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Bottom fire-proof material of large steel ladle

A technology of ladle bottom and refractory materials, which is applied in the field of refractory materials to achieve the effects of prolonging service life, low cost and avoiding carbon increase

Inactive Publication Date: 2005-10-12
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to improve the high-temperature volume behavior stability of the bottom cladding refractory material, reduce its load softening temperature, increase the service life of the bottom cladding working lining and reduce material consumption

Method used

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  • Bottom fire-proof material of large steel ladle
  • Bottom fire-proof material of large steel ladle

Examples

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Embodiment Construction

[0034] The raw material ratio of the materials in Examples 1-4 is shown in Table 3. The magnesia binder is selected from DMG75 of Jiangsu Yixing Dongsheng Kiln Industry New Material Company, and the preparation of the bottom refractory material adopts a conventional preparation method, which is different from the existing non-fired The performance comparison of high alumina bricks is shown in Table 4. According to the ratio of Table 3, the material for producing the bottom of the ladle was carried out on the bottom of a 300-ton ladle, and the real furnace test of on-site pouring was carried out. The service life of the test product reached more than 100 furnaces under the condition that the cost was lower than that of non-fired high-alumina bricks, which was more than 3 times the life of the bottom of the original non-fired high-alumina bricks. No peeling damage occurred in the actual furnace test.

[0035] raw material

[0036]

[0037] The bauxite-aluminu...

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Abstract

A refractory material used as the bottom of large ladle for prparing ultralow-carbon steel is proportionally prepared from special-grade alumine, superfine megnesite, almag spinel powder, superfine silicon powder, megnesium adhesive and disperser.

Description

[0001] Technical field: The present invention relates to a refractory material, in particular to a large ladle bottom refractory material. Background technique: [0002] The structure of the refractory working lining at the bottom of the large ladle is complex, and the setting of prefabricated blocks, breathable bricks and nozzle seat bricks in the impact zone of the ladle restricts the change of the working lining refractory structure at the bottom of the ladle, so that the temperature distribution and stress distribution of the working lining at the bottom of the ladle complication. Since the ladle bottom working lining refractory material is in the plane strictly restricted by the ladle shell, the use damage of the ladle bottom refractory material, in addition to the erosion of high temperature molten steel and slag, also has damage caused by peeling, cracking and steel penetration , The reasons for spalling, cracking and infiltration of the bottom cladding refractory are t...

Claims

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Application Information

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IPC IPC(8): B22D41/02C04B35/10
Inventor 陈荣荣牟济宁何平显赵明陈金荣汪宁甘菲芳
Owner BAOSHAN IRON & STEEL CO LTD
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