Firebrick for hot blast stove and preparation method thereof

Abstract

The invention discloses a firebrick for a hot blast stove and a preparation method thereof. The firebrick is prepared by the following raw materials by weight: 23-34 parts of river sand, 50-60 parts of black cement, 25-35 parts of diabase, 28-41 parts of power plant slag, 19-33 parts of calcium titanate nanofiber, 13-19 parts of polymine, 25-40 parts of kieselguhr, 20-30 parts of brine magnesia, 16-29 parts of marble waste residue, 8-14 parts of hydroxypropyl methyl cellulose, 16-28 parts of silica sand tailings, 5-10 parts of polymaleic anhydride, and 15-20 parts of fused zirconia. The firebrick prepared by the diabase, the calcium titanate nanofiber, the brine magnesia, the marble waste residue, the fused zirconia and so on has the characteristics of higher refractoriness under load and mechanical strength, good high temperature structure performance, good thermal shock stability performance, strong anti-corrosion performance, stripping resistance, acid-base resistance, good creep resistance and so on, and is capable of satisfying the performance requirement of the hot blast stove completely.

Description

technical field [0001] The invention relates to a refractory brick for a hot blast stove and a preparation method thereof, belonging to the field of refractory materials. Background technique [0002] Refractory bricks are refractory materials with a certain shape and size made of refractory clay or other refractory raw materials, and can withstand high temperatures of 1580°C-1770°C. According to the preparation process, it can be divided into fired bricks, unfired bricks, fused bricks (fused cast bricks), refractory and heat-insulating bricks; according to the shape and size, it can be divided into standard bricks, ordinary bricks, special bricks, etc. Refractory bricks can be used as high-temperature building materials and structural materials for construction kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical actions at high temperatures. [0003] The hot blast stove is one of the main facilities in the blast furna...

AI Technical Summary

Problems solved by technology

Although the refractory bricks made by using the above raw materials and processes have solved the defects of the existing clay heat-insulating refractory bricks, such as low load deformation temperature, easy shrinkage at high temperature, high thermal conductivity, and poor heat preservation effect, but its refractoriness, resistance Compared with foreign refractory bricks, there is still a big gap in creep performance, mechanical strength and thermal shock resistance, which cannot meet the needs of the export market