Method for heating and supporting aluminum band

Abstract

The invention relates to a method for heating and supporting an aluminum band, which is realized by an aluminum band heating and supporting device mainly composed of a furnace body, heating devices, an air cushion group, an air collecting chamber and a circulating fan, wherein the air cushion group, the air collecting chamber and the circulating fan are situated in the hearth, and the heating devices are passed through the side wall of the furnace body to enter the hearth and are situated in the air collecting chamber; with the rotation of the circulating fan, a positive pressure difference is formed between the whole hearth and a spray box spout of the air cushion group, the air in the hearth enters the spray box from a spray box inlet and is ejected from the spray box spout, the ejectedair returns after meeting the aluminum band and enters the air collecting chamber through an overflow hole, and the air is heated by the heating devices on the two sides in the air collecting chamberand is driven by the circulating fan to enter the hearth to guarantee the hearth as a stable static pressure chamber so as to guarantee the heated air to be continuously ejected to the aluminum band.The device and method of the invention have the advantages of heating uniformity, high heating efficiency and good operation stability of the aluminum band.

Description

technical field [0001] The invention relates to the field of heat treatment of aluminum strips, in particular to heating and supporting of aluminum strips in a heat treatment line of an aluminum strip air cushion furnace. Background technique [0002] It is known (US5639418) to provide an aluminum strip air cushion type heat treatment furnace and a heating conveying device. The heat treatment furnace adopts a section design, and each section is provided with a circulating fan, a heating device, a supporting air cushion group, a depressing air cushion group, and an upper heating nozzle. Tube and lower heating nozzle. Wherein, the supporting air cushion and the depressing air cushion are arranged oppositely along the aluminum strip for supporting the aluminum strip; the upper heating nozzle and the lower heating nozzle are arranged oppositely along the aluminum strip for heating the upper and lower surfaces of the aluminum strip. The working principle of the aluminum strip ai...

AI Technical Summary

Problems solved by technology

[0009] (1) Since the heating of the aluminum strip is realized by the heating nozzle, and the heating nozzle and the air cushion are arranged alternately, the proportion of the effective area for heating is relatively small, which directly leads to the low heating efficiency of the entire heat treatment furnace

[0010] (2) There is a gas mixing chamber and a relatively independent positive pressure channel in the furnace, which makes the structure of the furnace complex and the width of the furnace is relatively large;

[0011] (3) The depressing air cushion and the supporting air cushion are relatively arranged, and the running stability of the aluminum strip is poor, which is prone to vibration and deviation problems

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