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

A thermal shock-resistant, high-alumina brick technology, applied in the field of refractory materials, can solve the problems of high ash concentration, high flow rate, wear and other problems, achieve high refractoriness and wear resistance, good thermal shock resistance, improve erosion resistance and heat resistance The effect of shock performance

Inactive Publication Date: 2009-01-14
江苏耐基炉衬有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 15 parts of 3-5mm super-grade bauxite aggregate, 30 parts of 1-3mm super-grade bauxite aggregate, 20 parts of 0-1mm super-grade bauxite aggregate, 28 parts of 220 mesh super-grade bauxite fine powder, 5 parts of 320 Purpose Zircon sand fine powder, 2 parts of Suzhou No. 2 mud, 9 parts of composite binder, and 4 parts of water are mixed and pressed on a 3150KN friction brick press, and the bulk density of the semi-finished product is 2.92~3.07g.cm -3 . After baking at 90°C for 24 hours, the residual moisture of the green body is ≤2%. Firing can be fired by pusher kiln or tunnel kiln, and fired at 1500°C to 1550°C for 4 hours to obtain the desired finished high-abrasion-resistant and thermal-shock-resistant high-alumina brick.

Embodiment 2

[0030] Take 10 parts of 3-5mm super-grade bauxite aggregate, 38 parts of 1-3mm super-grade bauxite aggregate, 15 parts of 0-1mm super-grade bauxite aggregate, 30 parts of 220 mesh super-grade bauxite fine powder, 6 parts of 320 Purpose Zircon sand fine powder, 1 part of Suzhou No. 2 mud, 8 parts of composite binder, 5 parts of water are mixed and pressed on a 3150KN friction brick press, and the bulk density of the semi-finished product is 2.9-3.05g.cm -3 . After baking at 80°C for 36 hours, the residual moisture of the green body is ≤2%. Firing can be fired in pusher kiln or tunnel kiln, and fired at 1500°C to 1550°C for 3 hours to obtain the desired finished high-alumina brick with high wear resistance and thermal shock resistance.

Embodiment 3

[0032] Mix 5 parts of 3-5mm super-grade bauxite aggregate, 40 parts of 1-3mm super-grade high-alumina bauxite aggregate, 20 parts of 0-1mm super-grade bauxite aggregate, 25 parts of 220-mesh super-grade bauxite fine powder, 7 Parts of 320-mesh zircon sand fine powder, 3 parts of Suzhou No. 2 mud, 10 parts of composite binder, 6 parts of water are mixed and pressed on a 3150KN friction brick press, and the bulk density of the semi-finished product is 2.85-3.02g.cm -3 . After baking at 60°C for 48 hours, the residual moisture of the green body is ≤2%. Firing can be fired by pusher kiln or tunnel kiln, and fired at 1500°C to 1550°C for 3.5 hours to obtain the desired finished high-abrasion-resistant and thermal-shock-resistant high-alumina brick.

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PUM

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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

technical field [0001] 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 [0002] 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 in severe wear and tear on this part. Contents of the invention [0003] The prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/10
Inventor 毛荣新毛荣棠毛小平杨华峰
Owner 江苏耐基炉衬有限公司
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