Continuous casting tundish working layer coating

A continuous casting tundish and working layer technology, which is applied in the field of iron and steel metallurgy technology and refractory materials for iron and steel metallurgy, can solve the problems of reducing paint smearability, slag resistance, and reducing coating refractoriness, so as to reduce apparent porosity, Save coating cost, improve compressive strength and flexural strength

Inactive Publication Date: 2012-11-28
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the above-mentioned existing inventions that at present, the continuous casting tundish coatings that use one or both of magnesia or forsterite as the main magnesia material need to add plasticizers such as silica powder, clay, white mud, active lime, etc. These substances can reduce the porosity of the coating and improve the slag penetration resistance of the coating, but because these substances contain almost no MgO, the refractoriness of the coating will be reduced, and if the plasticizer is reduced If the dosage is low, the spreadability and slag resistance of the coating will be reduced; therefore, it is necessary to develop a tundish magnesium working layer coating with better performance

Method used

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  • Continuous casting tundish working layer coating
  • Continuous casting tundish working layer coating
  • Continuous casting tundish working layer coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The main indicators of the Magic Magnesium, boron mud, paper fiber, aluminum powder, and sodium trimer in the middle of the sintering are as follows: the main indicators of raw materials are as follows:

[0028] Magnestes: The mass of MGO in magnesium sand is 94%, the particle size is ≤1mm, and the weight of each particle size range is: 25%of 0.074-1.0 mm, less than 75%of 0.074 mm;

[0029] Boron Pud: The composition of boron mud (mass percentage) indicator is: MGO 35%, Fe 2 O 3 4.0%; the particle size requirements of boron mud are: particle size ≤1mm, and the weight of each particle size range is: 15%of 0.088-1.0 mm, and 85%of less than 0.088 mm;

[0030] Organic fiber: Organic fibers are paper fiber, fiber length ≤1mm;

[0031] Aluminum powder: al> 99%, the particle size is less than 0.074mm;

[0032] Sodium triple gone phosphate: NA 5 P 3 O 10 > 96%, the particle size is less than 0.5mm;

[0033] Follow the following composition ingredients:

[0034] Magnesium sand 90%, ...

Embodiment 2

[0037] The main indicators of the Magic Magnesium, boron mud, paper fiber, aluminum powder, and sodium trimer in the middle of the sintering are as follows: the main indicators of raw materials are as follows:

[0038] Magnestes: The mass of MGO in magnesium sand is 94%, the particle size is ≤1mm, and the weight of each particle size range is: 35%of 0.074-1.0 mm, less than 65%of less than 0.074 mm;

[0039] Boron Pud: The composition of boron mud (mass percentage) indicator is: MGO 40%, Fe 2 O 3 1.0%; the particle size requirements of boron mud are: particle size ≤1mm, and the weight of each particle size range is: 25%of 0.088-1.0 mm, and 75%of less than 0.088 mm;

[0040] Organic fiber: organic fibers are wooden fibers, fiber length ≤1mm;

[0041] Aluminum powder: al> 99%, the particle size is less than 0.074mm;

[0042] Sodium triple gone phosphate: NA 5 P 3 O 10 > 96%, the particle size is less than 0.5mm;

[0043] Follow the following composition ingredients:

[0044] 80%of ma...

Embodiment 3

[0047] The main indicators of the Magic Magnesium, boron mud, paper fiber, aluminum powder, and sodium trimer in the middle of the sintering are as follows: the main indicators of raw materials are as follows:

[0048] Magnestes: The mass of MGO in magnesium sand is 94%, the particle size is ≤1mm, and the weight of each particle size range is: 30%of 0.074-1.0 mm, less than 70%of 0.074 mm;

[0049] Boron Pud: The composition of boron mud (mass percentage) indicator is: MGO 40%, Fe 2 O 3 2.0%; the granularity requirements of boron mud are: particle size ≤1mm, and the weight of each particle size range is: 20%of 0.088-1.0 mm, and 80%of less than 0.088 mm;

[0050] Organic fiber: organic fibers are mixtures of wood fiber and polyethylene fiber, and the fiber length ≤1mm;

[0051] Aluminum powder: al> 99%, the particle size is less than 0.074mm;

[0052] Sodium triple gone phosphate: NA 5 P 3 O 10 > 96%, the particle size is less than 0.5mm;

[0053] Follow the following composition in...

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Abstract

The invention relates to the field of ferrous metallurgy technology and fireproof materials for ferrous metallurgy, in particular to a continuous casting tundish working layer coating. The invention has the following purposes: magnesite and boron mud are used as main base materials to invent a continuous casting tundish working layer magnesian coating without using silica powder, clay, active lime and other plasticizers, properties beneficial to a fireproof working layer, such as high MgO content, high fire resistance, high activity, high plasticity and the like, of the boron mud are fully utilized, and the boron mud is used for replacing the plasticizers used in the prior art, thus recycling the boron mud, improving the fire resistance, slag resistance and the like of the continuous casting tundish magnesian coating as well as prolonging the service life of the continuous casting tundish magnesian coating.

Description

Technical field [0001] The present invention involves the field of steel metallurgy technology and steel metallurgy, and specially involves a continuous cast -to -steel intermediate bag working layer coating. Background technique [0002] As the largest country in the world's steel production steel, the proportion of continuous cast steel has reached more than 97%. The consumption of the refractory material in the middle of the casting intermediate bag is huge. The working layer of the middle bag is magnesium.Important means of refractory material consumption. [0003] In existing technologies, the working layer of the Lianzhong Bags mainly uses magnesium coatings. China's invention patent: a kind of magnesium coating in the linked intermediate bag (application number 200810197325.8) proposes to use magnesium 85-95%, clay 2-6%of clay 2-6%)., Two-6%of sodium phosphate and active lime; Chinese invention patents: a kind of refractory material adds plant explosion-proof fiber (applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王宏明李桂荣赵玉涛朱祥赵钊
Owner JIANGSU UNIV
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