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Compact electro-fused corundum-spinel ladle casting material

A technology of ladle casting and fused corundum, applied in the field of unshaped refractory materials, can solve the problems of damage to the ladle body, cracking of ladle castables, unsatisfactory thermal shock stability, etc., and achieves reduction of apparent pores, improvement of strength, and prevention of penetration. and erosion effects

Inactive Publication Date: 2014-02-05
PINGXIANG JINGXIANG IND
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The unshaped working lining of ladle is the general trend of the world. With the continuous progress of superfine powder and high-efficiency admixture technology, more high-quality refractory materials and advanced scientific research results are used to make the high-temperature strength of ladle castable, anti-corrosion Corrosion and erosion resistance are gradually improving, but the thermal shock stability is still not ideal. When subjected to a large thermal shock, it is easy to cause cracks in the ladle castable, and peeling off causes the ladle to be damaged.

Method used

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  • Compact electro-fused corundum-spinel ladle casting material

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Embodiment Construction

[0009] A ladle lining (melt pool pouring) applied to pouring of 100t ladle castables.

[0010] In terms of weight percentage, dense fused corundum particle size is 15-20% for 25-15mm, 20-25% for 15-8mm, 20-30% for 8-1mm, 5-15% for ≤0.074mm. Spinel particle size 1-0.5mm is 5-15%, sintered spinel particle size ≤0A074mm is 1-15%, alumina fine powder is 1-10%, magnesia fine powder ≤0.088mm is 0.5-5%, silicon Micro powder is 0.05-0.5%, sodium tripolyphosphate is 0.1-0.5%, polypropylene fiber is 0.01-0.1%, calcium aluminum magnesium oxide cement binder is 5-15%, and the sum of the above components is 100%. After fully stirring evenly, add <4% tap water, stir evenly, pour into molding, cure, bake, and remove the mold to obtain the inner lining of the ladle.

[0011] Example Dense fused corundum - main technical performance table of spinel ladle castable

[0012]

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Abstract

The invention relates to a compact electro-fused corundum-spinel ladle casting material, and belongs to the field of unshaped refractory material. According to the invention, compact electro-fused corundum, electro-fused spinel, and sintered spinel are adopted as main raw materials; alumina micro-powder, magnesium grain fine powder, silicon micro-powder, sodium tripolyphosphate, and polypropylene fiber are adopted as auxiliary materials; calcium aluminum magnesium cement is adopted as a binding agent; and a ladle working lining is obtained by uniform mixing and casting forming. The material specifically comprises the raw materials of, by weight: 50-80% of 25-0.074mm compact electro-fused corundum, 5-20% of electro-fused spinel, 1-15% of sintered spinel with a specification no higher than 0.074mm, 5-20% of the auxiliary raw materials with a specification no higher than 0.088mm, and 1-15% of the binding agent calcium aluminum magnesium cement. According to the ladle casting material provided by the invention, erosion and corrosion resistances are substantially improved, and service live of ladle lining is prolonged.

Description

technical field [0001] The invention belongs to the field of unshaped refractory materials, in particular to a dense electric fused steel-spinel ladle castable. Background technique [0002] The unshaped working lining of ladle is the general trend of the world. With the continuous progress of superfine powder and high-efficiency admixture technology, more high-quality refractory materials and advanced scientific research results are used to make the high-temperature strength of ladle castable, anti-corrosion Corrosion and erosion resistance are gradually improving, but the thermal shock stability is still not ideal. When subjected to a large thermal shock, it is easy to cause cracks in the ladle castable, and the spalling causes damage to the ladle. Contents of the invention [0003] The object of the present invention is to provide a ladle lining with less water addition, simple construction, short maintenance, short baking time, no pollution to molten steel, high flexur...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 高兴奎艾革蔡献忠杨晓红张狄青高东杰杨晓芳
Owner PINGXIANG JINGXIANG IND
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