Parts subject to wear which come into contact with metal melts

Details Parts subject to wear which come into contact with metal melts Parts subject to wear which come into contact with metal melts

1976-08-13

1980-07-15

Ansher, Harold

Stock material or miscellaneous articles

Composite

Of metal

106 89, 106 97, 106104, 106120, 106121, 428404, 428468, 428539, C04B 732, C04B 734, C04B 900, B32B 1504

Patent

active

042129265

ABSTRACT:
Parts subject to wear, which come into contact with metal melts, are formed with a hydraulically setting high-alumina refractory concrete having a compression strength when cold, measured on dried crude product, of at least 400 kp/cm.sup.2. The compression strength is at least 700 kp/cm.sup.2 after firing at 1400.degree. C. The refractory concrete has a dimensional stability at 1400.degree. C. of at least plus or minus 0.2%. The refractory concrete contains corundum and active alumina as aggregates, an alumina concrete containing less than 22% lime and, as required, a thinning agent. Up to 5% of the aggregates can be replaced by a spinel-forming substance preferably MgO or MgO-yielding compounds; or up to 5% of the aggregates can be replaced by carbon black, pitch or graphite; or up to 7% of the aggregates can be replaced by chromium oxide. Aggregates under 0.5 mm can be present in the refractory concrete as round grains. Preferably, the refractory concrete is used for slide-valve plates and/or base plates of slide-valve closure members on containers containing steel melts. The moulded parts can be impregnated with tar.

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patent: 3923531 (1975-12-01), Parsons et al.
patent: 3963849 (1976-06-01), Thompson
patent: 3995086 (1976-11-01), Plunguian et al.
patent: 4004052 (1977-01-01), Bystrova et al.
patent: 4009308 (1977-02-01), Tadashi et al.
patent: 4011094 (1977-03-01), Burley
patent: 4011355 (1977-03-01), Mandish et al.
patent: 4026716 (1977-05-01), Urschel et al.

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