Drawable gas permeable brick

Abstract

The invention relates to a drawable gas permeable brick, comprising a gas permeable brick body (1) and an air supply pipe (2), wherein the bottom of the gas permeable brick body (1) is provided with a bottom plate (4), and an air chamber (5) is formed between the bottom surface of the gas permeable brick body (1) and the bottom plate (4); the upper end of the air supply pipe (2) penetrates through the bottom plate (4) and is communicated with the air chamber (5), and the air supply pipe (2) and the bottom plate (4) are hermetically connected; the upper end of the air supply pipe (2) penetrates through the air chamber (5) and is fixedly connected with the gas permeable brick body (1), and part of the pipe wall of the air supply pipe (2) positioned in the air chamber (5) is provided with anair hole (6) communicated with the air chamber (5); and the drawable gas permeable brick provided by the invention has simple structure and high drawing-out rate, and a welding seam is not easy to crack when being drawn.

Description

technical field [0001] The invention relates to a refractory element for ladle refining, in particular to a drawable air-permeable brick. Background technique [0002] Breathable brick is a functional refractory element, mainly used in the refining process of various metals, alloys, etc., blowing air into the molten liquid through the breathable brick to stir the liquid, making the high-temperature molten liquid flow, and promoting the inclusions in it to float. So as to achieve uniform melting liquid composition and temperature, and the purpose of removing inclusions. There are two types of breathable bricks: integral type and split type. Since the split breathable brick can be replaced in a hot state, it has the characteristics of being able to synchronize with the life of the metallurgical container. Compared with the integral breathable brick, the cost of the split breathable brick is also lower. Low, therefore, most of the steel production uses split air bricks. [00...

AI Technical Summary

Problems solved by technology

Although the breathable brick with the above structure can improve the success rate of pulling out to a certain extent, a series of reinforcement operations must be performed on the outer surface of the refractory material of the breathable brick core body, making the structure of the breathable brick core body very complicated. The production process is very cumbersome, and consumes materials and high cost. More importantly, the above-mentioned method of enhancing the connection force still uses welding, which still has the possibility of weld cracking, and cannot fully guarantee that the ventilating brick core can be successfully pulled out

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