High-stress-strain low-creepage high-thermal-shock-resistance refractory brick and manufacturing method thereof

Abstract

The invention discloses a manufacturing method of a refractory brick. According to the manufacturing method, low-and-medium-grade andalusite (the contents of Al2O3 are 53%, 55% and 57%) are used as main raw materials, large and intermediate andalusite particles are replaced with large mullite particles and intermediate cordierite particles, and corundum, alpha-Al2O3 micropowder and SiO2 micropowder and combining clay and waste paper pulp are added. The preparation method comprises the following steps of: mixing the ingredients in a wet pan mill evenly and then discharging out of the mill; forming by a frictional brick press; drying the formed green blanks in a dryer; calcining the dried blanks in a calcining kiln, wherein the highest calcining temperature ranges from 1370DEG C to 1400DEG C. The refractory brick obtained by adopting the method can effectively solve the problems of the conventional refractory brick, such as high manufacturing cost, low load softness, large creepage, poor anti-seismic property and short service life; the appearance defects of the refractory brick are fewer, and the refractory brick can be widely applied in a ceramic burner of an ironmaking blast-furnace hot blast stove.

Description

technical field [0001] The invention relates to a high-load soft, low-creep, high thermal-shock-resistant refractory brick used in a ceramic burner of an ironmaking blast furnace hot blast stove and a manufacturing method thereof. Background technique [0002] The progress and rapid development of science and technology require and make the life of the hot blast stove longer and longer. What does not match this demand is that the refractory bricks used in the ceramic burner in the hot blast stove are used due to harsh conditions, long-term high-temperature load, large temperature changes, and frequency. Therefore, it is necessary to develop a refractory brick with high load softness, low creep and high thermal shock resistance, so as to improve the overall life of the hot blast stove. The refractory brick described in patent CN200510107318.0 uses large particles of mullite, cordierite and andalusite as base materials, and the prepared refractory brick solves the problem of p...

AI Technical Summary

Problems solved by technology

[0002] The progress and rapid development of science and technology require and make the life of the hot blast stove longer and longer. What does not match this demand is that the refractory bricks used in the ceramic burner in the hot blast stove are used due to harsh conditions, long-term high-temperature load, large temperature changes, and frequency. Therefore, it is necessary to develop a refractory brick with high load softness, low creep and high thermal shock resistance, so as to improve the overall life of the hot blast stove

The refractory brick described in patent CN200510107318.0 uses large particles of mullite, cordierite and andalusite as base materials, and the prepared refractory brick solves the problem of poor seismic performance, but because the particles are mainly mullite and cordierite The content is higher, making the load soft and low, and the creep is large

Patent CN200510107316.1 uses high-aluminum material as the main raw material. Although the cost is reduced, due to the high content of high-alumina material, the refractory brick has low load softness, poor creep, and poor thermal shock resistance of 1300°C water cooling.

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