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Castable for steel ladle integral casting working lining

A technology of integral pouring and castables, which is applied in the field of refractory materials, can solve the problems of weakened slag resistance of castables, affecting service life, poor resistance to slag erosion and permeability of corundum or bauxite, and achieves slag resistance and permeability Excellent, reduced raw material cost, excellent effect of slag resistance

Inactive Publication Date: 2018-05-29
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, corundum or bauxite is generally used as the aggregate in castables for the overall pouring of ladles in large and medium-sized steel mills in China. Because corundum or bauxite has poor slag resistance and permeability, the slag resistance of the castable is weakened. thereby affecting its service life

Method used

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  • Castable for steel ladle integral casting working lining
  • Castable for steel ladle integral casting working lining
  • Castable for steel ladle integral casting working lining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The castable for ladle integral pouring working lining with alumina-spinel composite material as aggregate is made by mixing the following raw materials by weight percentage: 72% alumina-spinel composite phase aggregate, 10% Corundum fine powder, 14% alumina fine powder, 4% binder; plus 1% dispersant, 0.01% explosion-proof agent, 0.1% anti-bleeding agent.

[0026] In this example, the alumina-spinel composite phase aggregate is divided into four grades according to the particle size: 5mm<particle size≤8mm, 3mm<particle size≤5mm, 1mm<particle size≤3mm, and particle size≤1mm. The weight percentage 8%, 32%, 30% and 30% respectively; the particle size of corundum fine powder is divided into two gradations of 20μm<particle size≤45μm and <particle size≤20μm, and the weight ratio is 2:1; Alumina micropowder, the particle size is ≤5μm; the binder is pure calcium aluminate cement; the dispersant is polycarboxylate dispersant ADS1 / ADW1 (product of Qingdao Anmai Aluminum Co.); the...

Embodiment 2

[0028] The castable for ladle integral pouring working lining with alumina-spinel composite material as aggregate is made by mixing the following raw materials by weight percentage: 65% alumina-spinel composite material, 15% corundum Fine powder, 15% alumina fine powder, 5% binder; plus 0.1% dispersant, 0.05% explosion-proof agent, 0.05% anti-bleeding agent.

[0029] In this example, the alumina-spinel composite phase aggregate is divided into four grades according to the particle size: 5mm<particle size≤8mm, 3mm<particle size≤5mm, 1mm<particle size≤3mm, and particle size≤1mm. The weight percentage 15%, 35%, 30% and 20% respectively; the particle size of corundum fine powder is divided into two gradations: 20μm<particle size≤45μm and <particle size≤20μm, the weight ratio is 3:1; Alumina micropowder, its particle size is ≤ 5 μ m; Described binding agent is hydrated alumina; Dispersant is polycarboxylate dispersant FS60 (product of German BASF company); The combination of anaer...

Embodiment 3

[0031] The castable for ladle integral pouring working lining with alumina-spinel composite material as aggregate is made by mixing the following raw materials by weight percentage: 68% alumina-spinel composite phase aggregate, 15% Corundum fine powder, 10% alumina fine powder, 7% binder; plus 0.15% dispersant, 0.05% explosion-proof agent, 0.2% anti-bleeding agent.

[0032]In this example, the alumina-spinel composite phase aggregate is divided into four grades according to the particle size: 5mm<particle size≤8mm, 3mm<particle size≤5mm, 1mm<particle size≤3mm, and particle size≤1mm. The weight percentage 15%, 30%, 30% and 25% respectively; the particle size of corundum fine powder is divided into two gradations of 20μm<particle size≤45μm and <particle size≤20μm, and its weight ratio is 2.5:1; Any one of alumina micropowder or activated alumina micropowder or a mixture of the two, the particle size is ≤5μm; the binder is aluminosilica gel powder; the dispersant is a phosphate d...

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Abstract

The invention discloses a castable for a steel ladle integral casting working lining. The castable is prepared by mixing raw materials including, by weight, 65-72% of aluminum oxide-spinel complex phase aggregates, 10-15% of corundum fine powder, 10-18% of alumina micro-powder, 4-7% of binding agents, 0.1-1% of additional dispersing agents, 0.01-0.1% of additional detonation inhibitors and 0.01-0.2% of additional bleeding prevention agents. Aluminum oxide-spinel complex phase materials serve as the aggregates to prepare the castable for the steel ladle integral casting working lining, and thecastable is excellent in slag corrosion resistance and penetration resistance, low in cost, good in thermal shock resistance, slight in expansion and long in service life and solves the problems of poor slag corrosion resistance and penetration resistance as current castables for steel ladle integral casting working linings extensively use corundum or alumina as an aggregate.

Description

technical field [0001] The invention relates to a refractory material, in particular to a casting material for integral casting of a ladle for working lining. Background technique [0002] In recent years, with the continuous increase of the smelting ratio of various types of steel and the promotion of low-cost manufacturing technology in steel mills, the application of monolithic refractory materials has become more and more extensive. , No pollution, simple and efficient construction, excellent thermal insulation effect, and significant reduction in material consumption and production costs brought about by continuous casting, it has been widely used. This product has gradually become an important direction for the development of refractory technology. [0003] At present, corundum or bauxite is generally used as the aggregate in castables for the overall pouring of ladles in large and medium-sized steel mills in China. Because corundum or bauxite has poor slag resistance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101B22D41/02
CPCB22D41/02C04B35/101C04B2235/3222C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/96C04B2235/9615C04B2235/9676
Inventor 王志强雷中兴彭肖仟徐炎明
Owner WUGANG REFRACTORY CO LTD
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