High-alumina structure heat-insulation integrated composite brick and preparation method

Abstract

The invention discloses a high-alumina structure heat-insulation integrated composite brick and a preparation method. The high-alumina structure heat-insulation integrated composite brick comprises a heavy working layer adopting compact bauxite chamotte as main raw material and a high-strength light heat-insulation layer adopting alumina hollow ball, aluminum-magnesium hollow ball, corundum hollow ball, hollow micro-sphere, light ceramic particle or the mixture of the above materials as a skeleton material, and is formed by compounding the heavy working layer and the light heat-insulation layer in a vibration pressurizing way or a mechanical formation way, and the length ratio of the heavy working layer and the light heat-insulation layer is 1 to 5: 2 to 1. The high-alumina structure heat-insulation integrated composite brick overcomes the weakness that the high-alumina brick for rotary kiln has large heat conduction coefficient or overcomes the weakness that the heat-insulation layerof the present high-alumina composite brick has low strength and is easy to break. The invention provides the structure heat-insulation integrated composite brick with good abrasion resistance, high refractoriness, good structural strength and good heat-preserving and heat-insulation performance.

Description

technical field [0001] The invention relates to a refractory composite brick and a preparation method thereof, in particular to a high-aluminum structural heat insulation integrated composite brick and a preparation method thereof. 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. The rotary kiln is mainly composed of kiln shell, refractory bricks and transmission equipment. During the production process, the heat in the material is transferred to the kiln skin, refractory bricks and kiln shell through radiation and conduction, and the heat transferred to the kiln shell is then dissipated into the atmosphere through radiation and convection. Since the thermal conductivit...

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Problems solved by technology

The temperature of the outer wall of the cylinder is high. On the one hand, it increases the heat dissipation of the kiln cylinder, thereby increasing the heat consumption of the clinker and causing an increase in the unit cost of the clinker; High, especially in the later period of use or in summer, it will bring great hidden dangers to the normal operation of the equipment

The overheating of the carcass increases the damage probability of mechanical equipment and accelerates the deformation of the cylinder, and the deformation of the cylinder accelerates the mechanical damage of the inner lining. The result is brick falling and kiln shutdown, which affects the operation rate of the cement rotary kiln

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