A method for suspension reduction roasting to strengthen the separation and extraction of boron and iron from boron-containing iron concentrate
A technology for boron iron concentrate and boron iron, which is applied in the field of suspension reduction roasting to strengthen the separation and extraction of boron-containing iron concentrate and iron boron, can solve the problems of reduced production efficiency, high boron activity, short process, etc., and achieves improved reduction efficiency and reaction The effect of high temperature and long time
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Embodiment 1
[0039] Process figure 1 Indicated;
[0040] The boron-containing iron-containing concentrate contains TFE 54.51%, B 2 O 3 4.82%, SIO 2 3.88%, Al 2 O 3 0.31%, CaO 0.21%, MgO 9.97%, P 0.10%, S 1.33%;
[0041] The portion of the boron-containing iron concentrate is frozen to a particle size of ≤0.074 mm accounts for 80% of the total mass, as a raw material;
[0042] The raw material was heated to 800 ° C, and the boron magnesium stones were decomposed into 安 石; the reduction reactor, mixed with the reducing gas, a mixed gas of hydrogen and nitrogen, and the volume of nitrogen in the mixed gas 20% ;
[0043] The raw material is in a suspension under gas flow, and reacts with the reducing gas, so that the iron oxide in the raw material is reduced as a metal iron, and the generated reduction material is discharged from the discharge of the reactor; reducing gas first from After the intake port at the bottom of the reactor is passed, the feedstock is accessed from the feed port of the lo...
Embodiment 2
[0049] The boron-containing iron-containing concentrate contains TFE 47.37%, B 2 O 3 6.73%, SIO 2 6.01%, Al 2 O 3 0.27%, CaO 0.31%, MgO 12.65%, P 0.08%, S 1.37%;
[0050] Methods The same embodiments are:
[0051] (1) Part of the total mass of 65% of the total mass of the boron-containing ferrous concentrate to the particle size of ≤ 0.074 mm;
[0052] (2) Heat the raw material to 850 ° C, then enter the reducing reactor; the reducing gas is hydrogen gas, a mixed gas of hydrogen, carbon monoxide and nitrogen, and a percentage of nitrogen in the mixed gas 15%, and the volume percentage of carbon monoxide is 15%;
[0053] (3) The flow rate of the reducing gas entering the reducing reactor is 0.18 m / s, and the raw material is 25 min within the reduced reactor; the metalization rate of the reduction material is 91%.
[0054] (4) The mass concentration of the pulp is 55%; the addition of sodium hydroxide is added according to NaOH and Mg. 2 B 2 O 5 1.1 times the required theoretical ...
Embodiment 3
[0059] The boron-containing iron-containing concentrate contains TFE 51.88%, B 2 O 3 5.82%, SIO 2 5.46%, Al 2 O 3 0.48%, CaO 0.53%, MgO 14.87%, P 0.09%, S 0.99%;
[0060] Methods The same embodiments are:
[0061] (1) Section part of the boron-containing iron concentrate to particle size ≤0.074 mm accounts for 70% of total quality;
[0062] (2) Heat the raw material to 750 ° C, then enter the reducing reactor; the reducing gas is a mixed gas of hydrogen and nitrogen, and the volume percentage of nitrogen in the mixed gas is 15%;
[0063] (3) The apparent flow rate of the reducing gas entering the reducing reactor is 0.12 m / s, and the raw material is 40 min within the reduction reactor; the metalization rate of the reduction material is 89%.
[0064] (4) The mass concentration of the slurry is 50%; the addition of sodium hydroxide is added according to NaOH and Mg. 2 B 2 O 5 1.3 times the theoretical amount required for full reactions;
[0065] (5) Part of the grinding to solid p...
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