Ladle nozzle brick sintering resistant agent

A technology of anti-sintering agent and nozzle seat brick, which is applied in the field of refractory materials, can solve the problems of damage to the ladle nozzle seat brick, waste of refractory materials, and increase the labor intensity of the upper nozzle brick, so as to improve the service life, reduce the porosity of the inner diameter, and excellent Effect of self-lubricating properties

Inactive Publication Date: 2014-06-18
ZHEJIANG ZILI CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general steel plants, the service life of the ladle nozzle block is more than twice the service life of the ladle upper nozzle brick. During the replacement of the ladle upper nozzle brick, the upper nozzle brick is generally removed by mechanical means, but often due to the upper nozzle brick and the ladle. The nozzle seat bricks are too tightly combined or sintered together, so that the upper nozzle brick is not easy to separate from the ladle nozzle seat brick, thereby increasing the labor intensity during the removal process of the upper nozzle brick, or the ladle nozzle seat brick is damaged during the demolition process, and the ladle needs to be replaced in advance Nozzle seat bricks cause waste of refractory materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An anti-sintering agent for ladle nozzle seat bricks, comprising the following components:

[0029] Grade 90-100 mesh graphite 50kg

[0030] Powdered water glass 18 kg

[0031] Aluminum oxide powder 28kg

[0032] Carboxymethylcellulose 4kg

[0033] When using, mix the above components evenly, and add 28%-32% water. The additional water is general industrial water, that is, general tap water can be used without special requirements. Prepare the anti-sintering agent into gray-black, viscous slurry. Soot blowing and surface cleaning are performed on the inner diameter of the dried or fired nozzle block. Then take the prepared slurry and brush the inner diameter of the ladle nozzle block. The thickness of the coating can be adjusted according to the needs, generally around 1mm.

Embodiment 2

[0035] An anti-sintering agent for ladle nozzle seat bricks, comprising the following components:

[0036] Grade 90-100 mesh graphite 40kg

[0037] Powdered water glass 36 kg

[0038] Aluminum oxide powder 21kg

[0039] Calcium lignosulfonate 3kg

[0040] When using, mix the above components evenly, and add 28%-32% water. Prepare the anti-sintering agent into gray-black, viscous slurry. Soot blowing and surface cleaning are performed on the inner diameter of the dried or fired nozzle block. Then take the prepared slurry and brush the inner diameter of the ladle nozzle block, and the coating thickness can be adjusted according to the needs.

Embodiment 3

[0042] An anti-sintering agent for ladle nozzle seat bricks, comprising the following components:

[0043] Grade 90-100 mesh graphite 30kg

[0044] Powdered water glass 48 kg

[0045] Aluminum oxide powder 18kg

[0046] Carboxymethylcellulose 4kg

[0047] When using, mix the above components evenly, and add 28%-32% water. Prepare the anti-sintering agent into gray-black, viscous slurry. Soot blowing and surface cleaning are performed on the inner diameter of the dried or fired nozzle block. Then take the prepared slurry and brush the inner diameter of the ladle nozzle block, and the coating thickness can be adjusted according to the needs.

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Abstract

The invention discloses a ladle nozzle brick sintering resistant agent. The ladle nozzle brick sintering resistant agent comprises 20-70wt% of 90-100 mesh graphite, 18-48wt% of powdery water glass, 10.5-28wt%of alumina micro-powder, and 1.5-4wt% of an additive. The internal diameter of a ladle nozzle brick is smeared with a ladle nozzle brick sintering resistant agent to reduce or prevent the sintering of the ladle nozzle brick and a nozzle brick over a ladle, so the nozzle brick over the ladle can be removed and replaced, thereby the labor intensity of workers is reduced, the turnaround speed of the ladle nozzle brick is improved, the service life of the ladle nozzle brick is prolonged, the turnaround safety of the ladle nozzle seat brick is guaranteed, and the refractory consumption of the ladle nozzle brick is reduced.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an anti-sintering agent for smearing on the inner diameter of a ladle nozzle block. Background technique [0002] The ladle nozzle block is a very important refractory part in the steelmaking process. Its performance directly affects the service life and safety of the ladle during the operation of the ladle. Therefore, higher requirements are put forward for the use of the ladle nozzle block. : 1 need to be in contact with high-temperature molten steel for a long time, 2 under the premise of satisfying the service life of the ladle, it is convenient to disassemble with the upper nozzle brick. In general steel plants, the service life of the ladle nozzle block is more than twice the service life of the ladle upper nozzle brick. During the replacement of the ladle upper nozzle brick, the upper nozzle brick is generally removed by mechanical means, but often...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 沈明科王强方斌祥孙路安
Owner ZHEJIANG ZILI CORP LTD
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