A method for making a converter flue and its protective device


Release time:

Oct 24,2018

Background technology:

The flue of the converter is an important part of the OG system of the converter.When the oxygen converter is blown and refined, it will produce a large amount of high-temperature flue gas containing CO and iron oxide soot (above 1450℃), and the smelting of the converter is carried out periodically. The heat load increases during the blowing and the temperature of the pipe wall increases; when the blowing is stopped, the heat load decreases and the temperature of the pipe wall decreases. , In a state of periodic thermal alternating stress, it can easily cause high-temperature oxidative corrosion, erosion, wear and fatigue damage to the pipe wall of the hood.Due to the leakage of the water-cooled wall of the hood pipe, the furnace needs to be stopped for welding, which not only affects the production order, but also because a large number of water leaks are poured into the furnace, which can easily cause an explosion.

Technical implementation elements: 

The embodiment of the utility model solves the technical problems of high temperature oxidation corrosion, erosion wear and fatigue damage caused by the hood pipe wall in the prior art due to periodic thermal alternating stress by providing a converter flue and its protective device, and realizes the technical effect of ensuring production order and safe production.

The embodiment of the utility model provides a converter flue, which comprises: a converter flue body and a protective device; wherein,

The converter flue body comprises: a skirt hood, a movable hood, an oblique hood, a vertical hood, a turning hood and a tail hood; the movable hood is arranged in the skirt hood; the first end of the oblique hood communicates with the movable hood, and the second end of the oblique hood communicates with the first end of the vertical hood; the oblique hood has an aerobic muzzle; the second end of the vertical hood communicates with the first end of the turning hood; the second end of the turning hood communicates with the tail hood;

The protective device comprises: a thermal insulation layer and a wear-resistant layer; the thermal insulation layer is arranged on the inner wall of the turning hood; the wear-resistant layer is arranged on the thermal insulation layer.

The embodiment of the utility model provides a protective device for the flue of the converter, which comprises: an insulation layer and a wear-resistant layer; the insulation layer is arranged on the inner wall of the flue of the converter; the wear-resistant layer is arranged on the insulation layer.