Lining patching material of iron-smelting blast furnace

The invention relates to a furnace lining repairing and iron-making blast furnace technology, which is applied in the field of repairing materials, and can solve the problems of increasing the maintenance cost and high price of smelting enterprises, and achieve the effects of reducing the maintenance cost, good refractoriness and slag resistance.

Inactive Publication Date: 2010-12-22
郑州九环科贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When adopting the above-mentioned thermal gunning lining process, due to the high price of the existing repair material (about 8500 yuan / ton), plus the construction cost (2000-3000 yuan / time), the maintenance cost of the smelting enterprise is increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The iron-making blast furnace lining repair material of the present invention is made of raw materials alumina powder, silicon carbide powder, mullite powder, active α-A1 2 o 3 Powder, pure calcium aluminate cement and silica micropowder are formulated according to the following weight percentages: 50% alumina powder with a purity of 88%, particle size 5μm; 2% alumina powder with a purity of 95%, particle size 1μm; silicon carbide powder 25% material, particle size 5μm; mullite powder 13% (3% particle size 5μm, 10% particle size 1μm); active α-A1 2 o 3 Powder 4%, particle size 50μm; pure calcium aluminate cement 3%, particle size 55μm; silica powder 3%, particle size 1μm.

[0021] The above powders are mixed in proportion and packaged for storage. When using, add water according to the ratio of water / ash = 8%, and then use JH-60 gunning equipment to repair the damaged inner lining of the blast furnace. This repair material is especially suitable for repairing furna...

Embodiment 2

[0023] The iron-making blast furnace lining repair material of the present invention is made of raw materials alumina powder, silicon carbide powder, mullite powder, active α-A1 2 o 3 Powder, pure calcium aluminate cement and silicon micropowder are formulated according to the following weight percentages: 70% alumina powder with a purity of 88%, particle size 4μm, 3% alumina powder with a purity of 95%, particle size 2μm; silicon carbide powder 15% material, particle size 2μm; mullite powder 3%, particle size 5μm; active α-A1 2 o 3 Powder 2%, particle size 100μm; pure calcium aluminate cement 4%, particle size 100μm; silica powder 3%, particle size 3μm.

[0024] The above powders are mixed in proportion and packaged for storage. When using, add water according to the ratio of water / ash = 8%, and then use JH-60 gunning equipment to repair the damaged inner lining of the blast furnace. This repair material is especially suitable for repairing furnace shaft, furnace waist, ...

Embodiment 3

[0026] The iron-making blast furnace lining repair material of the present invention is made of raw materials alumina powder, silicon carbide powder, mullite powder, active α-A1 2 o 3 Powder, pure calcium aluminate cement and silicon micropowder are formulated according to the following weight percentages: 55% alumina powder with a purity of 88%, particle size 3μm, 5% alumina powder with a purity of 95%, particle size 1μm; silicon carbide powder 18% material, particle size 3μm; mullite powder 8%, particle size 3μm; active α-A1 2 o 3 Powder 3%, particle size 50μm; pure calcium aluminate cement 6%, particle size 60μm; silica powder 5%, particle size 2μm.

[0027] The above powders are mixed in proportion and packaged for storage. When using, add water according to the ratio of water / ash = 8%, and then use JH-60 gunning equipment to repair the damaged inner lining of the blast furnace. This repair material is especially suitable for repairing furnace shaft, furnace waist, fu...

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Abstract

The invention discloses a lining patching material of the iron-smelting blast furnace. The lining patching material is prepared from the following raw materials by weight percent: 50-70% of aluminum oxide powder with the purity of 88%, 2-5% of aluminum oxide powder with the purity of 95%, 15-25% of silicon carbide powder, 3-13% of mullite powder, 2-4% of activated alpha-A12O3 powder, 3-6% of purecalcium aluminate cement and 3-5% of silica micropowder. When used, the patching material is weighted according to the area and part of the lining to be parched, water is added to mix, and a spray-repair device is used to perform hot spray-repair to the lining of the blast furnace. The lining patching material of the invention has the advantage that mullite powder, silicon carbide powder, aluminum oxide powder and alpha-A12O3 powder are used as the aggregate and base material of the hot patching material of the blast furnace and pure calcium aluminate cement and silica micropowder are used asthe bonding agents, thus ensuring that the patching material has good fire resistance and slag resistance when the operating temperature is above 1400 DEG C; and the cost of the patching material andthe construction cost can be reduced, thus greatly reducing the maintenance cost of smelting enterprises for patching the blast furnace.

Description

technical field [0001] The invention relates to a repairing material, in particular to a repairing material for ironmaking blast furnace lining which restores a reasonable furnace shape and reduces energy consumption. Background technique [0002] Blast furnace is a smelting equipment that has been in continuous high-temperature production for a long time. During long-term operation, the lining of the blast furnace is corroded and peeled off, causing local or large-area damage, which affects the normal operation of the blast furnace. Therefore, prolonging the service life of the blast furnace has always been a topic of concern to smelting engineering technicians. The longevity of the blast furnace is an ironmaking technology. One of the indicators of development level. In the maintenance of blast furnaces, the traditional method of stopping production and shutting down the furnace for maintenance, re-laying bricks and re-lining is expensive, time-consuming and labor-intensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李福寿
Owner 郑州九环科贸有限公司
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