초록 ▼

A method of electroslag refining of metal is taught. The method includes the introduction of unrefined metal into an electroslag refining process in which the unrefined metal is first melted at the upper surface of the refining slag. The molten metal is refined as it passes through the molten slag.

A method of electroslag refining of metal is taught. The method includes the introduction of unrefined metal into an electroslag refining process in which the unrefined metal is first melted at the upper surface of the refining slag. The molten metal is refined as it passes through the molten slag. The refined metal is collected in a cold hearth apparatus having a skull of refined metal formed on the surface of the cold hearth for protecting the cold hearth from the leaching action of the refined molten metal. A cold finger bottom pour spout is formed at the bottom of the cold hearth to permit dispensing of molten refined metal from the cold hearth. The flow rate of molten metal through the cold finger apparatus is controlled by coordinating, among other parameters: the rate of melting of the unrefined metal; the hydrostatic head of molten metal and slag above the bottom pour cold finger orifice; the rate of induction heat supplied to the metal within the cold finger apparatus; the rate of heat removal from the metal within the cold finger apparatus through the cold finger apparatus itself and through adjacent gas cooling means; and by applying electromagnetic force to selectively speed up, slow down and/or interrupt the flow of metal through the cold finger apparatus via an electromagnetic orifice, preferably utilizing a processor, such as a computer.

대표청구항 ▼

A method of refining a metal ingot comprising: electroslag refining said ingot to produce a discharge stream of refined liquid metal; injecting an atomization gas to impinge said stream for spray forming a solidified deposit thereof on a billet; and dynamically varying discharge flow rate of said st

A method of refining a metal ingot comprising: electroslag refining said ingot to produce a discharge stream of refined liquid metal; injecting an atomization gas to impinge said stream for spray forming a solidified deposit thereof on a billet; and dynamically varying discharge flow rate of said stream at a plurality of cycles per second relative to a flow rate of said atomization gas to correspondingly vary gas-to-metal ratio therebetween.