Preparation method of anorthite light refractory brick

Abstract

The invention provides a preparation method of an anorthite light refractory brick. The preparation method adopts a batch mixing mode to mix materials, and comprises the following specific steps: step 1, stirring and mixing silicon-containing aluminum minerals, gypsum powder, sawdust and / or wood powder to obtain a mixture I; step 2, adding a composite additional binding agent into water, and stirring to obtain a mixture II; step 3, adding the mixture I prepared in the step 1 into the mixture II prepared in the step 2, and mixing to obtain pug; step 4, pouring the pug prepared in the step 3 into a forming mold, directly demolding to obtain a wet anorthite brick blank after moisture curing, and directly stacking the wet anorthite brick blank on a kiln car in a wet manner; and step 5, carrying out firing molding. The poured wet anorthite brick blanks are quickly cured, wet stacking can be directly carried out after demolding, drying is not needed, and the strength of the demolded wet blanks can meet the technological requirement for stacking three or more layers of wet anorthite bricks.

Description

technical field [0001] The invention relates to the technical field of refractory material preparation, in particular to a method for preparing an anorthite lightweight refractory brick. Anorthite lightweight heat-insulating bricks have low bulk density, low thermal conductivity, good thermal shock resistance and strong anti-reducing atmosphere, and the service temperature is 1100-1300°C. Anorthite lightweight heat-insulating refractory bricks are widely used , used as thermal insulation lining for hot blast stove, soaking furnace, heating furnace, etc. in the steel industry, and thermal insulation lining for various catalytic cracking furnaces in the petroleum industry. Background technique [0002] Anorthite refractory bricks have the characteristics of low density, small thermal expansion coefficient, and low thermal conductivity. They can replace clay bricks, silicon, and high-alumina refractory materials with operating temperatures of 1000-1300 ° C, and realize energy s...

AI Technical Summary

Problems solved by technology

[0003] The existing anorthite brick raw materials cannot harden quickly after pouring, and the mechanical and physical properties of the wet anorthite brick after hardening are very low, which cannot meet the needs of wet palletizing of anorthite bricks. Before wet palletizing, it must be In the drying process, the strength of the green body is very low before drying, which will bring inevitable loss to subsequent processes such as drying, stacking and kiln loading, which will easily reduce the yield of finished products, inevitably increase labor and increase the cost of the process. process, increase operating time, thereby reducing production efficiency and increasing production costs

[0004] The variety of raw materials in the existing technology makes it difficult to control the inevitable impurities of each raw material. Due to the existence of impurities, the mechanical and physical and chemical properties of anorthite bricks are unstable, which cannot meet the actual needs of the industry.

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