High abrasion-proof anti-heat vibration high-alumina brick and preparation thereof

Abstract

The invention discloses a high abrasion-resistance and thermal shock-resistance high alumina brick, comprising the following compositions, by weight: 5 to 15 parts of 3 to 5mm special grade bauxite aggregate, 30 to 40 parts of 1 to 3mm special grade bauxite aggregate, 10 to 20 parts of 0 to 1mm special grade bauxite aggregate, 20 to 30 parts of special grade bauxite fine powder, 5 to 7 parts of zircon sand fine powder, 1 to 3 parts of Suzhou No.2 mud, 8 to 10 parts of complex binding agent and 4 to 6 parts of water. The invention also discloses a manufacturing method of the high abrasion-resistance and thermal shock-resistance high alumina brick. The high abrasion-resistance and thermal shock-resistance high alumina brick has properties of high intensity, refractoriness and high abrasion-resistance and thermal shock resistance. The high alumina brick and the manufacturing method are applied to circulating fluidized bed boiler cyclone separator flues, cyclone separator straight sections and cones, return feeders, metallurgical industrial furnaces and other heat equipment, and have advantages of simple manufacturing process and easy realization.

Description

A high wear-resistant and thermal shock-resistant high-alumina brick and its manufacturing method technical field The invention belongs to the field of refractory materials, and in particular relates to a high-alumina brick with high wear resistance and thermal shock resistance and a manufacturing method thereof. Background technique In the circulating fluidized bed boiler, the cyclone separator is one of the most critical parts of the fluidized bed boiler, and the refractory materials used in these parts must have good wear resistance and thermal shock stability. The most commonly used refractory materials in these parts are PA bricks or high alumina castables. The inlet flue of the cyclone separator, the straight section and the cone section of the separator have high flow velocity, high ash concentration, and severe wear, especially within the range of tangential angle of 120° at the flue gas inlet, due to the erosion of high-speed gas-solid two-phase flow, Resulting i...

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Problems solved by technology

The inlet flue of the cyclone separator, the straight section and the cone section of the separator have high flow velocity, high ash concentration, and severe wear, especially within the range of tangential angle of 120° at the flue gas inlet, due to the erosion of high-speed gas-solid two-phase flow, Caused severe wear and tear on the part