Metalurgija, Vol. 57 No. 4, 2018.
Izvorni znanstveni članak
Kinetics of pellet reduced by H2 and the mixture of CO and H2
S. Geng
; School of Materials Science and Engineering, Shanghai University, China
H. Zhang
; School of Materials Science and Engineering, Shanghai University, China
W. Ding
; School of Materials Science and Engineering, Shanghai University, China
Y. Yu
; School of Materials Science and Engineering, Shanghai University, China
Sažetak
Canadian hematite acid pellet with low magnetite and olivine contents were isothermally reduced by hydrogen and carbon monoxide at 600 to 1 000 °C. Pellet reduction was investigated by a thermo gravimetric analysis measuring oxygen weight loss as a function of time. Then macroscopic and microscopic examinations, X-ray and carbon analyses were also used to elucidate the mechanisms of pellet reduction. Activation energy is around 27 kJ/mol for H2 atmospheres and is about 15 kJ/mol for the mixture of H2 and CO. Carbon producing from CO disproportionation reaction performs a catalyzer at the final reduction of pellet.
Ključne riječi
iron; direct reduced; H<sub>2</sub>-CO mixture; thermo gravimetric analysis; X-ray examination
Hrčak ID:
201560
URI
Datum izdavanja:
1.10.2018.
Posjeta: 1.895 *