0.003	2.32	0.63	0.004	0.001
	30	2.90	0.79	0.006	0.002	4.62	1.26	0.094	0.025	2.89	0.79	0.006	0.002	0.97	0.26	0.010	0.003	3.63	0.99	0.020	0.006
	90	4.18	1.14	0.042	0.011	7.63	2.08	0.029		4.50	1.23	0.009		1.95	0.53	0.030		4.69	1.28	0.002
	180	5.66	1.55	0.021	0.006	10.00	2.73	0.028		5.48	1.50	0.052		2.99	0.82	0.050		6.25	1.71	0.020

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