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Method for preparing Sialon material inside blast furnace

A technology of al2o3-sic and blast furnace, which is applied in the field of refractory material production for blast furnace ironmaking, can solve the problems of large one-time investment, high cost, high cost, etc., achieve great economic and social benefits, save production costs, and prolong blast furnace The effect of longevity

Active Publication Date: 2014-02-05
巩义市时创新材料孵化器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Thirty years ago, the refractory materials used in blast furnace ironmaking were mainly clay bricks and high alumina bricks. The refractoriness of these bricks was generally around 1700°C, but the actual temperature of the blast furnace bosh was higher than the refractoriness of refractory bricks, resulting in The service life of the refractories in the inner high-temperature area is short, which affects the service life of the blast furnace. The service life of blast furnaces in my country is 3-4 years. Furnace wall to support blast furnace ironmaking
However, Sialon combined with Al 2 o 3 -SiC refractories must be fired in a nitrogen atmosphere, the cost is high, and the one-time investment is large. Many iron and steel companies are not willing to invest high costs to use this superior material

Method used

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  • Method for preparing Sialon material inside blast furnace
  • Method for preparing Sialon material inside blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The construction material used in the construction body of this embodiment consists of the following materials in parts by weight: Al 2 o 3 50 parts of materials (the mass percentage of low-carbon brown corundum is 90%, and the rest is α-Al 2 o 3 Ultrafine powder; Fe in low carbon brown corundum 2 o 3 The mass percentage is 0.4-0.6%, TiO 2 1-3% by mass), 10 parts of SiC, 8 parts of silicon-aluminum alloy powder (the mass ratio of Al:Si is 1:3), 2 parts of C powder, and 5 parts of water;

[0028] The pressing material used is made up of the following materials in parts by weight: Al 2 o 3 50 parts of materials (the mass percentage of low-carbon brown corundum is 90%, and the rest is α-Al 2 o 3 Ultrafine powder; Fe in low carbon brown corundum 2 o 3 The mass percentage is 0.4-0.6%, TiO2 The mass percentage is 1-3%), 10 parts of SiC, 8 parts of silicon aluminum alloy powder (the mass ratio of Al to Si is 1:3.5), 2 parts of C powder, 0.1 part of rare earth oxide (...

Embodiment 2

[0034] The construction material used in the construction body of this embodiment consists of the following parts by weight: Al 2 o 3 60 parts of materials (the mass of low-carbon brown corundum accounted for Al 2 o 3 95% of the material, the rest is α-Al 2 o 3 Ultrafine powder; Fe in low carbon brown corundum 2 o 3 The mass percentage is 0.4-0.6%, TiO 2 The mass percentage is 1-3%), 30 parts of SiC, 12 parts of silicon aluminum alloy powder (the mass ratio of Al:Si is 1:4), 3 parts of C powder, 2 parts of rare earth oxide (from xenotime), 5 parts clay, 4 parts water.

[0035] The pressing material used is composed of the following parts by weight: Al 2 o 3 60 parts of materials (the mass of low-carbon brown corundum accounted for Al 2 o 3 95% of the material, the rest is α-Al 2 o 3 Ultrafine powder; Fe in low carbon brown corundum 2 o 3 The mass percentage is 0.4-0.6%, TiO 2 The mass percentage is 1-3%), 30 parts of SiC, 12 parts of silicon aluminum alloy powd...

Embodiment 3

[0043] The construction material used in the construction body of this embodiment consists of the following parts by weight: Al 2 o 3 55 parts of materials (the mass percentage of low-carbon brown corundum is 93%, and the rest is white corundum powder; Fe in low-carbon brown corundum 2 o 3 The mass percentage is 0.4-0.7%, TiO 2 The mass percentage is 1-3%), 20 parts of SiC, 10 parts of silicon-aluminum alloy powder (the mass ratio of Al:Si is 1:3.5), 1 part of rare earth oxide (from bastnaesite), and 5 parts of water.

[0044] The pressing material used is composed of the following parts by weight: Al 2 o 3 55 parts of materials (the mass percentage of low-carbon brown corundum is 93%, the rest is white corundum powder, Fe in low-carbon brown corundum 2 o 3 The mass percentage is 0.4-0.7%, TiO 2 The mass percentage is 1-3%), 20 parts of SiC, 10 parts of silicon-aluminum alloy powder (the mass ratio of Al:Si is 1:3.8), and the particle size of the pressed material is ≤3m...

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Abstract

The invention discloses a method for preparing a Sialon material inside a blast furnace. The method comprises the following steps: when performing fireproofing material machining inside the blast furnace, pre-burying a fire waste tube inside a construction body, wherein a fire waste tube inlet and a fire waste tube outlet are formed in a furnace wall; when the blast furnace is used, burning the fire waste tube to form a channel, introducing nitrogen into the channel, sealing up the channel outlet when the amounts at the inlet and outlet of the channel are identical, stopping introducing the nitrogen, pressing a filling material into the channel and pressing tightly, and subsequently normally operating the blast furnace. When the Sialon material is prepared inside the blast furnace by using the method, the method is simple and reasonable, and application and preparation of Sialon are integrated, so that the production cost is greatly saved, and redundant nitrogen of steel companies is sufficiently utilized. The method is applicable to large and small blast furnaces, the service life of the blast furnace is prolonged, and great economic and social benefits are brought to the companies.

Description

technical field [0001] The invention belongs to the technical field of production of refractory materials for blast furnace ironmaking, and in particular relates to a preparation method of a Sialon material in a blast furnace. Background technique [0002] Thirty years ago, the refractory materials used in blast furnace ironmaking were mainly clay bricks and high alumina bricks. The refractoriness of these bricks was generally around 1700°C, but the actual temperature of the blast furnace bosh was higher than the refractoriness of refractory bricks, resulting in The service life of the refractories in the inner high-temperature area is short, which affects the service life of the blast furnace. The service life of blast furnaces in my country is 3-4 years. The furnace wall thus supports blast furnace ironmaking. [0003] Si 3 N 4 Combined with SiC bricks, the furnace life of the blast furnace can reach 15 years. Later, it was found in the research of ceramics that Si 3 N ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/599
Inventor 李明建李仲翟李云霄李明君赵超
Owner 巩义市时创新材料孵化器有限公司
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