Ladle kerb casting material and ladle kerb preparation method thereof

A technology of castables and ladles, applied in the field of refractory materials, can solve the problems of waste of available resources, environmental protection, increase of production costs, etc., and achieve the effect of realizing secondary utilization, reducing environmental pollution and reducing consumption

Inactive Publication Date: 2009-11-18
HENAN GENGSHENG REFRACTORIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not only do companies need to buy land to accumulate or bury these increasing waste materials, which increases production costs, but ...

Method used

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  • Ladle kerb casting material and ladle kerb preparation method thereof
  • Ladle kerb casting material and ladle kerb preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 A kind of pouring material along the ladle, which is composed of the following raw material components (by weight percentage, the same below):

[0054] Granularity of 1 ~ 8mm Al-Mg ladle lining waste 70%, 0.044 ~ 0.2mm high alumina bauxite (Al 2 o 3 ≥70%) 7%, 0.2-1mm high alumina bauxite 8%, silica superfine powder (≤0.02μm) 6%, 0.044-0.088mm magnesium oxide fine powder 8.9%, sodium tripolyphosphate 0.1%. The above aluminum-magnesium ladle lining waste was originally made of the following raw materials: 75% of high-alumina bauxite with a particle size of 0.088-8mm, 7% of high-purity ρ-alumina micropowder, 8% of silicon dioxide superfine powder, sodium hexametaphosphate or / and sodium trimetaphosphate 0.2%, 1 ~ 0.044mm magnesium oxide fine powder 9.8%.

[0055]The method for preparing the ladle rim by using the above-mentioned ladle rim pouring material, the steps are as follows:

[0056] 1) Manually sort the recycled ladle lining waste, and remove the a...

Embodiment 2

[0061] Embodiment 2 A kind of pouring material along with ladle, is made up of following raw material composition:

[0062] Aluminum-magnesium ladle lining waste with a particle size of 1-8mm 60%, bauxite 0.044-0.2mm 8%, bauxite 0.2-1mm 12%, superfine silica powder (≤0.02μm) 10%, bauxite 0.044- 0.088mm magnesium oxide fine powder 9.98%, sodium tripolyphosphate 0.02%. The above aluminum-magnesium ladle lining waste was originally made of the following raw materials: 90% of high-alumina bauxite with a particle size of 0.088-8mm, 3% of high-purity rho-alumina micropowder, 3.9% of silicon dioxide superfine powder, sodium hexametaphosphate or / and sodium trimetaphosphate 0.1%, 1-0.044mm magnesium oxide fine powder 3%.

[0063] The method for preparing the ladle rim by using the above-mentioned ladle rim castable is the same as that in Example 1.

Embodiment 3

[0064] Embodiment 3 A kind of pouring material along with ladle, is made up of following raw material composition:

[0065] Aluminum-magnesium ladle lining waste with a particle size of 1-8mm 82%, 0.044-0.2mm high-bauxite 4%, 0.2-1mm high-bauxite 6%, silica ultrafine powder (≤0.02μm) 2%, 0.044~ 0.088mm magnesium oxide fine powder 5%, sodium hexapolyphosphate 0.5%, sodium tripolyphosphate 0.5%. The above aluminum-magnesium ladle lining waste was originally made of the following raw materials: 65% of high-alumina bauxite with a particle size of 0.088-8mm, 10% of high-purity rho-alumina micropowder, 10% of silicon dioxide superfine powder, sodium hexametaphosphate or / and sodium trimetaphosphate 0.3%, 1 ~ 0.044mm magnesium oxide fine powder 14.7%.

[0066] The method for preparing the ladle rim by using the above-mentioned ladle rim castable is basically the same as that in Embodiment 1.

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Abstract

The invention relates to ladle kerb casting material and a ladle kerb preparation method by the ladle kerb casting material. The casting material comprises the following components in weight percentage: 60-82% of ladle lining waste having a grain size of 1-8mm, 10-20% of bauxite grain size of 0.044-1mm, 2-10% of silicon dioxide superfine(less than or equal to 0.02mum), 5-10% of magnesium oxide fine powder grain size of 0.044-0.088 and 0.01-1% of sodium polyphosphate. The preparation method comprises ladle kerb lining waste selecting, crushing, mixing evenly and adding water while stirring, casting, maintaining, baking and the like. The waste ladle kerb casting material is recycled by the preparation method so that the production cost of the fireproof materials and the steel-making cost can be obviously reduced, the economic benefit is improved and the social meaning of protecting environment and saving energy can be realized; the ladle kerb prepared by the ladle kerb casting material has the advantages of good high-temperature volume stability, enough common/ medium/ high temperature strength, strong anti-slag corrosion and anti erosion-corrosion, thus satisfying the requirements for maintaining the normal running of the ladles.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a castable for a ladle rim and a method for preparing a ladle rim by using the castable. Background technique [0002] With the development of continuous casting and refining technology outside the furnace, part of the refining process is transferred from the steelmaking furnace to the ladle. The ladle is not only a high-temperature container for storing molten steel, but also for refining molten steel in a vacuum, becoming a unique metallurgical equipment. In order to increase the service life of ladles and reduce the consumption of refractory materials, the refractory materials used in ladles have evolved from mainly shaped to unshaped refractories, and have developed to fully unshaped. From the aspects of economy, labor saving, environment, etc., pouring construction has become an effective method for ladle construction, and various advantages of pouring construction have ...

Claims

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Application Information

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IPC IPC(8): C04B35/66B22D41/02
Inventor 徐德亭浦李刚胡波张顺庆石凯张光普
Owner HENAN GENGSHENG REFRACTORIES
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