Abstract:
An apparatus and method for reducing consumption of a cleaning solution used in cleaning oxidized hot metal surfaces of continuously cast and rolled metal rod are disclosed. A blast of air is applied to the metal surface with an airwipe device (36) so as to remove droplets of the solution used in cleaning the oxidized metal surface, the removed droplets are collected in an enclosure or box (18), and are received and recovered in a storage tank (20). A liquid trap (19) is provided in a drain connecting the box (18) to the storage tank (20) so as to prevent exhaustion of air into the storage tank (20) and carrying away of volatile components of the cleaning solution.
Abstract:
Disclosed is a multiple chamber vertical shaft furnace for melting granulated metal. Granulated scrap metal, high-grade crystalline ore or a combination thereof is preheated and sintered into a coherent columnar mass by the present invention. It is then melted in an enlarged melting chamber by multiple burners located in the walls of the furnace which direct heat tangent to the coherent columnar mass in a tubular heating space between the outer surface of the coherent columnar mass and the inner surface of the furnace walls, and flows out of the present invention through a tapping outlet for further processing.
Abstract:
An improved vertical furnace for melting metal pieces, such as pieces of copper cathode. The furnace has a generally round interior wall of refractory brick material which encloses a vertical melting chamber having a plurality of burner openings through the refractory wall. Heat, being injected through these openings by means of a novel burner design, melts the metal pieces under metallurgically controlled conditions. The burners are arranged near the bottom floor of the melting chamber which is sloped toward a single outlet thus allowing the molten metal to continuously drain from the melting chamber. The burners are fed a mixture of fuel and air from a plurality of remote mixing stations so as to reduce turbulence at the burners thereby significantly reducing the operating noise level and refractory wear compared to prior art furnaces. A combustion chamber between the burner and the melting chamber is provided so as to prevent entry of uncombusted fuel and/or air, thereby maintaining the closely controlled atmosphere in the melting chamber.
Abstract:
An improved vertical furnace for melting metal pieces, such as pieces of copper cathode. The furnace has a generally round interior wall of refractory brick material which encloses a vertical melting chamber having a plurality of burner openings through the refractory wall. Heat, being injected through these openings by means of a novel burner design, melts the metal pieces under metallurgically controlled conditions. The burners are arranged near the bottom floor of the melting chamber which is sloped toward a single outlet thus allowing the molten metal to continuously drain from the melting chamber. The burners are fed a mixture of fuel and air from a plurality of remote mixing stations so as to reduce turbulence at the burners thereby significantly reducing the operating noise level and refractory wear compared to prior art furnaces. A combustion chamber between the burner and the melting chamber is provided so as to prevent entry of uncombusted fuel and/or air, thereby maintaining the closely controlled atmosphere in the melting chamber.
Abstract:
A method and burner apparatus for heating and continuously melting a non-ferrous material charge, such as copper pieces in a furnace without contaminating the material charge in the furnace with non-vaporized liquid fuel thereby maintaining the metallurgical quality of the non-ferrous material charge.
Abstract:
Hot-formed rod is prepared in a rolling mill by removing oxide from the surface of a nascent cast bar while the bar is in a non-oxidizing environment. Oxide is removed from the surface of the bar by means such as wire brushing, for example, with the oxide removing means and the nascent bar being enclosed in a non-oxidizing or reducing environment to improve the removal of existing oxide and to inhibit formation of new oxide on the bar while the bar travels from the oxide-removing means to the rolling mill to be hot-formed. Removal of oxide while the bar is in a non-oxidizing environment enhances the removal of oxide and lessens the unwanted removal of metal underlying the surface oxide.