Rotary hearth furnace iron-making method utilizing biomass carbon-containing pellet to serve as raw material
A biomass and rotary hearth furnace technology, applied in the direction of furnaces, furnace types, fluidized bed furnaces, etc., can solve the problems of large consumption of fossil energy such as coal, low process thermal efficiency and productivity, and high sulfur content in products, so as to improve thermal efficiency and productivity, improvement of process thermal efficiency, and improvement of smelting efficiency
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Embodiment 1
[0026] The dried waste wood was carbonized in a carbonization furnace at 500°C for 40 minutes to obtain biomass coke (M=1.20%, A=0.75%, V=16.50%, FC=81.55%), which was crushed and sieved to less than 150 μm. According to C / O=1.15, mix a certain amount of magnetite powder with a grade of 65% and biomass coke powder, add 3% of bentonite binder and 6% of the total mass of water, and mix well to make carbon-containing spheres The pellets were dried and placed in a rotary hearth furnace for reduction. The reduction temperature was 1280°C and the reduction time was 25 minutes. Metallized pellets with a metallization rate of 80% and a sulfur content of 0.007% were obtained.
Embodiment 2
[0028] The dried waste wood was carbonized in a carbonization furnace at 600°C for 50 minutes to obtain biomass coke (M=0.80%, A=0.85%, V=12.50%, FC=85.85%), which was crushed and sieved to less than 150 μm. According to C / O=1.25, mix a certain amount of hematite powder with a grade of 60% and biomass coke powder, add 2.5% of bentonite binder and 7% of the total mass of water, and mix well to make carbon-containing spheres The pellets were dried and placed in a rotary hearth furnace for reduction. The reduction temperature was 1350°C and the reduction time was 35 minutes. Metallized pellets with a metallization rate of 85% and a sulfur content of 0.009% were obtained.
Embodiment 3
[0030] The dried waste wood was carbonized in a carbonization furnace at 700°C for 30 minutes to obtain biomass coke (M=0.75%, A=0.95%, V=12.30%, FC=86.00%), which was crushed and sieved to less than 150 μm. According to C / O=1.20, mix a certain amount of iron-containing powder with a grade of 55% and biomass coke powder, add 3.5% bentonite binder and 6.5% water in total mass, and mix well to make carbon-containing spheres The pellets were dried and placed in a rotary hearth furnace for reduction. The reduction temperature was 1300°C and the reduction time was 30 minutes. Metallized pellets with a metallization rate of 82% and a sulfur content of 0.008% were obtained.
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