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High-strength environment-friendly stemming material

An environment-friendly, high-strength technology, applied in the field of refractory materials and high-strength and environment-friendly taphole clay, can solve the problems that the taphole channel is not resistant to the scouring of molten iron and slag, the taphole channel is not resistant to molten iron and slag, and is harmful to human health. , to achieve the effect of improving the strength of the mud, reducing the porosity and improving the oxidation resistance.

Inactive Publication Date: 2017-01-25
CHANGXING MINGTIAN FURNACE CHARGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tar-bonded blasthole mud is better in drillability and operability, but if the ratio is not appropriate, the strength is relatively low. Therefore, the formed iron channel is not resistant to the erosion of molten iron and slag. Therefore, the formed iron channel It is not resistant to the erosion of molten iron and slag, the hole expansion is serious, and the molten iron splashes heavily; in addition, because the binder of the tar series contains carcinogens such as benzopyrene and phenol, it pollutes the environment and is harmful to human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-strength environment-friendly gun clay of the present invention comprises the following components and the mass ratio of each component is: brown corundum: 15 parts, bauxite: 10 parts, clay: 5 parts, and SiC-C compound: 3 parts, silicon carbide powder: 4 parts, sericite: 4 parts, alumina powder: 10 parts, Si 3 N 4 For: 3 parts, coke parts: 2 parts and environmental binder: 2 parts.

Embodiment 2

[0022] A high-strength environment-friendly gun clay of the present invention comprises the following components and the mass ratio of each component is: brown corundum: 18 parts, bauxite: 12 parts, clay: 8 parts, and SiC-C compound: 4 parts, silicon carbide powder: 5 parts, sericite: 5 parts, alumina powder: 12 parts, Si 3 N 4 For: 4 parts, coke parts: 3 parts and environmental binder: 3 parts.

Embodiment 3

[0024] A high-strength environment-friendly gun clay of the present invention comprises the following components and the mass ratio of each component is: brown corundum: 20 parts, bauxite: 15 parts, clay: 10 parts, and SiC-C compound: 5 parts, silicon carbide powder: 6 parts, sericite: 6 parts, alumina powder: 15 parts, Si 3 N 4 For: 5 parts, coke parts: 4 parts and environmental binder: 4 parts.

[0025] The performance index of a kind of high-strength environment-friendly type gun clay of the present invention is:

[0026] 1. Main chemical composition (%): Al2O3≥50

[0027] SiC+C≥32

[0028] 2. Bulk density (g / cm3): ≥2.10 after 1350℃×3h buried carbon burning

[0029] 3. Normal temperature compressive strength (Mpa): ≥26 after 1350℃×3h buried carbon burning

[0030] 4. Heating permanent line change (%): 1350℃×3h after buried carbon burning -0.6~+0.8

[0031] 5. Blast furnace type: 2500m 3 above

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Abstract

The invention discloses a high-strength environment-friendly stemming material. The stemming material is prepared from the following ingredients, by the mass proportion, 15-20 parts of brown fused alumina, 10-15 parts of alumina, 5-10 parts of clay, 3-5 parts of SiC-C composition materials, 4-6 parts of silicon carbide powder, 4-6 parts of sericite, 10-15 parts of alumina micro powder, 3-5 parts of Si3N4, 2-4 parts of coke powder and 2-4 parts of an environment-friendly binder; compared with a prior art, the high-strength environment-friendly stemming material is characterized by improving volume density and matrix strength of the stemming material, having no pollution to environment in production and use, and being environment friendly.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of refractory materials, in particular to the technical field of high-strength environment-friendly gun clay. [0003] 【Background technique】 [0004] With the advancement of ironmaking technology, new technologies such as high wind pressure, high top pressure, high smelting intensity, large air volume, and oxygen-enriched injection have been adopted in large blast furnaces. come higher. The function of the gun mud is to fill the tap channel, and to protect the formation and growth of the mud bag in the hearth to maintain a sufficient tap depth; at the same time, it should be easy to open and easy to mud operation, and the formed tap channel can resist Physical and chemical erosion caused by slag and iron. Tar-bonded blasthole mud is better in drillability and operability, but if the ratio is not appropriate, the strength is relatively low. Therefore, the formed iron channel is not resistant to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/101
CPCC04B35/66C04B35/101C04B2235/3427C04B2235/3481C04B2235/349C04B2235/3826C04B2235/3873C04B2235/422
Inventor 佘亚锋金金佘凤娅佘成明王娇章亚
Owner CHANGXING MINGTIAN FURNACE CHARGE
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