Abstract:
Provided are a fixed-type electric furnace enabling continuous operation which allows melting without the interruption of power supply and tapping in a fixed state, and a fixed-type electric furnace and a molten steel production method using same. The fixed-type electric furnace comprises: a preheating furnace which is disposed on the side of a melting furnace and preheats an iron source (scrap) using exhaust gas from the melting furnace; a supply means for supplying the iron source, which has been preheated in the preheating furnace, to the melting furnace; the melting furnace comprising electrodes for melting the preheated iron source; and a fixed-type discharge means for discharging molten steel which has been melted in the melting furnace, wherein the preheating furnace is integrally connected to the melting furnace.
Abstract:
An example oven for heating fibers includes a chamber having upper and lower portions and a supply structure between first and second ends of the chamber, wherein the supply structure is in communication with a first heating system and is configured to direct first heated gas from the first heating system into the upper portion of the chamber to heat fibers in the upper portion at a first temperature, and wherein the supply structure is in communication with a second heating system and is configured to direct second heated gas from the second heating system into the lower portion of the chamber to heat fibers in the lower portion at a second temperature different than the first temperature such that the upper and lower portions of the chamber maintain the different temperatures without a physical barrier between the upper and lower portion.
Abstract:
[Problem] To provide: a molten metal plating furnace that can increase plating quality and work efficiency; a system for producing and method for producing a metal plated product; and a metal plated steel tube obtained by means of the method for producing. [Solution] The system for producing has at least one plating implementation unit that performs molten metal plating of a plating processing subject, and at least one plating implementation unit has a plating bath and a heating device for heating the plating bath, wherein in the heating device, an array of fuel filling openings and an array of air filling openings are formed that are facing in a manner so as to discharge air and fuel to a combustion region in common along a combustion chamber, the effective opening cross-sectional size of at least the majority of the openings of at least one of the opening arrays can be adjusted by means of an adjustment mechanism for adjusting the extent of a medium filling opening array, and when the size of both opening arrays can be adjusted, individual adjustment of the arrays is possible.
Abstract:
An electric arc furnace (2) and to a method for operating an electric arc furnace having at least one electrode (4a, 4b, 4c) for generating an electric arc (6a, 6b, 6c), in which the desired value of the current (I) guided to the electrode (4a, 4b, 4c) oscillates about a predetermined base value (I0).
Abstract:
This invention relates to a gas blowing nozzle for blowing a gas to a molten metal in a furnace, the gas blowing nozzle including: a first nozzle section including a plurality of first narrow metal pipes having open furnace-side tips exposed to an inside of the furnace and being in the state of capable of blowing a gas to the molten metal in the furnace, a first surge tank communicated with the first narrow metal pipes, and a first refractory protecting the first narrow metal pipes and the first surge tank; and a second nozzle section including a plurality of second narrow metal pipes, a second surge tank communicated with the second narrow metal pipes, and a second refractory protecting the second narrow metal pipes and the second surge tank.
Abstract:
Equipment for the treatment of loads or residues of non-ferrous metals and their alloys include a rotary furnace having a vessel with a sealed door. An electrode is introduced into the rotary furnace and is used to establish a free burning convective electric arc with the load introduced into the furnace or with the furnaces bottom wall. The equipment is assembled over a hinged base which allows elevating or lowering its rotation axis with respect to a horizontal plane.
Abstract:
A method for smelting steel scrap in a furnace is described, a working gas being blown into the furnace via a flow channel in order to supply melting energy and being guided through at least one electrodeless plasma torch, the plasma being produced by at least one inductive heating coil that coaxially encloses the flow channel and forms a heating zone. Further a melting furnace with at least one heating device that extends through a wall of the furnace is described, for supplying melting energy. The heating device has a tubular body which encloses a flow channel. A longitudinal section of the tubular body is configured as an electrodeless plasma torch, said torch having an inductive heating coil that coaxially encloses the flow channel and forms a heating zone.
Abstract:
The invention relates to a device for heating molten metal by the use of a heater that can be immersed into the molten metal. This immersion heater includes an outer cover formed of one or more materials resistant to the molten metal in which the immersion heater is to be used, and a heating element inside of the outer cover, where the heating element is protected from contacting the molten metal.
Abstract:
Metallurgical processing installation comprising a metallurgical vessel lined internally with water cooled panels. A vessel access tower (61) fits around vessel (11) and supports a coolant flow system (62) to provide for flow of cooling water to and from the cooling panels within the vessel through water inlet and outlet connections (42,43) distributed around the exterior of the vessel. Coolant flow system (62) includes large diameter water supply and return pipes (66,67) mounted on an upper part of the tower (61) to extend around the upper end of vessel (11), a first series of vertical dropper pipes (68) of relatively small diameter connected to the main water supply pipe 66 and extending downwardly to connections with the water inlet connectors for respecting cooling panels of the vessel and a second series of smaller diameter vertical pipes (69) connected at their upper ends to the main return pipe (67) and at their lower ends to undivided outlet connectors for the cooling panels in the vessel.