Biochar-containing iron ore pellets and preparation method thereof
A technology of biochar and iron ore balls, which is applied in the field of iron and steel metallurgy, can solve problems such as compression resistance, low drop strength, weak binding force, and weak hydrophilicity, and achieve optimized composition and formation process, low dosage, and improved Effects of compressive and drop strength
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Embodiment 1
[0059] Mix magnetite powder, biochar, bentonite and water evenly to form mixed material A; control the mass ratio of the carbon element of biochar to the oxygen element of magnetite powder in mixed material A to be 1.05:1; the addition of bentonite The amount is 3wt% of the mass of the magnetite powder, and the addition of water is 6wt% of the mass of the mixed material A.
[0060] The magnetite powder, bentonite and water are mixed evenly to form a mixed material B; in the mixed material B, the amount of bentonite added is 3 wt% of the mass of the magnetite powder, and the added amount of water is 6 wt% of the quality of the mixed material B.
[0061] First add the mixture material A to the pelletizer to make the inner layer sphere, control the inner layer nucleation time to 3min, the inner layer growth time to 4min, control the diameter of the inner layer ball to 9mm, then add the mixture material B to control the outer layer The growing time is 2 minutes, and the compacting...
Embodiment 2
[0064] The magnetite powder, biochar, bentonite and water are milled for 5 minutes, and the milling speed is 600r / min to form a mixed material A; in the mixed material A, the mass ratio of the carbon element of the biochar to the oxygen element of the magnetite powder is controlled The ratio is 1.3:1; the added amount of bentonite is 2.5wt% of the mass of magnetite powder, and the added amount of water is 7wt% of the mass of mixed material A.
[0065] The magnetite powder, bentonite and water are milled for 5 minutes, and the milling speed is 600r / min to form a mixture B; in the mixture B, the addition of bentonite is 2.5wt% of the magnetite powder quality, and the addition of water is 7wt% of the mass of the mixed material B.
[0066] First add the mixture material A to the pelletizing machine to make the inner layer sphere, control the inner layer nucleation time to 2min, the inner layer growth time to 3min, control the diameter of the inner layer ball to 9mm, then add the m...
Embodiment 3
[0069] Mix magnetite powder, biochar, bentonite and water evenly to form mixed material A; control the mass ratio of the carbon element of biochar to the oxygen element of magnetite powder in mixed material A to be 0.95:1; the addition of bentonite The amount is 3.5wt% of the mass of the magnetite powder, and the amount of water added is 6wt% of the mass of the mixed material A.
[0070]Mix magnetite powder, bentonite and water evenly to form a mixture B; in the mixture B, the amount of bentonite added is 3.5wt% of the quality of the magnetite powder, and the amount of water added is 6wt% of the quality of the mixture B .
[0071] First add the mixture material A to the pelletizing machine to make the inner layer sphere, control the nucleation time of the inner layer to 3 minutes, the growth time of the inner layer to 4 minutes, control the diameter of the inner layer ball to 8mm, then add the mixture material B to control the outer layer The growing time is 2 minutes, and th...
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