Advancing hydrogen plasma smelting reduction: Experimental insights from a pilot plant

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

Open Access

Table 3

Composition of the obtained slag and metal phases.

		Trial no. 1	Trial no. 2	Trial no. 3	Trial no. 4	Trial no. 5
Slag composition [wt.%]	Fe total	65.53	61.41	52.92	53.71	39.50
	Fe metallic	3.86	9.53	1.70	2.88	1.78
	FeO	61.47	60.25	37.25	42.60	42.04
	Fe₂O₃	19.86	7.49	31.83	25.29	7.36
	P₂O₅	0.04	0.34	0.09	0.10	0.15
	S	0.03	0.04	0.01	0.02	< 0.01
	CaO	1.51	3.61	8.00	8.13	14.32
	MgO	1.25	2.52	4.83	6.19	13.51
	SiO₂	2.28	4.93	8.68	9.18	13.75
	Al₂O₃	2.87	9.60	4.42	1.81	2.97

	B₄ slag	0.54	0.42	0.98	1.30	1.67

Regulus composition [wt.%]	Fe	No spark optical emission	No spark optical emission	99.8	99.8	99.9
	C	spectrometer analysis possible	spectrometer analysis possible	0.0159	0.0117	< 0.0010
	Si			< 0.0050	0.0112	< 0.0010
	Mn			0.0204	0.0204	0.0098
	P			0.0057	0.0052	0.0060
	S			0.0059	0.0054	0.0054

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