The scrap of critical quality, e.g. rusty used scrap or galvanized steel scrap (in the form of the car body sheets) can be without problems used when melting cast iron in the crucible induction great power furnaces. But the attention shall be payed to the fact that the charging and operation of the furnace must be matched to the melting way of the given scrap. From the furnace side decisive is here the bath motion because of the need of gases elimination from it by he rapid melting. The construction of the furnace and the technology of melting in it shall be optimally designed taking into account the requirements of such a scrap. This concerns the furnace geometry from the point of view of the coil height and the bath level as regards the coil height. The power and frequency must be, besides, matched to the bath motion, optimal for the assumed metallurgical task. By using the galvanized scrap special attention must be payed to the charging sequence of the charge components as well as to the effective dust removal installation.
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