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Carbon-free sliding plate and manufacturing method thereof

A technology of carbon sliding plate and aluminum titanate, which is applied in the field of refractory materials for steelmaking, can solve the problems of fast erosion, reduced service life, and failure to meet the use requirements, etc., achieve excellent thermal shock resistance and erosion resistance, and avoid carbonization Effect

Active Publication Date: 2013-01-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the slide plates of these materials are eroded quickly when casting high-oxygen steel, and the service life is significantly reduced, which cannot meet the use requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Aluminum titanate is synthesized by electric fusion with magnesium oxide as a stabilizer, and the mass percentage of each component in the raw material is Al 2 o 3 53%, TiO 2 40%, MgO4%, and the rest are impurity elements in the electromelting process. The particle gradation is as follows: 1-3mm particles: 35%, particles smaller than 1mm: 35%, powders not larger than 325 mesh: 30%.

[0025] Stir the aggregate together evenly, then add 3% carboxymethylcellulose binder, stir for 5 minutes, so that the particle surface is evenly coated with a layer of binder, then add aluminum titanate powder, and stir for 30 minutes for later use. Put the stirred raw materials into the mold for high-pressure molding, dry and then fire at 1500°C.

Embodiment 2

[0027] Aluminum titanate is synthesized by electric fusion with cerium oxide as a stabilizer, and the mass percentage of each component in the raw material is Al 2 o 3 52%, TiO 2 42%, CeO 2 4%, the rest are impurity elements in the electromelting process, and the particle gradation is as follows: 1-3mm particles: 45%, particles smaller than 1mm: 25%, powders not larger than 325 mesh: 30%.

[0028] Stir the aggregate together evenly, add 4% polyvinyl alcohol binder, stir for 3 minutes, so that the particle surface is evenly coated with a layer of binder, then add aluminum titanate powder, and stir for 20 minutes for later use. Put the stirred raw materials into the mold for high-pressure molding, dry and then fire at 1450°C.

Embodiment 3

[0030] Using magnesium oxide and cerium oxide as stabilizers to synthesize aluminum titanate, the mass percentage of each component in the raw material is Al 2 o 3 51%, TiO 2 41%, CeO 2 2%, MgO3%, and the rest are impurity elements in the electromelting process. The particle gradation is as follows: 1-3mm particles: 40%, particles smaller than 1mm: 35%, powders not larger than 325 mesh: 25%.

[0031] Stir the aggregate together evenly, then add 5% yellow dextrin binder, stir for 5 minutes, so that the particle surface is evenly coated with a layer of binder, then add aluminum titanate powder, and stir for 30 minutes for later use. Put the stirred raw materials into the mold for high-pressure molding, dry and then fire at 1480°C.

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Abstract

The invention relates to a carbon-free sliding plate, which is characterized in that aluminum titanate synthesized through electrofusion is adopted as a raw material, and binding agent combination is performed to prepare the carbon-free sliding plate, wherein components in the aluminum titanate synthesized through electrofusion comprise, by mass, 50-54% of Al2O3, 40-43% of TiO2, 2-5% of a stabilizer, and the balance of impurities, and the stabilizer is one or more selected from magnesium oxide or cerium oxide. According to the present invention, the aluminum titanate synthesized through electrofusion is adopted as the main raw material, the binding agent is added, and processes of spray granulation, high pressure molding, drying and firing are sequentially performed, such that the sliding plate concurrently has excellent thermal shock resistance and anti-erosion property, carbon increasing in the liquid steel during the production process can be prevented, requirements of ultra-low carbon steel smelting and other special steel smelting are further met, and corresponding hardware conditions are provided for clean steel production.

Description

technical field [0001] The invention belongs to refractory materials for steelmaking, and relates to a carbon-free sliding plate and a preparation method thereof. Background technique [0002] The slide plate is the core component of the sliding nozzle device. It is used under harsh conditions and has very high requirements in terms of performance indicators, size and processing accuracy, and quality stability. [0003] The choice of skateboard material and the design of its composition are the most basic factors that affect the performance and use of skateboards. In order to improve the safety, reliability and usage times of skateboards, the material of skateboards has been optimized and developed since its application. [0004] The sliding boards used initially were high-temperature fired high-aluminum sliding boards or magnesium sliding boards combined with ceramics, and were impregnated with tar or pitch once or more times. The service life was not very high, mainly due...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 杨建华
Owner BAOSHAN IRON & STEEL CO LTD
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