Method for sealed system of hot tops, ingot moulds or a combination of ingot mould and hot top and an arrangement for said sealed system

摘要

The invention relates to a method of casting metals or metal alloys in an ingot mould provided with a desired type of hot top, whereby the pipe reducing effect of the hot top is further enhanced by means of applying a layer of granulated or powdered heat radiation retarding material above the ingot mould after completion of the teeming of the metal. The pipe reducing means is included in a sealed system for hot tops, moulds and the like. The heat radiation retarding means is sealed in a heat combustible or burstable casing in said pipe reducing means and is removed at a suitable time by means of suction prior to the removal of the ingot from the mould and is collected in a suitable container for reuse.