A biochar-containing composite iron ore pellet for microwave reduction and its preparation and application
A technology for compounding iron ore and biochar, applied in the field of iron and steel metallurgy, can solve the problems of unsatisfactory performance index of green balls, poor reducibility, etc., to improve iron grade, metallization rate and reduction degree, improve performance, and excellent green ball performance. Effect
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Embodiment 1
[0082] Magnetite powder 1 (accounting for total magnetite powder mass ratio 60%, specific surface area 1716cm 2 / g), magnetite powder 2 (accounting for total magnetite powder mass ratio 30%, specific surface area 903cm 2 / g), biochar, bentonite and water mix uniformly to form mixture A; in the control mixture A, the mass ratio of the carbon element of biochar and the iron element of magnetite powder is 0.26: 1, and the addition of bentonite is 2.3% of the quality of the magnetite powder, and the addition of water is 6% of the quality of the mixture A.
[0083] Magnetite powder 1 (accounting for total magnetite powder mass ratio 10%, specific surface area 1716cm 2 / g), bentonite and water mix uniformly to form mixture B; in mixture B, the add-on of bentonite is 2.3% of the magnetite powder quality, and the add-on of water is 6% of the quality of mixture B.
[0084] First, add mixture A to the disc pelletizer to make a spherical core, control the growth time of the mother core...
Embodiment 2
[0089] Magnetite powder 1 (accounting for total magnetite powder mass ratio 60%, specific surface area 1744cm 2 / g), magnetite powder 2 (accounting for total magnetite powder mass ratio 30%, specific surface area 988cm 2 / g), biochar, bentonite and water mix uniformly to form mixture A; in the control mixture A, the mass ratio of the carbon element of biochar and the iron element of magnetite powder is 0.28: 1, and the addition of bentonite is 2.1% of the quality of the magnetite powder, and the addition of water is 6% of the quality of the mixture A.
[0090] Magnetite powder 1 (accounting for total magnetite powder mass ratio 10%, specific surface area 1744cm 2 / g), bentonite and water mix uniformly to form mixture B; in mixture B, the add-on of bentonite is 2.1% of the magnetite powder quality, and the add-on of water is 6% of the quality of mixture B.
[0091] First, add mixture A to the disc pelletizer to make a spherical core, control the growth time of the mother core...
Embodiment 3
[0096] Magnetite powder 1 (accounting for total magnetite powder mass ratio 60%, specific surface area 1732cm 2 / g), magnetite powder 2 (accounting for total magnetite powder mass ratio 30%, specific surface area 970cm 2 / g), biochar, bentonite and water mix uniformly to form mixture A; in the control mixture A, the mass ratio of the carbon element of biochar and the iron element of magnetite powder is 0.31: 1, and the add-on of bentonite is 2.5% of the quality of the magnetite powder, and the addition of water is 6% of the quality of the mixture A.
[0097] Magnetite powder 1 (accounting for total magnetite powder mass ratio 10%, specific surface area 1732cm 2 / g), bentonite and water mix uniformly to form mixture B; in mixture B, the add-on of bentonite is 2.5% of the magnetite powder quality, and the add-on of water is 6% of the quality of mixture B.
[0098] First, add mixture A to the disc pelletizer to make a spherical core, control the growth time of the mother core t...
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