Method for manufacturing large-size refractory bricks

Abstract

The invention belongs to the field of refractory materials, and provides a method for manufacturing large-size refractory bricks.The method for manufacturing the refractory bricks comprises the steps that spherical pelleting materials are adopted as a matrix, and fine particles with the grain size of 0.1 mm to 1 mm are adopted as aggregate; the spherical pelleting materials, water and a binding agent are manufactured into slurry in a stirrer, and the slurry is manufactured into spherical matrix pelleting materials with the water content of 0.2% to 0.5% through a centrifugal spraying pelletizer; the spherical matrix pelleting materials and the fine particles are subjected to dry blending in mixing equipment, and an even mixture is obtained; the mixture is directly contained in a mold and subjected to pressure forming in an isostatic pressing machine at the pressure of 90 MPa to 180 MPa, and blanks with enough strength are obtained; the formed blanks are dried for 24 h at the temperature of 120 DEG C, then heat preservation is carried out for 6 h to 10 h at the temperature of 1,500 DEG C to 1,650 DEG C, and the large-size refractory bricks can be obtained.The manufactured large-size refractory bricks have the advantages of being even in structure, high in density and strength and good in corrosion resistance.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a method for preparing large-size refractory bricks. Background technique [0002] Large-sized refractory bricks can be used in glass kilns and other places where the size of refractory bricks is required to be high due to their uniform structure, good integrity, and fewer brick joints during assembly. [0003] At present, the commonly used refractory brick forming methods are organic pressure forming and pouring forming. The machine pressing forming method is unidirectional pressure, and the pressure gradually decreases with the thickness of the brick during the transmission process. Therefore, this method cannot form large-sized bricks; pouring molding This method can form larger-sized adobes, but on the one hand, there are large air bubbles in the prepared adobes, which is not conducive to the uniformity of the structure; High, long maintenance and drying time ...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used refractory brick forming methods are organic pressure forming and pouring forming. The machine pressing forming method is unidirectional pressure, and the pressure gradually decreases with the thickness of the brick during the transmission process. Therefore, this method cannot form large-sized bricks; pouring molding This method can form larger-sized adobes, but on the one hand, there are large air bubbles in the prepared adobes, which is not conducive to the uniformity of the structure; High, long maintenance and drying time for large-sized blanks, long production cycle and low efficiency