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Silicon nitride combined castable for blast furnace skimmer and blast furnace skimmer

A slag skimmer and silicon nitride technology, applied in the field of refractory materials, can solve the problem of incomplete description of technical design structure scheme, formula combination advantages and raw material characteristics, unable to achieve creative and beneficial use effects, unfavorable to environmental protection and volatility Extremely strong and other problems, to achieve the effect of reducing comprehensive operating costs, significant economic and social benefits, and convenient and rapid floating

Active Publication Date: 2020-08-04
孙志红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It can be seen from the retrieval of the disclosed blast furnace skimmer data that there are many imperfections in the technical scheme adopted and the formula combination of raw materials and additives, and the description of the technical design structure scheme, formula combination advantages and raw material characteristics is not complete. Some of the materials used are not conducive to environmental protection and are highly volatile (asphalt, graphite, etc.), additives and binders, which cannot achieve their creative and beneficial use effects: therefore, we provide a formula with reasonable optimization and a simple and easy-to-implement preparation method , safe, environment-friendly, a new refractory product that can effectively reduce the overall operating cost of skimmers and improve the service life of skimmers for large and medium-sized blast furnaces, and has broad market promotion prospects and application value

Method used

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  • Silicon nitride combined castable for blast furnace skimmer and blast furnace skimmer
  • Silicon nitride combined castable for blast furnace skimmer and blast furnace skimmer
  • Silicon nitride combined castable for blast furnace skimmer and blast furnace skimmer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as Figure 1-7 As shown, a blast furnace slag skimmer includes a steel shell 1, a lightweight heat-insulating brick layer 2 is built inside the steel shell, a high-alumina silicon carbide brick layer 3 is built inside the light-weight heat-insulating brick layer, and a high-alumina silicon carbide brick layer The inner side of the layer is installed with a pouring work lining, and the upper end of the pouring work lining is processed with a molten iron groove 7, and the upper end of the molten iron groove is detachably installed with a pouring lintel, forming a molten iron channel 24 between the pouring lintel and the lower end of the molten iron groove, and the pouring work lining The upper end is located at the front side of the pouring lintel and is processed with a slag outlet 8. The pouring work lining includes a pouring bottom support 4, and a pouring wear-resistant block 5 is installed along the molten iron groove on the front side of the pouring bottom suppo...

Embodiment 2

[0064] Such as Figure 1-7 As shown, a blast furnace skimmer is different from other embodiments in that the silicon nitride bonded castable for the blast furnace skimmer is made of the following raw materials, fused dense corundum 35Kg, high-purity spinel 24Kg, black silicon carbide 23Kg, mullite hollow sphere 14Kg, silicon nitride micropowder 9Kg, sillimanite 10Kg, alumina micropowder 7Kg, cordierite 6Kg, aluminate cement 1Kg, ball clay 2Kg, explosion-proof fiber 0.3Kg , Dispersant 0.42Kg, test results see attached table 2.

Embodiment 3

[0066] Such as Figure 1-7 As shown, a blast furnace skimmer is different from other embodiments in that the silicon nitride bonded castable for the blast furnace skimmer is made of the following raw materials, fused dense corundum 45Kg, high-purity spinel 20Kg, black silicon carbide 15Kg, mullite hollow sphere 15Kg, silicon nitride micropowder 5Kg, sillimanite 5Kg, alumina micropowder 5Kg, cordierite 6Kg, aluminate cement 1Kg, ball clay 0.8Kg, anti-explosion fiber 0.3 Kg, dispersant 0.3Kg, test results see attached table 2.

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Abstract

The invention relates to the field of refractory materials, the invention relates to a castable, in particular to a silicon nitride combined castable for a blast furnace skimmer and the blast furnaceskimmer. The castable comprises a steel shell, a pouring working lining is arranged in the steel shell; a molten iron groove is formed in the upper end surface of the pouring working lining; a pouringlintel is detachably arranged at the upper end of the molten iron groove; a molten iron channel is formed between the pouring lintel and the lower end of the molten iron groove; a slag outlet is formed in the position, located on the front side of the pouring lintel, of the upper end of the pouring work lining, the pouring work lining comprises a pouring bottom support, a pouring abrasion-resistant block is arranged on the front side of the pouring bottom support along the molten iron groove, the pouring lintel and the slag outlet are both connected with the pouring abrasion-resistant block,the service life is prolonged, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a silicon nitride bonded castable for a blast furnace skimmer and a blast furnace skimmer. Background technique [0002] With the continuous improvement of ironmaking technology, the blast furnace is developing towards large scale. Under the condition of high temperature and high production, the skimmer is the key part of the separation channel of the blast furnace to discharge high-temperature slag and iron solution. The refractory material used for the skimmer is important for the safe and smooth operation of the blast furnace ironmaking Plays a very important role. The refractory material of the skimmer requires good erosion and erosion resistance under high temperature conditions and superior thermal shock resistance and wear resistance. [0003] Prior art: Al2O3-SiC-C low-cement castables are generally used for large and medium-sized blast furnace skimmers, and the oxidat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21B7/14
CPCC04B35/66C21B7/14C04B2235/3217C04B2235/3222C04B2235/3826C04B2235/3463C04B2235/3873C04B2235/3481C04B2235/349C04B2235/5212C04B2235/447Y02W30/50
Inventor 孙志红王玺堂孙艺欣贾全利聂建华焦顺杰孙毅伟孙依琳
Owner 孙志红
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