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Non-combustible non-immersible steel ladle upper nozzle and preparation method thereof

A nozzle and ladle technology, applied in the field of no-burning and non-immersing ladle upper nozzle and its preparation, can solve the problems of solid waste pollution of aluminum chromium slag, etc., and achieve the effects of good thermal shock stability, low cost and high temperature strength

Inactive Publication Date: 2019-03-08
河南新拓耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a non-burning and non-immersing ladle upper nozzle, which introduces aluminum chromium slag into the raw material to replace part of tabular alumina or white corundum, and adds metal aluminum and metal silicon to effectively solve the problem of solid waste of aluminum chromium slag. The pollution problem of waste materials can be realized, and the value-added utilization can be realized. The cost of raw materials per ton can be reduced by 400-800 yuan, and the prepared ladle upper nozzle has the advantages of high temperature strength, good thermal shock stability, erosion resistance and corrosion resistance, and can be used at 100-150 Tons of continuous casting ladles can be used for 15 to 20 times

Method used

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  • Non-combustible non-immersible steel ladle upper nozzle and preparation method thereof

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Effect test

Embodiment 1

[0027] The preparation method of the non-burning and non-immersing ladle upper nozzle provided by the present embodiment comprises the following steps:

[0028] According to parts by weight, add 8 parts of activated alumina micropowder, 2 parts of graphite and 1 part of high-temperature pitch powder, 22 parts of white corundum, 3 parts of metal aluminum, 2 parts of metal silicon and 1 part of boron carbide into a conical mixer and mix evenly. Mix for 30 minutes to obtain mixed powder.

[0029] Add aluminum chrome slag and plate-shaped corundum as aggregates, add them to the kneader for 4 minutes, add 4 parts of thermosetting phenolic resin and knead for 10 minutes, then add the above-mentioned mixed powder and knead for 20-30 minutes, then discharge the material, and keep the material for 18 hours , Machine pressed into bricks, dried at 300°C for 50 hours to make the ladle upper nozzle.

Embodiment 2

[0031] The preparation method of the non-burning and non-immersing ladle upper nozzle provided by the present embodiment comprises the following steps:

[0032] According to parts by weight, add 7 parts of activated alumina micropowder, 2 parts of graphite and 1 part of high-temperature pitch powder, 22 parts of white corundum, 4 parts of metallic aluminum, 2 parts of metallic silicon and 1 part of boron carbide into a conical mixer and mix evenly. Mix for 30 minutes to obtain mixed powder.

[0033] Add aluminum chrome slag and plate-shaped corundum as aggregates, add them to the kneader for 4 minutes, add 4 parts of thermosetting phenolic resin and knead for 10 minutes, then add the above-mentioned mixed powder and knead for 20-30 minutes, then discharge the material, and keep the material for 18 hours , Machine-pressed into bricks, dried at 300°C for 60 hours to make the ladle upper nozzle.

Embodiment 3

[0035] The preparation method of the non-burning and non-immersing ladle upper nozzle provided by the present embodiment comprises the following steps:

[0036] According to parts by weight, add 6 parts of activated alumina micropowder, 2 parts of graphite and 1 part of high-temperature pitch powder, 22 parts of white corundum, 5 parts of metal aluminum, 2 parts of metal silicon and 1 part of boron carbide into a conical mixer and mix evenly. Mix for 30 minutes to obtain mixed powder;

[0037] Add aluminum chrome slag and plate-shaped corundum as aggregates, add them to the mixing machine for 4 minutes, add 4 parts of thermosetting phenolic resin and mix them for 10 minutes, then add the above-mentioned mixed powder and mix them for 20-30 minutes before discharging, and keep the materials for 20 hours , Machine-pressed into bricks, dried at 200°C for 48 hours to make the ladle upper nozzle.

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Abstract

The invention discloses a non-combustible non-immersible steel ladle upper nozzle and a preparation method thereof, and relates to the technical field of preparation of a steel ladle upper nozzle. Specifically, alumina-chrome slag is introduced into raw materials of the steel ladle upper nozzle and is used for replacing partial tabular corundum or white corundum, and metallic aluminum, metallic silicon and boron carbide are added, so that the pollution problem of alumina-chrome slag solid waste can be effectively solved, value-added utilization can be realized, and the cost of raw materials per tonnage can be reduced by 400 to 800 yuan; the prepared steel ladle upper nozzle has the advantages that the high-temperature strength is high, the thermal shock stability is good, and molten steelcorrosion resistance is strong, the steel ladle upper nozzle can be used on a continuous casting steel ladle upper nozzle which is 100 to 150 tonnage, and the using requirements of 15 to 20 times canbe achieved.

Description

technical field [0001] The invention relates to the technical field of ladle nozzle preparation, in particular to a non-burning and non-immersion ladle nozzle and a preparation method thereof. Background technique [0002] The upper nozzle of the ladle is installed at the bottom of the ladle, and the lower part is connected with the sliding nozzle. In the process of use, due to the excessive expansion of the hole and the severe erosion of the working surface, the molten steel leaks, and in severe cases, the pouring stops. Therefore, the upper nozzle needs higher quality and stability requirements to ensure safe casting. [0003] In recent years, advanced casting techniques such as multi-furnace continuous casting and high-efficiency casting have put forward higher requirements for thermal shock resistance, corrosion resistance, wear resistance, and high-strength mechanical properties of nozzle bricks. Now Products in existing technologies are difficult to meet the requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
CPCC04B35/62204C04B35/66C04B2235/3217C04B2235/3821C04B2235/402C04B2235/425C04B2235/428
Inventor 卫忠贤郭明臣刘光良刘华平郝书民杜军闫国宏刘威
Owner 河南新拓耐火材料有限公司
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