Flat flame nozzle type differential temperature heat treatment furnace

Abstract

The invention relates to a flat flame nozzle type differential temperature heat treatment furnace, belongs to the technical field of differential temperature heat treatment, and solves the problem that it is difficult to ensure high quality heating of continuous rolling mill bearing rollers with roller bodies in different specifications. The flat flame nozzle type differential temperature heat treatment furnace comprises two half furnace structures in the same structural size; each half furnace structure comprises a furnace body, a trolley, a combustion system and a smoke exhaust system; each furnace body is arranged on the corresponding trolley; the furnace bodies of the two half furnace structures can be combined into a cylindrical furnace wall with the end faces being a ring; the combustion systems penetrate into the furnace bodies, and flat flame nozzles are arranged on the inner surfaces of the furnace bodies; the axes of the flat flame nozzles are perpendicular to the inner surfaces of the furnace bodies; smoking ports of the smoke exhaust systems are arranged on the furnace wall of the furnace bodies; and a heat exchange structure is arranged between an exhaust pipe and an air intake pipe. By means of the flat flame nozzle type differential temperature heat treatment furnace, stable control over the roller body axial temperature field homogeneity during heating of the bearing rollers is achieved, the roller body hardness uniformity index of the bearing rollers reaches the higher level, and the product quality yield is improved.

Description

technical field [0001] The invention relates to the technical field of differential temperature heat treatment, in particular to a flat flame burner type differential temperature heat treatment furnace. Background technique [0002] At present, the main specifications of the well-known back-up rolls for cold and hot continuous rolling mills are all in the diameter of the roll body Within the range, the length of the roll body ranges from 1200 to 2300mm, and the weight is about 15 to 55 tons. In order to better ensure the performance of the roll body, the high-temperature heating in the known final heat treatment process is carried out in a differential temperature furnace. The furnace types mainly include vertical and horizontal types, and the horizontal differential temperature furnace is used more. , the basic features of the furnace body are composed of two semi-cylindrical structures that are left-right symmetrical and horizontal. There are three types of front and rea...

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a flat-flame burner type differential temperature heat treatment furnace to solve the problem that it is difficult to ensure high-quality heating for the back-up rolls of continuous rolling mills with different roll body lengths.

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