Abstract:
A walking beam type reheating furnace which is provided with a furnace housing, stationary beams fixedly mounted in the furnace housing, first movable beams arranged on the charge side in the furnace housing, second movable beams arranged separately from the first movable beams on the discharge side in the furnace housing and a steel workpiece transfer device capable of transferring a steel workpiece which is placed in a zone where the first movable beams are located to a predetermined position in the vicinity of a separating portion of the first and second movable beams by passing the steel workpiece over the stationary beams and the first movable beams, wherein the first and second movable beams can be independently driven from each other.
Abstract:
A walking beam furnace comprises a hearth formed by fixed and walking beams disposed with their axes in the feed direction. Both the walking beams and the fixed beams are divided at positions spaced apart in the feed direction into sections, and each section of each beam is staggered relative to the adjacent section. As a result, the material to be annealed comes into contact with the cooled fixed beams at different positions at each of the conveying pauses and temperature balancing takes place at the points of contact.
Abstract:
A top-fired, lifting or walking, hearth-type furnace includes an upstream preheating zone and a downstream primary heating zone. Stock, such as billets or ingots, to be heated is passed sequentially through the preheating zone and primary heating zone. Each zone has therein support members for supporting the stock. The support members of the preheating zone are at a level higher than the support members of the primary heating zone, with a step therebetween, whereby hot flue gases in the preheating zone circulate upwardly around the support members therein and the stock supported thereby. A lowering and lifting apparatus is located at the step to transfer stock from the support members of the preheating zone to the support members of the primary heating zone.
Abstract:
A walking-beam furnace in the heating of metal bodies without bending in which at least a pair of walking beams straddle a stationary beam whose width is greater than that of the walking beams. The stationary beam is formed with a plurality of rectangular recesses opening at a support surface of the stationary beam upon which the metal bodies come to rest and communicate from below with a source of combustion gases so that the hot gas rises to contact the bottom of the metal bodies and the bottom of the metal bodies is subject to heating by radiation from the walls of the recess which converges downwardly to a duct supplying the hot gas. The width of the recess is greater than the widths of the portions of the fixed beam laterally flanking, while the length of the recesses is greater than its width.
Abstract:
Slabs can be uniformly heated by the use of a side-burner type heating furnace having flame length-variable type burners in the side walls, each burner consisting of an inner air flow nozzle, a fuel gas nozzle and an outer air flow nozzle arranged concentrically, and by adjusting the ratio of the flow rate of air passing through the inner air flow nozzle to the flow rate of air passing through the outer air flow nozzle depending upon the variation of the flow rate of fuel gas.
Abstract:
A furnace workpiece-support system has at least one horizontal workpiece-support tube through which a fluid coolant is circulated and at least one vertical support post or tube connected at its upper end at a joint to the horizontal tube and having a blind lower end. A tubular pressure-alteration body is provided in this joint and has an intake mouth directed upstream and an outlet mouth directed downstream and of different flow cross section from the intake mouth. A flow diversion element, either a flat plate or a pipe, extends downwardly from the pressure-alteration body into the vertical tube to conduct into this tube fluid coolant diverted at the pressure-alteration body.
Abstract:
A method for sealing and cooling the component slot members between the stationary hearth and movable beam or beams in walking beam furnaces by injecting air into the slot in such a manner that the air jets create a stagnation plane within the slot to maintain an equilibrium with the furnace pressure while impinging on the beam members and simultaneously cooling it.
Abstract:
A discharge mechanism is provided for a furnace having means to convey work therethrough wherein the work is removed from the furnace by contact with a supporting member having an inclined plane. An example of such a furnace is a walking beam furnace wherein the end portion of the stationary rails of the walking beam furnace is inclined downwardly and a vertically moving member is provided which contacts the work and causes it to move down the incline through the force of gravity.
Abstract:
A furnace construction for the heat treating of metal materials and including a conveying apparatus that provides for step-bystep movement of the metal materials through the heat treating chamber of the furnace construction, the drive for the conveying apparatus comprising a walking beam assembly. Sintering of various kinds of materials including metal compacts may be accomplished by the furnace construction and since treatment of the materials at relatively high temperatures is necessary during the heat treating cycle, a special sealing structure is provided for preventing contamination of the high temperature zone during sintering of the materials and the cooling thereof after the sintering cycle.