Steel ladle bottom castable

A bottom pouring and ladle technology, applied in the field of refractory materials, can solve the problems of inconsistent erosion rate of the bottom of the ladle and the erosion rate of the refractory material of the wall, affecting the service life of the ladle, and short service life of the material, and achieves good thermal insulation effect and good thermal shock effect. , the effect of improving the service life

Inactive Publication Date: 2019-11-15
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the temperature of molten steel increases, the residence time of molten steel in the ladle prolongs, so that the refractory lining of the ladle is subjected to greater erosion loss, while the refractory material at the bottom of the ladle is directly subjected to the erosion of the steel flow during the steelmaking process, and the erosion rate of the ladle bottom and the The erosion rate of the wall refractories is inconsistent, resulting in the life of the refractories at the bottom of the ladle being lower than that of the refractories at other parts of the ladle, which directly affects the overall service life of the ladle
At the s

Method used

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  • Steel ladle bottom castable
  • Steel ladle bottom castable

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A ladle bottom pouring material, made of the following components by weight percentage: 20% of prefabricated block particles with a particle size of 8-35mm, 15% of black aluminum sand particles with a particle size of 3-5mm, and 18% of particles with a particle size of 1-3mm black aluminum sand particles, 10% black aluminum sand particles with a particle size of 0-1mm, 6% fused magnesium aluminum spinel with a particle size of 0-1, and 7% white corundum 200 mesh fine powder , 3% sintered spinel with a particle size of 500 mesh, 1% steel fiber, 0.15% organic fiber, 7% α-alumina powder with a particle size of 1u, 3.8% α-alumina with a particle size of 3u Micropowder, 6% pure calcium aluminate cement, 0.5% sodium hexametaphosphate, 2.5% silica micropowder, 0.02% metal aluminum powder and 0.03% citric acid.

[0030] The steps of preparing the ladle bottom castable are as follows:

[0031] ①. Mix the raw materials according to the set ratio and particle size composition, th...

Embodiment 2

[0035] A ladle bottom pouring material, made of the following components by weight percentage: 20% of prefabricated block particles with a particle size of 8-35mm, 12% of black aluminum sand particles with a particle size of 3-5mm, and 20% of particles with a particle size of 1-3mm black aluminum sand particles, 10% black aluminum sand particles with a particle size of 0-1mm, 6% fused magnesium aluminum spinel with a particle size of 0-1, and 7% white corundum 200 mesh fine powder , 3% sintered spinel with a particle size of 500 mesh, 1% steel fiber, 0.15% organic fiber, 7% α-alumina powder with a particle size of 1u, 3.8% α-alumina with a particle size of 3u Micropowder, 6% pure calcium aluminate cement, 0.5% sodium hexametaphosphate, 3.5% silica micropowder, 0.02% metal aluminum powder and 0.03% citric acid.

[0036] The steps of preparing the ladle bottom castable are as follows:

[0037] ①. Mix the raw materials according to the set ratio and particle size composition, th...

Embodiment 3

[0041]A ladle bottom pouring material, made of the following components by weight percentage: 20% of prefabricated block particles with a particle size of 8-35mm, 15% of black aluminum sand particles with a particle size of 3-5mm, and 18% of particles with a particle size of 1-3mm black aluminum sand particles, 10% black aluminum sand particles with a particle size of 0-1mm, 6% fused magnesium aluminum spinel with a particle size of 0-1, and 7% white corundum 200 mesh fine powder , 3% sintered spinel with a particle size of 500 mesh, 1% steel fiber, 0.15% organic fiber, 7% α-alumina powder with a particle size of 1u, 3.8% α-alumina with a particle size of 3u Micropowder, 6% pure calcium aluminate cement, 0.5% sodium hexametaphosphate, 2.5% silica micropowder, 0.02% metal aluminum powder and 0.03% citric acid.

[0042] The steps of preparing the ladle bottom castable are as follows:

[0043] ①. Mix the raw materials according to the set ratio and particle size composition, the...

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Abstract

The invention discloses steel ladle bottom castable. The steel ladle bottom castable comprises 15-25% of precast blocks, 40-50% of black aloxite, 5-10% of fused magnesium aluminate spinel, 5-15% of white corundum, 1-5% of sintered spinel, 0.5-1.5% of fibers, 5-10% of activated aluminium oxide micro-powder, 5-10% of a binder, 0.5-1% of a superplasticizer, 2-5% of silica powder, 0.01-0.05% of citricacid and 0.01-0.05% of metal aluminum powder, wherein the particle size of aggregate of the precast blocks is 8-35 mm, and the particle size of the metal aluminum powder is 60 meshes. According to the steel ladle bottom castable, the main raw material aggregate is the industrial by-product black aloxite, thus slag is reused, waste discharge is reduced, the production cost of the steel ladle bottom castable is reduced, moreover, in the steel ladle bottom castable, the content of the black aloxite is high, a thermal shock effect is good, the service life of a fire-resistant product is prolonged, a heat conductivity coefficient of the black aloxite is small, a heat insulation effect is good, a safety factor of a steel ladle is high, and the scouring resistance of the steel ladle bottom castable is improved, so that better use prospects are brought.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a ladle bottom castable. Background technique [0002] With the development of refining outside the furnace and continuous casting technology and the increase in market demand for cleanliness, the requirements for ladle smelting conditions are getting higher and higher, and the service life of refractory materials for ladles is getting longer and longer. As the temperature of molten steel increases, the residence time of molten steel in the ladle prolongs, so that the refractory lining of the ladle is subjected to greater erosion loss, while the refractory material at the bottom of the ladle is directly subjected to the erosion of the steel flow during the steelmaking process, and the erosion rate of the ladle bottom and the The inconsistency in the erosion rate of the wall refractories leads to a lower service life of the refractory materials at the bottom of the la...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/76C04B35/622C04B38/00B22D41/02
CPCB22D41/02C04B35/62204C04B35/66C04B35/76C04B38/00C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/402C04B2235/5212C04B2235/77C04B2235/96C04B2235/9684C04B38/0067C04B38/0074
Inventor 何枫王团收李健张盛耿鹏任林赵现华刘丽颜浩赵伟
Owner 北京利尔高温材料股份有限公司
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