摘要:
A panel cooled by the circulation of water and adapted to constitute all or part of a wall of an electric arc furnace. The panel consists, at the inside of the furnace, of a thick and corrugated wall to which is welded, at the outside of the furnace, a second thinner wall, the two walls defining passages adapted for the circulation of the water. The invention is used in electric arc furnaces for steel mills.
摘要:
A box-shaped shallow, water-cooled element of steel plate for the construction of a wall portion of a melting furnace above the melt in the furnace, has a front wall adapted to face the interior of said furnace. This front wall is provided with a plurality of recesses of equal cross-section equally spaced from each other in the form of elongated grooves or bores to facilitate adhesion of a layer of refractory material to be applied thereto, wherein the recesses are machined in the surface of the front wall adapted to be directed to the interior of the furnace in such a manner that the area of recesses at this surface is smaller than the area of the remaining non-machined surface to thus enhance heat conduction from the interior of the furnace to the cooling water passing through the wall element and to prevent damage of the front wall when the protective layer is missing completely or in part.
摘要:
Furnace cooling apparatus is provided including iron staves on the inside of a steel shell, outer portions of the staves being hollow to define reservoirs filled with water. Heat pipes are mounted in bores in inner solid portions of each stave and extend from inner ends in the reservoir to outer ends spaced a short distance from the inner surface of the stave. The inner surface of a stave has alternating surfaces and recesses and heat pipes aligned therewith have corresponding long and short lengths.
摘要:
A coolant fluid chamber is affixed to the shell of an electric arc furnace to cool and decrease erosion of the refractory lining of the furnace caused by localized heating and arc flaring. The wall of the cooling chamber adjacent the furnace shell comprises a diaphragm or sheet of flexible material which is subject to deformation when the space between it and the furnace shell is evacuated and the sheet is pressed. The interface between the diaphragm and shell is coated with a flowable or deformable heat conductive material prior to attachment of the chamber to the furnace so that this material will flow into any void spaces in the interface to thereby enhance thermal conduction.
摘要:
A method of suppressing hot spots in an electric arc furnace particularly an electric arc furnace for use in steel making and an apparatus pertaining thereto, in which one or more water cooled boxes are provided in the furnace wall. The temperature of the inner wall of the box or of the cooling water is sensed. The power supply to the electrode or electrodes is adjusted in response to the sensed temperature.
摘要:
A stave cooler used for cooling a furnace wall of a metallurgical furnace such as a blast furnace, having a structure in which cooling pipes to cool a metal base are cast on the side opposite the furnace interior side of the metal base and a heat resistant steel plate having openings or a lamination of heat resistant steel plates having openings is cast, in a prescribed thickness, in the furnace interior side surface of the metal base. It is acceptable to form the lamination suitably into a rectangular parallelepiped and cast it, in a plurality, in the furnace interior side of the metal base. The wear rate of the furnace interior side surface of the stave cooler is small, and its structure prevents the heat resistant steel plate(s) from falling out by thermal expansion of the stave cooler proper or wearing locally.
摘要:
A duct for a cooling medium is formed by a channel (2) closed by a rear and end cover plates (3, 4) embedded in a metal of a plate (1) so that the rear cover plate (3) is free from said metal. On the rear cover plate (3) are provided branch pipes (5) for feeding the cooling medium into the duct and discharging the same therefrom.
摘要:
An electric arc furnace for steel making includes a shell portion and a separate furnace bed portion made, the shell portion having a plurality of water-cooling boxes, instead of refractory bricks, along its inner circumferential surface, and the furnace bed portion being made slightly larger in outside diameter than the shell portion, the two portions being separably combined into a furnace.
摘要:
A cooling plate for circulating fluid for cooling the walls of shaft furnaces and particularly blast furnaces, and being placed between the refractory material to be cooled and the facing of the furnace to be protected and comprising a flat thin-walled panel made of cast steel and forming a tightly sealed enclosure through which passes an independent stream of cooling fluid, this enclosure being divided up into tubular passages with the aid of partitions which delimit a single circulatory path for the cooling medium which circulates in a vertical upward sinusoidal movement, that face of the plate which faces the interior of the blast furnace to be protected being lined with a high-strength refractory material.
摘要:
A cold charge of steel scrap is melt cut and melted in an arc furnace provided with special oxygen-fuel burners by which rapid melting is promoted, the interior of the furnace being maintained under negative pressure by a fume evacuation and filtration means thereby to draw in secondary air from the outside atmosphere and, moreover, to increase the burner combustion efficiency. The arc furnace is provided with water cooling devices including a water-cooled ring, carbonaceous bricks, high-alumina ramming masses, and burner tiles in parts of the furnace wall and roof, particularly at wall parts where the burners are mounted, the wall above the slag line, and a roof part where an exhaust gas outlet is formed.