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Super-micro powder composite impervious ceramic precast block for refining furnace and preparation method

A ceramic prefabricated block and superfine powder technology, which is applied in the field of prefabricated refractory materials, can solve the problems of increasing enterprise costs, energy consumption, and environmental pollution, and achieve the effects of reducing pollution and inclusions, strong wear resistance, and saving costs

Active Publication Date: 2012-07-11
REFRACTORY MATERIAL OF SINOSTEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the refractory materials currently used for refining furnaces all need high-temperature sintering, which not only increases the cost and energy consumption of the enterprise, but also causes environmental pollution

Method used

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  • Super-micro powder composite impervious ceramic precast block for refining furnace and preparation method
  • Super-micro powder composite impervious ceramic precast block for refining furnace and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation method of ultrafine powder composite anti-permeability ceramic prefabricated block for refining furnace, electro-fused aluminum-rich spinel (Al 2 O 3% content ≥ 90%) 70 parts, pre-synthesized spinel powder (electrically fused and sintered spinel single-or composite) 16 parts, alumina powder 8 parts; high-performance alumina water reducer 2 parts, pure 4 parts of calcium aluminate cement, plus 0.015 parts of the total weight of electro-fused pre-synthesized alumina-rich spinel, alumina micropowder, pre-synthesized spinel, high-performance alumina water reducer, and pure calcium aluminate cement coagulant The organic explosion-proof fiber is put into a strong sand mixer for pre-mixing for 13 minutes, and the mixed material is used for later use; the mixed material is added to 5% water, and the stirring is continued for 6 minutes to make the raw material into a concrete slurry; the vibration and decompression molding method is adopted That is - inject the prep...

Embodiment 2

[0028] Fused alumina-rich spinel (Al 2 o 3 % content ≥ 90%) 72 parts, pre-synthesized spinel powder (single or composite use of fused and sintered spinel) 15 parts, alumina powder 8 parts; high-performance alumina water reducer 2 parts, pure aluminum 3 parts of calcium aluminate cement, plus 0.013 parts of the total weight of electric fusion pre-synthesized aluminum-rich spinel, alumina micropowder, pre-synthesized spinel, high-performance alumina water reducer, and pure calcium aluminate cement coagulant Organic explosion-proof fiber, put it into a strong sand mixer for pre-mixing for 14 minutes, and the mixed material is ready for use; add the mixed material to 5.5% water, continue stirring for 5 minutes, and make the raw material into concrete slurry; adopt the vibration decompression molding method -Inject the prepared concrete slurry into the pre-assembled mold, perform high-frequency vibration and vacuum treatment to remove air bubbles; wet heat preservation and mainten...

Embodiment 3

[0030] Fused alumina-rich spinel (Al 2 o 3 % content ≥ 90%) 73 parts, pre-synthesized spinel powder (single or composite use of fused and sintered spinel) 17 parts, alumina powder 7 parts; high-performance alumina water reducer 1 part, pure aluminum 2 parts of calcium aluminate cement, plus electrofusion pre-synthesized aluminum-rich spinel, alumina micropowder, pre-synthesized spinel, high-performance alumina water reducer, pure calcium aluminate cement coagulant 0.014 of the total weight 100% organic explosion-proof fiber, put it into a strong sand mixer for pre-mixing for 13 minutes, and the mixed material is ready for use; add 6% water to the mixed material, continue stirring for 6 minutes, and make the raw material into concrete slurry; use vibration and decompression molding to form The method is - inject the prepared concrete slurry into the pre-assembled mold, perform high-frequency vibration and vacuum treatment to remove air bubbles; wet heat preservation and curing...

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Abstract

The invention discloses a super-micro powder composite impervious ceramic precast block for a refining furnace and a preparation method. The precast block does not require high-temperature sintering and is chromium-free, strong in corrosion resistance, good in thermal shock stability and abrasion resistance, excellent in slag penetration dissolution resistance and long in service life. Electrically melted pre-synthesized aluminum rich spinel and aluminum oxide micro powder are used as main materials; and the precast block is formed by adding the pre-synthesized spinel micro powder, combining the spinel micro powder and the aluminum oxide micro powder, adding high-performance aluminum oxide water reducing agent, trace pure calcium aluminate cement coagulant and organic explosion-proof fibers, moulding by casting and baking at a low temperature.

Description

technical field [0001] The invention relates to a prefabricated refractory material for a refining furnace. Specifically, it is an ultrafine powder composite anti-permeability ceramic prefabricated block and a preparation method thereof. Background technique [0002] Improving the comprehensive performance of steel materials and prolonging their service life is one of the main directions for the development of steel materials in the future, and adopting advanced clean steel smelting technology and continuously improving its technological level is an important way to achieve this goal; reasonable selection and correct use of high-quality High-quality refractories are an important guarantee for the realization of smelting clean steel smelting. [0003] Development history of RH refining function The working and mining conditions in the furnace are constantly harsh, and the progress of material technology has significantly improved the life of the furnace lining. However, in h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张利新薄钧段桂芳
Owner REFRACTORY MATERIAL OF SINOSTEEL CORP
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