Magnesia-alumina spinel structure heat insulation integral composite brick and preparation method thereof

Abstract

The invention discloses a magnesia-alumina spinel structure heat insulation integral composite brick and a preparation method thereof. The heat insulation integral composite brick comprises a heavy work layer and a light heat insulation layer, wherein the heavy work layer is made of compact magnesia-alumina spinel, the light heat insulation layer is made of light aggregate of alumina hollow ballsor magnesia-alumina hollow balls or corundum hollow balls or a mixture of the alumina hollow balls, the magnesia-alumina hollow balls and the corundum hollow balls, the heat insulation integral composite brick is formed through vibration compression or mechanical compression, and the length size proportion of the heavy work layer and the light heat insulation layer is 1 to 5 / 2 to 1. The inventionovercomes the defect of high heat conduction coefficient of magnesia-alumina spinel bricks used for a rotary kiln, and provides the magnesia-alumina spinel structure heat insulation integral composite brick with the advantages of good wear resistance performance, high refractoriness, high structural intensity and excellent heat insulation and thermal isolation performance.

Description

technical field

[0001] The invention relates to a refractory composite brick and a preparation method, in particular to a composite brick with a magnesia-aluminum spinel structure and heat insulation integration and a preparation method. Background technique

[0002] With the continuous emergence of new technologies for cement production, the main equipment of cement production is developing in the direction of large-scale, increasing production, improving quality, saving energy, reducing consumption, and reducing costs have become the key to increasing efficiency in production management. Most of the existing refractory bricks and heat insulation bricks have a single structure, and bricks with various properties need to be used together. If they are used on relatively fixed equipment, such as tunnel kilns and downdraft kilns, they can meet the requirements when used together. ; But on some relatively moving equipment, such as a rotary kiln, it is difficult to meet the requi...

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