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Tundish coating and preparation method thereof

A smear and tundish technology, applied in the field of tundish smear and its preparation technology, can solve the problems of poor lubricating performance, easy to fall off, weak bonding performance, etc., achieve good lubricating performance, ensure purity, and enhance bonding performance effect

Inactive Publication Date: 2017-05-31
周九喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, at present, the tundish smears used in large domestic steel mills have always had the defects of weak bonding performance, easy to fall off after smearing, and poor lubricating performance.

Method used

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  • Tundish coating and preparation method thereof

Examples

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Effect test

preparation example Construction

[0015] A preparation method for a tundish coating material, comprising the following steps:

[0016] (1) Crush the waste magnesia bricks to obtain waste magnesia brick particles; grind part of the waste magnesia brick particles into a powder with a diameter of less than or equal to 200 mesh; the other part is sieved through a 1mm and 3mm sieve to obtain a particle with a diameter between 0-1mm Waste magnesia brick particles between 1-3mm.

[0017] (2) Grind the magnesium powder into a powder with a diameter of 200 mesh or less.

[0018] (3) Detect the screened and ground waste magnesia brick particles and powder and magnesia powder.

[0019] (4) Proportioning the tested raw materials, silicon micropowder, water glass and hemp fiber according to the ratio of claim 1; mixing the raw materials for 5-10 minutes after the blending.

[0020] (5) The finished product after kneading is sub-packaged.

Embodiment 1

[0022] A tundish smear material, its main raw materials include waste magnesia bricks and 96 magnesia, and auxiliary materials include silicon micropowder, water glass and hemp fiber. The proportion of each component is as follows: the weight percentage of 200 mesh waste magnesia brick powder is 13%; the weight percentage of waste magnesia brick particles with a diameter of 0-1mm is 28%; %; The weight percentage of 200 order 96 magnesia is 7%; The weight percentage of silicon micropowder is 3%; The weight percentage of water glass is 0.2%; The weight percentage of hemp fiber is 0.9%.

[0023] A preparation method for a tundish coating material, comprising the following steps:

[0024] (1) Crush the waste magnesia bricks to obtain waste magnesia brick particles; grind part of the waste magnesia brick particles into a powder with a diameter of less than or equal to 200 mesh; the other part is sieved through a 1mm and 3mm sieve to obtain a particle with a diameter between 0-1mm ...

Embodiment 2

[0030] A tundish smear material, its main raw materials include waste magnesia bricks and 96 magnesia, and auxiliary materials include silicon micropowder, water glass and hemp fiber. The proportion of each component is as follows: the weight percentage of 200 mesh waste magnesium brick powder is 15%; the weight percentage of waste magnesium brick particles with a diameter of 0-1mm is 31%; the weight percentage of waste magnesium brick particles with a diameter of 1-3mm is 34% %; The weight percentage of 200 order 96 magnesia is 10%; The weight percentage of silicon micropowder is 5%; The weight percentage of water glass is 0.5%; The weight percentage of hemp fiber is 1.1%.

[0031] A preparation method for a tundish coating material, comprising the following steps:

[0032] (1) Crush the waste magnesia bricks to obtain waste magnesia brick particles; grind part of the waste magnesia brick particles into a powder with a diameter of less than or equal to 200 mesh; the other par...

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Abstract

The invention discloses tundish coating and a preparation method thereof. The tundish coating comprises 15-27% of 200-mesh waste magnesia brick powder, 28-34% of waste magnesia brick particles with the diameter of 0-1mm, 30-38% of waste magnesia brick particles with the diameter of 1-3mm, 5-13% of 200-mesh magnesite powder, 1-7% of silicon micropowder, 0.01-0.8% of water glass and 0.8-2% of jute fiber. The tundish coating provided by the invention uses the waste magnesia brick and the magnesia as main raw materials, and the silicon micropowder, the water glass and the jute fiber are added as auxiliary materials, so that a good bonding effect can be achieved and the bonding performance can be enhanced; the silicon micropowder is added, so that the stability of the tundish coating can be enhanced and shedding of the tundish coating can be prevented; the tundish coating is good in lubricating property; the tundish coating prevents impurities in molten steel so as to ensure the purity of the molten steel.

Description

technical field [0001] The invention relates to an unshaped refractory material, in particular to a smear material for a tundish in a steelmaking process and a preparation process thereof. Background technique [0002] The tundish is an essential equipment in the continuous casting process. In the steelmaking and continuous casting process, initially the tundish only acts as a buffer period between the ladle and the crystallizer. With the optimization of the continuous casting process and the improvement of the quality requirements of the continuous casting slab, the tundish has evolved into an intermediate equipment for molten steel refining. It has two main functions: one is the refining of molten steel; the other is the elimination of non-metallic inclusions. [0003] According to the construction and use process requirements, the smearing material for the blind plate of the tundish needs to have good smearing performance, not fall off after drying, and have good bonding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 周九喜
Owner 周九喜
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