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Castable

A castable and microporous technology, applied in the field of refractory materials, can solve the problems affecting the service life and general performance of the ladle, and achieve the effects of increasing thermal shock resistance, high temperature performance and service life.

Inactive Publication Date: 2016-12-14
张婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the working layer of the ladle generally uses spinel castables, but the performance of the ladle lining is average at present, so it directly affects the service life of the ladle. How to improve the service life of the ladle and improve the performance of the working layer of the ladle is the most important Therefore, the performance improvement of the ladle lining castable becomes the key to prolonging the service life of the ladle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A castable, the use part is the direct lining of the ladle and the molten steel, wherein the weight percentage of each component is: the weight percentage of each component is: sub-white corundum 12-8mm is 15%, sintered microporous aluminum spinel 8 -5mm is 14%, sintered microporous aluminum spinel 5-3mm is 15%, sintered microporous aluminum spinel 3-1mm is 13%, sintered microporous aluminum spinel≤1mm is 30%, carbon dioxide Chromium powder 1%, composite gel powder 5%, hydrated alumina micropowder 1%, pearl clay powder 1%, bismuth germanate powder 0.5%, modified pure calcium aluminate cement 4.5%, plus C 7 h 10 N 2 o 2 S0.1%, C 21 h 14 Na 2 o 6 S 2 0.1%, 2-morpholineethanesulfonic acid 0.05%. Mix the above ingredients evenly to obtain the ladle castable.

[0015] Experimental test was carried out with a castable formula of Example 1: adding 5wt% water accounting for the weight of the above formula, the test performance indicators were as follows: the bulk densi...

Embodiment 2

[0017] A castable, wherein the weight percentage of each component is: the weight percentage of each component is: 14% for sub-white corundum 12-8mm, 15% for sintered microporous aluminum spinel 8-5mm, 15% for sintered microporous aluminum spinel Stone 5-3mm is 15%, sintered microporous aluminum spinel 3-1mm is 12%, sintered microporous aluminum spinel ≤ 1mm is 30%, modified magnesia-calcium sand ≤ 1mm is 2%, and chromium dicarbide Powder 1%, composite gel powder 5%, hydrated alumina powder 1%, pearl clay powder 1%, bismuth germanate powder 0.5%, modified pure calcium aluminate cement 3.5%, plus C 7 h 10 N 2 o 2 S0.1%, C 21 h 14 Na 2 o 6 S 2 0.1%, 2-morpholineethanesulfonic acid 0.05%. Mix the above ingredients evenly to obtain the ladle castable.

[0018] Experimental test was carried out with the castable formula of Example 2: add water accounting for 6wt% of the above formula, and the test performance indicators are as follows: the bulk density is 2.9 / cm 3 The fle...

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Abstract

The invention relates to castable, in particular to castable for ladle linings or working layers. In order to solve the technical problem, the castable is provided to be used for a direct lining, making contact with molten steel, of a steel ladle. The castable is prepared from, by weight, 8%-20% of sub-white corundum ranging from 12 mm to 8 mm, 11%-15% of sintered porous alumina spinel ranging from 8 mm to 5 mm, 12%-15% of sintered porous alumina spinel ranging from 5 mm to 3 mm, 10%-15% of sintered porous alumina spinel ranging from 3 mm to 1 mm, 30%-35% of sintered porous alumina spinel smaller than or equal to 1 mm, 0-5% of modified dead burned high-calcium magnesite smaller than or equal to 1 mm, 1% of tri-chromium dicarbide powder, 3%-5% of compound gel powder, 1% of hydrated alumina micro powder, 1% of nacrite powder, 0.5% of bismuth germanate powder, 3%-5% of modified pure calcium aluminate cement, 0.1% of C7H10N2O2S, 0.1% of C21H14Na2O6S2 and 0.05% of 2-morpholineethanesulfonic acid. According to the castable, the reaction degree of the steel ladle lining material and slag can be reduced, high-temperature performance and slag corrosion resistance of a ladle product with slag resistance are improved, thermal shock resistance of the ladle is greatly improved, the service life of an integrally poured ladle is effectively prolonged, and the service life is prolonged by 30% or above compared with ordinary same types of ladles.

Description

[0001] This application is a divisional application with application number 201510380582.5. technical field [0002] The invention relates to a refractory material, in particular to a refractory castable used in the working layer of a ladle. Background technique [0003] The refractory material in direct contact with the molten steel in the ladle is called the working layer of the ladle. In the prior art, the working layer of the ladle generally uses spinel castables, but the performance of the ladle lining is average at present, so it directly affects the service life of the ladle. How to improve the service life of the ladle and improve the performance of the working layer of the ladle is the most important Therefore, the performance improvement of the ladle lining castable becomes the key to prolonging the service life of the ladle. Contents of the invention [0004] In order to solve the above technical problems, the present invention provides a castable, which can re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/77C04B2235/96
Inventor 张婷
Owner 张婷
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