B - Operations – Transporting – 22 – C
Patent
B - Operations, Transporting
22
C
B22C 1/18 (2006.01) B22C 1/08 (2006.01) B22C 9/08 (2006.01) B22D 7/10 (2006.01)
Patent
CA 2158565
A mould for metal casting contains a bonded refractory composition comprising hollow stamina-containing microspheres in which the stamina content is at least 40 % by weight. The mould may be an ingot mould and the bonded refractory composition may be in the form of a sleeve or boards located in the top of the mould or in the head box thereto. The mould may be a sand mould and the bonded refractory composition may be in the form of a sleeve or boards located in a feeder cavity or in the form of a board or pad located so as to constitute a metal casting surface where it is desired to promote directional solidification in cast metal. The bonded refractory composition may also be in the form of a breaker core. In a preferred composition the microspheres contain stamina and silica and the composition may also contain one or more other particulate refractory materials, a readily oxidisable metal, an oxidising agent for the metal and a fluoride salt.
Foseco International Limited
Gowling Lafleur Henderson Llp
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