Spheroidizing annealing furnace and annealing process for steel wire

Abstract

The invention discloses a spheroidizing annealing furnace for a steel wire. The spheroidizing annealing furnace comprises a furnace body, an inner cylinder and a furnace cover, wherein a coal gas heating point is arranged on the furnace body; a fan is arranged in the inner cylinder; a motor for driving the fan is arranged below the furnace body; a shaft barrel at the bottom of the inner cylinder extends out of the furnace body; and a rotating shaft for connecting the motor with the fan penetrates through the shaft barrel. In the production process for a long time, heat insulating cotton and refractory bricks are aged; waste gas in a combustion chamber is exhausted out of the furnace body from the outer wall of the shaft barrel without entering the inner cylinder; and the steel wire is positioned in the annealing furnace and methanol gas is introduced into the annealing furnace at high temperature, so that the decarburization of the steel wire is prevented and the annealing quality of the steel wire is improved.

Description

technical field [0001] The invention relates to the technical field of steel wire spheroidizing annealing, in particular to a steel wire spheroidizing annealing furnace and an annealing process thereof. Background technique [0002] The spheroidizing annealing furnace is the main equipment for the production and processing of low-carbon steel, medium-carbon steel, low-alloy steel and other wire rods. It is used to refine the structure of steel wire, eliminate processing stress, and improve processing performance. [0003] The existing spheroidizing annealing furnace includes a furnace body, an inner bucket, a fan and a fan motor arranged below the furnace body. The body is sealed and insulated by insulation cotton and refractory bricks. Insulation cotton and refractory bricks that have been exposed to high temperatures for a long time will age and the sealing effect will deteriorate. The exhaust gas in the combustion heating chamber will enter the inner barrel through the ...

AI Technical Summary

Problems solved by technology

In this way, the exhaust gas in the combustion heating chamber will enter the inner barrel through the aging insulation cotton and refractory bricks, which will affect the annealing quality of the steel wire in the inner barrel

[0004] For example, the gas-fired spheroidizing annealing furnace disclosed in Chinese patent ZL 200620108624.6, the annealing furnace disclosed in Chinese patent ZL 201120189538.3, and the spheroidizing annealing furnace disclosed in Chinese patent ZL 201120240126.8, during the long-term production process, with the aging of insulation cotton and refractory bricks, both The exhaust gas in the combustion heating chamber enters the inner barrel through the aging insulation cotton and refractory bricks, which affects the annealing quality of the steel wire in the inner barrel

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