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Tundish coating and preparation method thereof

A smear and tundish technology, which is applied to ceramic products, other household appliances, applications, etc., can solve the problems of cracks, collapse, and peeling after the tundish smear is cured, and shortens the online baking time. The effect of shortening construction and maintenance time and improving production efficiency

Active Publication Date: 2019-06-14
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a tundish smear and its preparation method, which solves the problems in the prior art that the tundish smear is prone to cracks after curing, and the on-line baking is prone to collapse and peeling off.

Method used

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  • Tundish coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for tundish smear, the steps are as follows:

[0024] (1) Weigh all raw materials according to weight ratio: 20% of sintered magnesia with a particle size of 3 to 1 mm, 32% of sintered magnesia with a particle size of 1 to 0.1 mm, 40% of sintered magnesia with a particle size of not more than 0.075 mm %, 1.5% of paper fiber and organic fiber mixed in a ratio of 10:1, 3% of silicon micropowder, 3.5% of plasticizer (bentonite and Guangxi white clay mixed in a ratio of 1:1), 0.5% of sodium tripolyphosphate, sodium carbonate 0.5%.

[0025] (2) Pour the sintered magnesia particles with a particle size of 3-1 mm and a particle size of 1-0.1 mm into the sand mixer and stir for 3 minutes, then add silicon micropowder and sodium tripolyphosphate and stir for 1 minute to form mixture;

[0026] (3) Add sintered magnesia fine powder, plasticizer fine powder, fiber and sodium carbonate with a particle size not greater than 0.075 mm to the mixture prepared in s...

Embodiment 2

[0028] A preparation method for tundish smear, the steps are as follows:

[0029] (1) Weigh all the raw materials according to weight ratio: 20% of sintered magnesia with a particle size of 3 to 1 mm, 32% of sintered magnesia with a particle size of 1 to 0.1 mm, and 39% of sintered magnesia with a particle size of no more than 0.075 mm %, 1.35% of paper fiber and organic fiber mixed in a ratio of 10:1, 2% of microsilica powder, 2.75% of plasticizer (bentonite and red clay mixed in a ratio of 1:1), 0.4% of sodium hexametaphosphate, and 1.5% of calcium carbonate %.

[0030] (2) Pour the sintered magnesia particles with a particle size of 3-1 mm and a particle size of 1-0.1 mm into the sand mixer and stir for 3 minutes, then add silicon micropowder and sodium tripolyphosphate and stir for 1 minute to form mixture;

[0031] (3) Add sintered magnesia fine powder, plasticizer fine powder, fiber and sodium carbonate with a particle size not greater than 0.075 mm to the mixture prep...

Embodiment 3

[0033] A preparation method for tundish smear, the steps are as follows:

[0034] (1) Weigh all raw materials according to weight ratio: 20% of sintered magnesia with a particle size of 3-1 mm, 32% of sintered magnesia with a particle size of 1-0.1 mm, and 38% of sintered magnesia with a particle size of no more than 0.075 mm. %, 1.2% of paper fiber and organic fiber mixed in a ratio of 10:1, 1% of silicon micropowder, 2% of plasticizer (bentonite and red clay mixed in a ratio of 1:1), 0.3% of sodium hexametaphosphate, 2.5% of magnesium carbonate %.

[0035] (2) Pour the sintered magnesia particles with a particle size of 3-1 mm and a particle size of 1-0.1 mm into the sand mixer and stir for 3 minutes, then add silicon micropowder and sodium tripolyphosphate and stir for 1 minute to form mixture;

[0036] (3) Add sintered magnesia fine powder, plasticizer fine powder, fiber and sodium carbonate with a particle size not greater than 0.075 mm to the mixture prepared in step (...

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Abstract

The invention provides tundish coating and a preparation method thereof. The tundish coating is prepared from the following raw materials in percentage by weight: 20% of magnesite clinker with the particle size being 3 mm to 1 mm, 32% of magnesite clinker with the particle size being 1 mm to 0.1 mm, 38-40% of magnesite clinker with the particle size being not greater than 0.075 mm, 1.2-1.5% of fiber, 1-3% of a binding agent, 2-3.5% of a plasticizer, 0.3-0.5% of a dispersant, and 0.5-2.5% of a raising agent; and the raising agent is carbonate or a mixture of the carbonate and acidoid. The tundish coating has the following beneficial effects that the situation that during high-temperature baking, concentrated drainage of water in the coating is extremely fast, consequently, the coating is cracked, peeled, chipped off and even collapsed is prevented; and the construction maintenance time and the online baking time of the coating can be greatly shortened, and the production efficiency of asteel mill is greatly improved.

Description

technical field [0001] The invention relates to the technical field of refractory preparation, in particular to a tundish smear and a preparation method thereof. Background technique [0002] The tundish is a refractory container used in short-process steelmaking, which receives molten steel poured from the ladle, and then distributes it to each crystallizer through its nozzle. With the continuous development of metallurgical technology, the tundish, which is the last refining vessel of continuous casting molten steel, puts forward higher and higher requirements on the performance of its refractory materials. [0003] The use of tundish smearing material can not only improve the quality of steel billet and the service life of tundish working lining, but also reduce the consumption of refractory materials in tundish, which has good economic benefits. At present, in order to ensure that the tundish smear has good construction performance, a certain proportion of plasticizers,...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B38/02
Inventor 于九利郑浩赵现华任林刘丽颜浩赵伟胡玲军
Owner 北京利尔高温材料股份有限公司
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