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Aluminum silicon carbide nitrogen refractory product for blast furnace tuyere and preparation method thereof

A refractory product, silicon carbide nitrogen technology, applied in the field of refractory materials, can solve the problems of high energy consumption, achieve the effect of improving physical properties, solving high thermal conductivity and low thermal conductivity

Active Publication Date: 2022-05-31
REFRACTORY MATERIAL OF SINOSTEEL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the present invention, since silicon carbide with excellent thermal conductivity and corundum with low thermal conductivity are used to replace the current blast furnace tuyere refractory products with high thermal conductivity, the problems of serious heat loss and high energy consumption in the materials currently used are solved

Method used

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  • Aluminum silicon carbide nitrogen refractory product for blast furnace tuyere and preparation method thereof
  • Aluminum silicon carbide nitrogen refractory product for blast furnace tuyere and preparation method thereof
  • Aluminum silicon carbide nitrogen refractory product for blast furnace tuyere and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Metal silicon powder (180 mesh): 89 parts

[0029] At least 4 magnets are suspended under the ball mill, and each time an abrasive is released, the iron filings on the magnet are cleaned once.

[0030] Clean up the site and related equipment before the operation.

[0034]

Embodiment 2

[0043] Metal silicon powder (180 mesh): 288.5 parts

[0046] At least 4 magnets are suspended under the ball mill, and each time an abrasive is released, the iron filings on the magnet are cleaned once.

[0047] Clean up the site and related equipment before the operation.

[0048] Mud material ratio: 50 parts of tabular corundum aggregate, 50 parts of co-milled powder, 9 parts of dextrin powder, 11 parts of pulp powder, 10 parts of water. That

Embodiment 3

[0058] Metal silicon powder (180 mesh): 146 parts

[0061] At least 4 magnets are suspended under the ball mill, and each time an abrasive is released, the iron filings on the magnet are cleaned once.

[0062] Clean up the site and related equipment before the operation.

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Abstract

A method for preparing aluminum silicon carbide nitrogen refractory products for blast furnace tuyere. The raw materials are tabular corundum aggregate, tabular corundum fine powder, silicon carbide fine powder, metal silicon powder, and admixtures, through co-grinding and wet milling. It is made by nitriding and firing at a temperature above 1480°C; among them, the weight parts of raw materials are: 50-70 parts of tabular corundum aggregate, 2-26 parts of tabular corundum fine powder, and 7-15 parts of silicon carbide fine powder , 8-30 parts of metal silicon powder; the admixture is 1.8-5% of the total weight of the original material. The aluminum silicon carbide nitrogen refractory product prepared by the present invention has all the characteristics of silicon carbide products, and the thermal conductivity is only 6‑8W / (m·K) at 200°C, which is lower than that of silicon carbide at 200°C 30‑35W / (m·K) increased by 4‑5 times.

Description

A kind of aluminum silicon carbide nitrogen refractory product for blast furnace tuyere and preparation method thereof technical field The present invention relates to refractory material technical field, be specifically related to a kind of aluminum silicon carbide nitrogen refractory product for blast furnace tuyere and its preparation method. Background technique Along with the increase of blast furnace large-scale and smelting intensity, more and more attention is paid to the maintenance of the furnace body itself, and the tuyere as a high One of the key parts of the furnace, its use effect has a direct impact on the service life of the blast furnace. Under harsh conditions such as high temperature and high load resistance, it can withstand high temperature, frequent temperature differences, and the erosion of alkali atmosphere in the furnace. To withstand higher loads. [0003] Along with the upgrading of blast furnace tuyere and the difference in design concept...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/103C04B35/65
CPCC04B35/103C04B35/65C04B2235/9607C04B2235/447C04B2235/606C04B2235/6586C04B2235/3873C04B2235/3869C04B2235/96C04B2235/77C04B2235/9615C04B2235/9692C04B2235/9676C04B2235/3826C04B2235/428Y02P20/10
Inventor 翟皖予许大燕范亚娟王瑞肖伟王光强刘会林
Owner REFRACTORY MATERIAL OF SINOSTEEL CORP
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