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Steel ladle castable taking alumina-based homogenized material as matrix

A ladle pouring and homogenizing material technology, which is applied in the field of refractory castables, can solve problems such as loss of product quality stability, pits at the bottom of the ladle, poor materials, etc., and achieve the effect of improving the overall anti-corrosion performance and the overall age of the ladle

Pending Publication Date: 2020-06-30
李向威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the gradual compression of costs, the materials used are getting worse and worse, which leads to cracks and pits in the bottom of the ladle castable during use. The stability of product quality is lost, and the span of use performance is also large. It even led to several small and medium-sized accidents of steel piercing and leakage in some steel plants

Method used

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  • Steel ladle castable taking alumina-based homogenized material as matrix
  • Steel ladle castable taking alumina-based homogenized material as matrix
  • Steel ladle castable taking alumina-based homogenized material as matrix

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A ladle castable based on alumina-based homogenized material, prepared according to the following mass percentages:

[0024]

[0025] The content of particle gradation 8mm < particle size ≤ 25mm in bauxite-based homogeneous material shall not exceed 5%;

[0026] The particle size of the binder is controlled below 1mm.

[0027] Wherein: the mass content of iron oxide in the bauxite-based homogeneous material with an alumina content of 75-80% is 1.47%.

[0028] The particle size of alumina fine powder is 80-120 mesh.

[0029] The particle size of silica micropowder is 0.1-0.5 micron.

[0030] Pure calcium aluminate cement Calcium aluminate cement with an alumina content of 58-72%.

[0031] The homogenized synthetic material is produced by controlling the feed composition, grading storage, uniform distribution, fine material blending, wet grinding, concentrated filter press, vacuum extrusion, drying, high-temperature calcination, crushing and grading.

Embodiment 2

[0033] A ladle castable based on alumina-based homogenized material, prepared according to the following mass percentages:

[0034]

[0035] The content of particle gradation 8mm<particle size≤25mm in the alumina-based homogeneous material does not exceed 5%;

[0036] The particle size of the binder is controlled below 1 mm.

[0037] Wherein, the mass content of iron oxide in the alumina-based homogeneous material with an alumina content of 75-80% is 1.35%.

[0038] The particle size of alumina fine powder is 80-120 mesh.

[0039] The particle size of silica micropowder is 0.1-0.5 micron.

[0040] Pure calcium aluminate cement Calcium aluminate cement with an alumina content of 58-72%.

Embodiment 3

[0042] A ladle castable based on alumina-based homogenized material, prepared according to the following mass percentages:

[0043]

[0044] The content of particle gradation 8mm<particle size≤25mm in the alumina-based homogeneous material does not exceed 5%;

[0045] The particle size of the binder is controlled below 1 mm.

[0046] Wherein, the mass content of iron oxide in the alumina-based homogeneous material with an alumina content of 75-80% is 1.45%.

[0047] The particle size of alumina fine powder is 80-120 mesh.

[0048] The particle size of silica micropowder is 0.1-0.5 micron.

[0049] Pure calcium aluminate cement Calcium aluminate cement with an alumina content of 58-72%.

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Abstract

The invention relates to the technical field of refractory castables, and specifically to a steel ladle castable taking alumina-based homogenized material as matrix. The steel ladle castable is prepared by taking the alumina-based homogenized material with the alumina content of 75-80% as an aggregate, and alumina micro-powder, silicon dioxide micro-powder, pure calcium aluminate cement and a binding agent as auxiliary materials, and the content of the alumina-based homogenized material with the particle size larger than 8 mm and smaller than or equal to 25 mm is smaller than or equal to 5%. And the particle size of the binding agent is controlled below 1mm. According to the invention, a raw material grading control technology is combined with a superfine powder technology; the grain composition of the homogeneous material, especially the amount of large particles, is adjusted, so that the overall erosion resistance of the castable is improved, the overall ladle life of a steel ladle is prolonged, the ladle life of an existing steel ladle is prolonged from 110 times to 160 times or above, and more benefits of 4000-6000 tons of steel are brought to users.

Description

technical field [0001] The invention relates to the technical field of refractory castables, in particular to a ladle castable with an alumina-based homogenized material as a matrix. Background technique [0002] The ladle is a container that plays an important role in the steelmaking process. In order to increase the life of the ladle and reduce the consumption of refractory materials, the refractory material of the ladle is developing from amorphous to amorphous refractory materials. The development of ladle castables needs to be traced back to the 20th century in the 1980s. It started with water glass combined with aluminum-magnesium castables, and then developed to the second generation of anhydrous glass aluminum-magnesium castables. It has been widely used in recent years. Spinel castables, such as alum clay spinel castables, magnesium spinel castables, aluminum spinel castables, etc. At present, aluminum-magnesium castables are still the mainstream, and high-alumina ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101B22D41/02
CPCB22D41/02C04B35/101C04B2235/3201C04B2235/3208C04B2235/3222C04B2235/3418C04B2235/3463C04B2235/5208C04B2235/5427C04B2235/5445C04B2235/96C04B2235/9615C04B2235/9676
Inventor 李向威
Owner 李向威
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