Composite magnesia carbon brick and preparation method thereof
A technology of composite magnesia-carbon bricks and magnesia-carbon bricks, which is applied in the field of refractory materials, can solve problems such as weak oxidation resistance and undisclosed apparent porosity of magnesia-carbon bricks, and achieve parameters such as improvement, pressure/bending resistance improvement, and improvement The effect of bulk density
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Embodiment 1
[0042] The composite magnesia-carbon brick of the present embodiment includes the following raw materials in parts by weight:
[0043] Waste magnesia carbon brick: 25 parts, specifications: MgO95%, SiO 2 Content ≤ 2.0%, apparent porosity ≤ 25%, moisture ≤ 0.5%,
[0044] Magnesia: 75 parts, purity: 99%,
[0045] Graphite: 5 parts, the carbon content of the graphite is >95%, and the water content is ≤0.5%,
[0046] Alabaster: 10 parts, moisture ≤0.5%,
[0047]Slag powder: 6 parts, moisture ≤0.5%,
[0048] Phenolic resin; 5 parts, solid content ≥ 90%,
[0049] Epoxy resin: 1 part, solid content ≥ 90%,
[0050] Furan resin: 2 parts, solid content ≥ 90%,
[0051] Polyvinylpyrrolidone: 1 part, purity: 95%,
[0052] Additives: 2 parts;
[0053] Wherein the additives include SiC-Al 2 o 3 Composite powder, zirconia powder, potassium sulfate powder and bentonite,
[0054] The SiC-Al 2 o 3 The weight ratio among the composite powder, the zirconia powder, the potassium sulfat...
Embodiment 2
[0069] Present embodiment is basically the same as embodiment 1, and difference is:
[0070] The composite magnesia carbon brick includes the following raw materials in parts by weight:
[0071] Waste magnesia carbon brick: 35 parts,
[0072] Magnesia: 65 parts,
[0073] Graphite: 10 parts,
[0074] Alabaster: 5 parts,
[0075] Slag powder: 8 parts,
[0076] phenolic resin; 3 parts,
[0077] Epoxy resin: 2 parts,
[0078] Furan resin: 1 part,
[0079] Polyvinylpyrrolidone: 2 parts,
[0080] Additives: 1 part.
Embodiment 3
[0082] Present embodiment is basically the same as embodiment 1, and difference is:
[0083] The composite magnesia-carbon brick includes the following raw materials in parts by weight: waste magnesia-carbon brick: 30 parts,
[0084] Magnesia: 70 parts,
[0085] Graphite: 8 parts,
[0086] Alabaster: 8 parts,
[0087] Slag powder: 7 parts,
[0088] phenolic resin; 3 parts,
[0089] Epoxy resin: 2 parts,
[0090] Furan resin: 1 part,
[0091] Polyvinylpyrrolidone: 2 parts,
[0092] Additives: 2 parts.
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