Zirconia graphite slide gate plates

Details Zirconia graphite slide gate plates Zirconia graphite slide gate plates

1992-09-14

1994-08-09

Kastler, Scott

Dispensing

Molten metal dispensing

Flow controllers or assists

501104, B22D 4108

Patent

active

053358333

ABSTRACT:
A corrosion and erosion resistant, high strength refractory composition suitable for use as a slide gate valve plate or insert for such plates. The mix for the composition comprises in weight per cent about 87-90 high purity, partially stabilized zirconia; 4-5 silicon metal; 3-12 alumina, 3-5 graphite and 4-7 carbonaceous binder. The mix is pressed to a desired shape and fired in a reducing atmosphere at a temperature in excess of 1000.degree. C. to produce a carbon bonded shape. High purity magnesia and high purity yttria, partially stabilized zirconia materials are employed in the mix to obtain superior hot strength properties.

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