Carbon composite fireproof material for blast furnace iron runner and preparation method thereof
A technology of refractory material and molten iron ditch is applied in the field of castables, which can solve the problems of increasing the amount of water added to the castables, increasing the porosity, and easy oxidation of flake graphite, and achieving the effect of increasing the service life and stable volume.
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[0056] Through specific embodiment below:
[0057] The present invention is described further and adopts following technical scheme:
[0058] Material preparation, the sum of graphite (C) metal Al, Si, SiC non-oxide, and the sum of corundum, magnesia, vf-SiO2 oxide, 1:1 preparation. Add 10% (percentage by weight) of silica sol.
[0059] a. Mixing
[0060] Graphite has a light density, and it is easy to float on the top of the mixture during mixing, so that it does not completely contact with other components in the ingredients. Mix with a forced mixer. Pay attention to the order of adding materials and mixing time.
[0061] The order is: corundum, magnesia mixture → binder → graphite → silicon micropowder and additive mixed powder.
[0062] Time: master moderately. If the time is short, the wrapping will not be good and uneven; if the time is long, it will dry out due to the volatilization of the solvent, and the graphite and fine powder will fall off. It is ad...
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