Method for strengthening ferroboron separation and extraction of ferroboron-containing concentrate through suspension reduction roasting
A technology of ferroboron concentrate and ferroboron, which is applied in the field of suspension reduction roasting to strengthen the separation and extraction of boron-containing iron concentrate, can solve the problems of reduced production efficiency, high boron activity, low energy consumption, etc., and achieves improved reduction efficiency, The effect of high reaction temperature and simplified process
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0039] Process such as figure 1 shown;
[0040] The boron-containing iron ore concentrate used contains TFe 54.51% by mass percentage, 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] Grinding the boron-containing iron ore concentrate to a particle size of ≤0.074mm accounts for 80% of the total mass and serves as a raw material;
[0042] The raw material is heated to 800°C, and the boronite is activated and decomposed into Suianite; then it is passed into a reduction reactor and mixed with a reducing gas. The reducing gas is a mixed gas of hydrogen and nitrogen, and the volume percentage of nitrogen in the mixed gas is 20%. ;
[0043] The raw material is in a suspended state under the action of the air flow, and undergoes a reduction reaction with the reducing gas, so that the iron oxide in the raw material is reduced to metallic iron, and the resulting reduced material is discharged from the discharge port of the reduction ...
Embodiment 2
[0049] The boron-containing iron ore concentrate used contains TFe 47.37% by mass percentage, 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] The method is the same as the embodiment, the difference is:
[0051] (1) Grinding the boron-containing iron ore concentrate to a particle size of ≤0.074mm accounts for 65% of the total mass;
[0052] (2) Raw material is heated to 850 ℃, then pass into reduction reactor; Reducing gas is the mixed gas of hydrogen, carbon monoxide and nitrogen, the volume percentage of nitrogen in the mixed gas is 15%, the volume percentage of carbon monoxide is 15%;
[0053] (3) The flow velocity of the reducing gas entering the reduction reactor is 0.18m / s, and the residence time of the raw material in the reduction reactor is 25min; the metallization rate of the reduction material is 91%
[0054] (4) The mass concentration of the pulp is 55%; the addition of sodium hydroxide is based on NaOH and Mg ...
Embodiment 3
[0059] The boron-containing iron ore concentrate used contains TFe 51.88% by mass percentage, 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] The method is the same as the embodiment, the difference is:
[0061] (1) Grinding the boron-containing iron ore concentrate to a particle size of ≤0.074mm accounts for 70% of the total mass;
[0062] (2) Raw materials are heated to 750° C., and then passed into a reduction 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 superficial flow velocity of the reducing gas entering the reduction reactor is 0.12m / s, and the residence time of the raw material in the reduction reactor is 40min; the metallization rate of the reduction material is 89%
[0064] (4) The mass concentration of the pulp is 50%; the amount of sodium hydroxide added is based on NaOH and Mg 2 B 2 o 5 1.3 times of the the...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More