Sliding closure unit

Details Sliding closure unit Sliding closure unit

1981-08-12

1983-07-05

Scherbel, David A.

Dispensing

Molten metal dispensing

Flow controllers or assists

222600, B22D 4108

Patent

active

043913920

ABSTRACT:
A sliding closure unit for selectively discharging liquid melt from a liquid melt container includes a stationary refractory plate and a sliding refractory plate, the two refractory plates having complementary, abutting relative sliding surfaces. The stationary refractory plate consists essentially of a substantially non-wettable material having a Mohs' hardness of from 1 to 2, a thermal conductivity of greater than 40 W/km at 700.degree. C. and a crushing strength of not greater than 25 N/mm.sup.2 at about room temperature. The sliding refractory plate consists essentially of a substantially non-porous material having a Mohs' hardness of from 6 to 7, a thermal conductivity of less than 3 W/km at 700.degree. C. and a crushing strength of greater than 300 N/mm.sup.2 at approximately room temperature.

REFERENCES:
patent: 3511261 (1970-05-01), Bick et al.
patent: 3831825 (1974-08-01), Kutzer et al.
The Iron Age; Jul. 19, 1928, p. 155, "Ladle Nozzle Made of Two Materials".

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