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Silicon Carbide Crucible
  • Custom processing silicon carbide graphite crucible for brass copper Aluminum smelting
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Silicon Carbide Crucible, 8Kg Silicon Carbide Graphite Crucible

The invention discloses a raw materials composition for a graphite/silicon carbidecrucible. The following raw materials are ranked by weight: 40% to 50% flake graphite; 20% to 50% silicon carbide; 4% to 10% elemental silicon powder; 1% to 5% boron carbide powder and 5% to 15% clay.

The manufacturing of graphite-silicon-carbid crucibles involves the following steps: mixing the raw materials evenly and making qualified mud material; loading the qualified materials into molds; pressing and shaping blanks; drying blanks and coating them with anti-oxidation glaze. Finally, burn the blanks nakedly so that the glaze melts into glass glaze. Inspection and qualification of blanks is done. The invention's process is straightforward. The prepared crucible has a uniform texture, is high in heat conduction and low air hole rates.

Clay-plumbago crucible for non-ferrous metals such as melting gold and silver, copper, aluminium, zinc and alloys thereof, as far back as the thirties in 20th century, just produced, production method is through pulverizing, batching, manual spinning or roller-compaction raw material, be dried, burn till, brush oil moistureproof, with graphite, clay, pyrophyllite grog, or bauxite chamotte, simple substance silica flour, or ferrosilicon powder is antioxidant, and water forms according to certain ratio proportioning.Afterwards, with the silicon carbide of part, replaced bauxite chamotte, to improve quality, increased thermal conductivity.This method production process is complicated, and blank needs slowly to dry, and consumes the energy many, and work in-process loss is large, and distortion is many, the production cycle long.

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