Air supply brick and preparation method thereof

Abstract

The invention discloses an air supply brick and a preparation method thereof. The air supply brick comprises an air supply brick body and an air chamber, wherein the first end of a stainless steel metal breather pipe in the air supply brick body extends out to the outer side of the air supply brick body and into a bottom plate hole in an air chamber bottom plate of the air chamber, and the pipe wall of the stainless steel metal breather pipe and the hole wall of the bottom plate hole are connected in a welded mode; a stainless steel bottom plate is installed between the air chamber bottom plate and an inner cavity of the air chamber, and a drilled hole is formed in the stainless steel bottom plate; the first end of the stainless steel metal breather pipe penetrates through the bottom platehole and the drilled hole sequentially after extending out of the air supply body, and the pipe wall of the stainless steel metal breather pipe and the hole wall of the drilled hole are connected ina welded mode; and the air chamber bottom plate and the stainless steel bottom plate are connected in a welded mode. By adopting the air supply brick of the structure for welding, micro-pores and micro-cracks generated in an original welding mode are avoided. According to air-tightness detection, the percent of pass reaches 99% or above, the welding quality of the air supply brick is effectively guaranteed, and the product percent of pass is increased.

Description

technical field [0001] The invention relates to the technical field of refractory materials for iron and steel smelting. Specifically, it is an air supply brick and a preparation method thereof. Background technique [0002] The converter gas supply brick is also called the converter breathable brick and the gas supply element (hereinafter referred to as the gas supply brick). It is installed at the bottom of the converter, and the gas (including N 2 、Ar 2 , CO 2 ), a composite functional element that provides bottom blowing stirring power for molten steel. [0003] Top-bottom compound blowing is an important direction for the development of converter steelmaking technology, and the bottom blowing gas supply brick is the core of realizing converter compound blowing technology. The use of bottom blowing technology can shorten the smelting time, uniform the temperature and composition of molten steel, reduce The purpose of removing inclusions in molten steel, increasing me...

AI Technical Summary

Problems solved by technology

Deformation and pollution of the bottom plate occur during the forming process. The bottom plate of the air supply chamber is directly welded to the stainless steel pipe. Micropores and micro cracks are generated after welding, which leads to the failure of the air tightness test and the failure to meet the test standard, thus scrapping

Images