Intermediate for refining aluminum oxide impurities in steel as well as preparation method and use method thereof
An intermediate, alumina technology, applied in the field of iron and steel metallurgy, can solve the problems of low bulk density, low yield, large specific surface area of nanoparticles, etc., and achieves the effects of low cost, simple process and avoiding energy loss
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Embodiment 1
[0033] Weigh 120 mesh iron powder, aluminum powder and ferric oxide powder according to the mass ratio, wherein the proportion of aluminum powder is 10% of the total weight, the proportion of ferric oxide powder is 30% of the total weight, and the rest is iron powder. The raw material powders were mechanically mixed in a blender for 2 hours, and then 3% of the total mass of zinc stearate was added to bind the powders together. Put the mixture into the mold and press it into an intermediate blank with a size of Φ30×10mm, and the pressing pressure is 40MPa. The intermediate blank is degreased in the degreasing tank to remove the binder medium. The extraction medium is CCl 4 , the extraction time is 1 hour, the intermediate is dried for 1 hour after leaving the tank, and is set aside.
[0034] The intermediate addition test was carried out in the resistance furnace, 1000g steel material was put into the furnace, and then the temperature was raised, the temperature of the molten...
Embodiment 2
[0037] Weigh 200 mesh iron powder, aluminum powder and ferric oxide powder according to the mass ratio, wherein the proportion of aluminum powder is 18% of the total weight, the proportion of ferric oxide powder is 50% of the total weight, and the rest is iron powder. The raw material powders were mechanically mixed in a blender for 2.5 hours, and then 4% of the total mass of zinc stearate was added to bind the powders together. Put the mixture into the mold and press it into an intermediate blank with a size of Φ30×10mm, and the pressing pressure is 60MPa. The intermediate blank is degreased in the degreasing tank to remove the binder medium. The extraction medium is CCl 4 , the extraction time is 2 hours, and the intermediate is dried for 2.5 hours after being out of the tank for use.
[0038] The intermediate addition test was carried out in a 50kg induction furnace. 50kg of steel material was put into the furnace, and then the temperature was raised. The temperature of t...
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