Functional ceramic thermostatic furnace for submerged entry nozzle of continuous casting tundish

Abstract

The invention discloses a functional ceramic thermostatic furnace for a submerged entry nozzle of a continuous casting tundish. The functional ceramic thermostatic furnace comprises a furnace body, wherein a furnace chamber is formed in one side of the furnace body, an accommodating cavity is formed in the center of the furnace chamber, a guide rail opposite to the furnace chamber is arranged at the bottom of the furnace body, a kiln car furnace body is arranged on the guide rail, an actuating cylinder is arranged below the kiln car furnace body, and the kiln car furnace body can move along the guide rail under the action of the actuating cylinder to enter or leave the accommodating cavity of the furnace chamber; and a stand is arranged on the kiln car furnace body, and a silicon carbide girt strip of a nozzle to be backed is mounted on the stand. The ceramic thermostatic furnace can enable the submerged entry nozzle to quickly warm under the condition of being thermostatic, so that components uniformly generate an enamel layer, the baking time is shortened, the baking effect is increased, the service life of products can be effectively prolonged, and the rejection rate of rejectscaused by baking of the submerged entry nozzle can be notably reduced.

Description

technical field [0001] The invention relates to the technical field of ceramic constant temperature furnaces, in particular to a functional ceramic constant temperature furnace for continuous casting tundish immersion nozzle baking. Background technique [0002] At present, most domestic continuous casting platforms of steel mills use nozzles to bake off-line submerged nozzles with gas as the medium, and there are simple baking devices, coal oxygen lances, box furnaces, combustion chambers, etc. bake. [0003] The existing method of directly baking the submerged nozzle with gas as the medium through the nozzle method has the following problems: [0004] (1) In the process of heating with a gas flame, the temperature deviation between the upper part and the lower part of the submerged nozzle is large, and a glaze layer that gradually fails and cracks appears. After the glaze layer is damaged, it will lead to the oxidation of carbon in the aluminum carbonaceous material; and ...

AI Technical Summary

Problems solved by technology

[0004] (1) In the process of heating with a gas flame, the temperature deviation between the upper part and the lower part of the submerged nozzle is large, and a glaze layer that gradually fails and cracks appears. After the glaze layer is damaged, it will lead to the oxidation of carbon in the aluminum carbonaceous material; and the temperature The low glaze layer melts insufficiently and oxidizes;

[0005] (2) The impact force of the gas flame is very large, and long-term baking will damage the ceramic glaze layer on the inner and outer walls of the submerged nozzle

This will cause hidden defects of the product or become waste products, and the products with hidden defects will have longitudinal cracks or perforations during use, which will seriously affect the quality of molten steel protection casting;

[0006] (3) Converter gas is generally used as the gas source, and a few use natural gas. Operators can only judge the baking status of the submerged nozzle with the naked eye at close range, which has a large safety hazard; and the noise during the baking process is very loud, which affects continuous casting. Platform site environment management

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