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Low-porosity chrome corundum brick and preparation method thereof

A corundum brick and low porosity technology, which is applied in non-ferrous smelting and refractory materials, can solve the problems of limited effect and increased production cost, and achieve the effects of reducing porosity, reducing pollution and improving service life

Inactive Publication Date: 2017-04-26
河南瑞泰耐火材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To increase the Cr in the product 2 o 3 The method of improving the corrosion resistance of chromium corundum bricks with high content not only greatly increases the production cost, but also achieves very limited results

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The low-porosity chromium corundum brick of the present invention is represented by mass percentage, and the raw material composition is: 20% fused white corundum with a particle size of 5-3mm, 20% fused white corundum with a particle size of 3-1mm, and 15% sintered corundum with a particle size of 3-1mm , 10% of 1-0mm fused white corundum, 20% of <0.088mm fused white corundum, 5% of 1-0mm fused chromium oxide, 5% of <0.088mm fused chromium oxide and <0.088mm industrial Grade chromium oxide green 5%; In addition, add aluminum dihydrogen phosphate accounting for 4% of the total mass of all the above-mentioned raw materials as a binder (the specific gravity of aluminum dihydrogen phosphate is 1.50).

[0031] The preparation method of the low-porosity chromium corundum brick described in Example 1 of the present invention, the detailed steps of the method are as follows:

[0032] a. Mixing: First, weigh various raw materials according to the proportion of chrome corundum b...

Embodiment 2

[0039]The low-porosity chromium corundum brick of the present invention is represented by mass percentage, and the raw material composition is: 25% fused sub-white corundum with a particle size of 5-3mm, 22% fused sub-white corundum with a particle size of 3-1mm, and sintered corundum with a particle size of 3-1mm 10%, 15% of fused sub-white corundum of 1-0mm, 11% of fused white corundum <0.088mm, 7% of chrome concentrate of 1-0mm and 10% of industrial grade chromium oxide green <0.088mm; in addition Add phosphoric acid accounting for 3% of the total mass of all the above-mentioned raw materials as a binding agent (the specific gravity of phosphoric acid is 1.45).

[0040] The preparation method of the low-porosity chromium corundum brick described in Example 2 of the present invention, the detailed steps of the method are as follows:

[0041] a. Mixing: First, weigh various raw materials according to the proportion of chrome corundum bricks described in Example 2, add granula...

Embodiment 3

[0048] The low-porosity chromium corundum brick of the present invention is represented by mass percentage, and the raw material composition is: 18% of fused brown corundum with a particle size of 5-3mm, 25% of fused brown corundum with a particle size of 3-1mm, and fused sub-white of 3-1mm Corundum 10%, 1-0mm fused sub-white corundum 11%, <0.088mm fused white corundum 18%, 1-0mm chrome concentrate 8% and <0.088mm industrial grade chromium oxide green 10%; In addition, phosphoric acid accounting for 4% of the total mass of all the above-mentioned raw materials was added as a binding agent (the specific gravity of phosphoric acid is 1.42).

[0049] The preparation method of the low-porosity chromium corundum brick described in Example 3 of the present invention, the detailed steps of the method are as follows:

[0050] a. Mixing: First, weigh various raw materials according to the proportion of chrome corundum bricks described in Example 3, add granular materials with a particl...

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Abstract

The invention discloses a low-porosity chrome corundum brick and a preparation method thereof. The low-porosity chrome corundum brick is prepared from the following raw materials in percentage by mass: 18-28 percent of corundum with the raw material granularity being 5-3mm, 30-40 percent of corundum with the raw material granularity being 3-1mm, 10-20 percent of corundum with the raw material granularity being 1-0mm, 10-20 percent of corundum with the raw material granularity being smaller than 0.088mm, 1-15 percent of high-content chromium ore or fused chrome oxide with the raw material granularity being 1-0mm and 2-15 percent of high-purity chromium oxide with the raw material granularity being smaller than 0.088mm; and in addition, a phosphate binder accounting 2-5 percent for the total mass of all the raw materials is added. According to the low-porosity chrome corundum brick and the preparation method, a product is prepared by material mixing, forming, sintering, impregnating with a nanometer oxide suspension and microwave drying according to burdening of the low-porosity chrome corundum brick, can lower the apparent porosity and the porosity aperture of a chrome corundum material, and reacts with permeated molten slag to form a high melting point substance, increases the viscosity of the molten slag, and slows down permeation of the molten slag.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to low-porosity chromium corundum bricks such as chromium corundum bricks used in the field of nonferrous smelting and a preparation method thereof. Background technique [0002] During the non-ferrous smelting process, the furnace lining material is subjected to high temperature and erosion of liquid slag at the same time. Although the melting temperature of the molten slag encountered is much lower than that encountered by the steel industry, the slag has low viscosity, good fluidity, strong permeability, and serious erosion of lining materials. Chrome corundum bricks are mainly composed of Al 2 o 3 and Cr 2 o 3 Composed of two components, it is characterized by high load softening temperature, good wear resistance, and can resist high-temperature air erosion; strong chemical stability, and strong resistance to neutral to weakly acidic slag. It has been widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/105C04B41/85
CPCC04B35/105C04B41/009C04B41/5072C04B41/85C04B2235/77C04B2235/9607C04B2235/9676C04B41/4535
Inventor 任向阳刘锡俊王杰曾徐琳琳翟鹏涛吕宝磊刘晓磊陈冰冰
Owner 河南瑞泰耐火材料科技有限公司
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