B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/188
B22D 7/00 (2006.01) B22D 7/10 (2006.01) B22D 7/12 (2006.01)
Patent
CA 1058379
A B S T R A C T The surface quality of ingots may be improved by bottom-pouring molten metal into an ingot mould wherein there is located in the ingot mould, prior to the commencement of pouring, a multi-layered board having a first layer which is a preformed slab comprising an anti- piping composition including an exothermic material and a second layer adjacent the first layer which is a preformed slab comprising a fluxing agent, a fibrous material and a binder, the second layer having a central cavity therein filled with a preformed refractory slab comprising a refractory material, a fibrous material and a binder, the slabs being arranged such that the refractory slab is enclosed within the board, and the board being located in the mould with the first layer uppermost. The board acts as both a mould additive and as an anti-piping compound.
234670
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