Thermal treatment furnace fire door without water cooling

Abstract

The invention discloses a thermal treatment furnace fire door without water cooling, and relates to the technical field of thermal treatment equipment. The thermal treatment furnace fire door withoutwater cooling comprises a fire door frame. The fire door frame comprises a fire door base plate. A fire door casting is arranged on the inward side of the fire door base plate. The fire door casting comprises a plurality of first castings and four second castings, wherein the section of each first casting is rectangular, and the section of each second casting is in the shape of an L. the first castings and the second castings are connected in sequence to define a rectangle, the second castings are located in the four corners of the rectangle, a cavity is formed in the middle of the rectangle,and the cavity is filled with refractory fibers. A plurality of pieces of heat-resisting cast iron are further arranged on the inward side of the fire door base plate and are evenly arranged outside the fire door casting, and the side, facing the fire door castings, of each piece of heat-resisting cast iron is attached to the corresponding fire door casting. According to the thermal treatment furnace fire door without water cooling, the fire door is cooled without adopting a water cooling manner, the phenomenon that a fire door is prone to being corroded because of water cooling temperature lowering is completely avoided, and the service life of the fire door is guaranteed.

Description

technical field [0001] The invention relates to the technical field of heat treatment equipment, in particular to a waterless cooling heat treatment furnace door. Background technique [0002] Heat treatment refers to a metal thermal processing process in which the chemical composition and structure of the surface or interior of the material are changed by means of heating, heat preservation and cooling in the solid state to obtain the required properties. The commonly used heat treatment equipment is the heat treatment furnace. [0003] Since the furnace door of the non-oxidizing roller hearth heat treatment furnace is at a high temperature of 1000°C for a long time, it needs to cool the furnace door. At present, the furnace door is generally cooled by circulating water, but the water-cooled furnace door is easy to Corrosion, easy scaling and damage inside, high replacement frequency, greatly increase the maintenance cost of the equipment; at the same time, once the furnac...

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Problems solved by technology

[0003] Since the furnace door of the non-oxidizing roller hearth heat treatment furnace is at a high temperature of 1000°C for a long time, the furnace door needs to be cooled. At present, the furnace door is generally cooled by circulating water, but the water-cooled furnace door is easy to Corrosion, easy scaling and damage inside, high replacement frequency, greatly increase the maintenance cost of the equipment; at the same time, once the furnace door leaks, it will affect the furnace temperature in the heating furnace, the control of residual oxygen in the furnace, and the furnace roller The service life of the steel structure in the furnace and the quality control of the steel plate in the furnace will have different degrees of influence

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