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Process for preparing alumine based electric capacity zirconium corindon spinel

A zirconium corundum and spinel technology is applied in the field of preparing bauxite-based fused zirconium corundum spinel materials by melting and casting, which can solve problems such as undiscovered and achieve high added value.

Inactive Publication Date: 2005-06-08
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] By searching patents and literature, no method has been found to prepare fused zirconia corundum spinel synthetic materials using high alumina bauxite, light burnt magnesia and zircon sand as raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Raw material: high alumina bauxite: Al 2 o 3 89.65%, SiO 2 3.93%, TiO 2 4.12%, particle size 10mm-30mm; zircon sand: ZrO 2 Content 65.5%, particle size 0.1mm; light burnt magnesia: MgO content 95.3%, CaO 1.3%, SiO 2 1.0%, the particle size is 0.2mm; anthracite: fixed C is 75%? , ash content 10%, particle size 2mm; graphite block: fixed C is 80%, particle size 2mm; iron filings: Fe content is 76%, length 5-20mm.

[0019] Preparation:

[0020] Mix 100kg of high alumina bauxite, 7.0kg of anthracite and 8kg of iron filings evenly. Use this mixture to lay 20kg of furnace bottom, add 1kg of graphite block (particle size2 o 3 The content is greater than 98%. Observe the melting situation at this stage by dipping sticks;

[0021] Control the voltage of the electric arc furnace at 125V, mix 8kg of zircon sand and 1.2kg of coke particles evenly, and add the mixture to the above-mentioned corundum melt in batches for melting under submerged arc conditions to remove th...

Embodiment 2

[0026] Raw material: high alumina bauxite: Al 2 o 3 89.6 5%, SiO 2 7.90%, TiO 2 4.12%, particle size 20mm; graphite: fixed C is 80%, particle size 3mm; iron filings: Fe content is 80%, length 100mm? ; Zircon sand: ZrO 2 Content 67%, particle size 0.5mm; light burnt magnesia: MgO content 94.5%, CaO 0.5%, SiO 2 1.5%, the particle size is 0.6mm.

[0027] The preparation process is the same as in Example 1.

[0028] Replace 6 kg of coke particles with 5.5 kg of graphite particles.

[0029] In step a, the voltage is controlled at 100V, and the temperature is 2200°C; in step b, the voltage is controlled at 130V; in step c, the voltage is controlled at 130V, and the temperature is above 2400°C; in step d, the voltage and temperature are the same as in c, and refining is carried out for 50 minutes.

[0030] al 2 o 3

Embodiment 3

[0032] Raw material: high alumina bauxite: Al 2 o 3 85%, SiO 2 5.60%, TiO 2 3.12%, particle size 28mm; anthracite: fixed C is 85%? , ash content 15%, particle size 5mm; graphite block: fixed C is 85%, particle size 3mm; iron filings: Fe content is 85%, length 180mm; zircon sand: ZrO 2 Content 66%, particle size 1mm; light burnt magnesia: MgO content 96%, CaO 1.0%, SiO 2 1.5%, the particle size is 0.8mm.

[0033] The preparation process is the same as in Example 1.

[0034] Change the amount of light burnt magnesia from 7.2kg to 11kg.

[0035] In step a, the voltage is controlled at 110V, and the temperature is 2200°C; in step b, the voltage is controlled at 135V; in step c, the voltage is controlled at 135V, and the temperature is above 2450°C; in step d, the voltage and temperature are the same as in c, and refining is carried out for 60 minutes.

[0036] al 2 o 3

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Abstract

An alumine-based electro-zirconium-corundum spinel is prepared from natural high-Al alumine, light-bumt magnesium sand, zircon, coal or carbon, and iron filings through two-step reducing-smelting, two-step oxidizing-smelting, and refining. its advantages are high volume density and low porosity. It can be used for high-temp industry.

Description

[0001] Field [0002] The invention belongs to the technical field of manufacturing ceramic shaped products characterized by components, and in particular relates to a method for preparing alumina-based fused zirconium corundum spinel materials by melting and casting. Background technique [0003] With the development of continuous casting and refining technology outside the furnace, part of the refining process is transferred from the steelmaking furnace to the ladle. The ladle is not only a high-temperature container for storing molten steel, but also for refining molten steel in a vacuum, becoming a unique metallurgical equipment. Due to the increase of molten steel temperature, the prolongation of the residence time of molten steel in the ladle, coupled with the stirring action of the refining process and the erosion of slag, the service conditions of the ladle lining are deteriorated and the service life is reduced. At present, the ladle lining material is mainly corundu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/109C04B35/443C04B35/622C04B35/653
Inventor 钟香崇葛铁柱梁耀华叶方保赵法炎
Owner ZHENGZHOU UNIV
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