Atmosphere isolation device of horizontal annealing furnace

Abstract

The invention discloses an atmosphere isolation device of a horizontal annealing furnace. The atmosphere isolation device comprises a furnace shell, a first baffle, a second baffle, an upper baffle, an upper crossbeam, an upper box body, an upper box cover and refractory brickworks, wherein the refractory brickworks are laid at the bottom of the furnace shell; the refractory brickworks are divided into three layers; the first baffle and the second baffle are symmetrically welded to the furnace shell; the upper baffle is composed of seamless pipes, three-way pipes, an upper baffle framework, a lifting lug, a fixed steel pipe and round steel; the upper box body is fixed on the furnace shell through connecting bolts; the upper box cover is fixed to the upper box body through connecting bolts; the upper box cover and the upper crossbeam are sealed by corrugated pipes; and finally a sealed space is formed between the upper crossbeam and the upper baffle. As the upper baffle, the first baffle, the second baffle and the refractory around the furnace shell are adopted to form a sealed structure, the atmosphere isolation device of the horizontal annealing furnace, disclosed by the invention, has the advantage of functioning on isolating atmospheres in front and back furnaces.

Description

technical field

[0001] The invention relates to heat treatment equipment in the metallurgical industry, in particular to an atmosphere isolation device for a horizontal strip steel continuous annealing furnace. Background technique

[0002] According to the annealing process requirements for the production of special steel types, different furnace sections in the unit need to adopt different atmosphere specifications, and the atmosphere in the furnace is of great significance to the surface quality of the strip steel. For the traditional annealing furnace, an isolation device is set between the non-oxidizing heating section and the radiant tube heating section, which can not only block the heat radiation from the non-oxidizing heating section to the radiant tube heating section, but also prevent the furnace gas from the non-oxidizing heating section when necessary. Backflow into the radiant tube heating section to avoid contamination of the furnace. And when the unit runs a...

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