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Corundum-spinel pouring material containing nano-magnesium carbonate

A nano-magnesium carbonate and spinel technology, applied in the field of inorganic non-metallic materials, can solve the problem of high cost and achieve the effect of low price, high specific surface area and easy source

Active Publication Date: 2009-08-19
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported in the literature that the hydration resistance of MgO can be significantly improved by encapsulating MgO with organosilane, and then calcined at 350-500 °C, but the cost is obviously high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: The ratio of each component is (mass percentage): 72.0% of fused white corundum particles, 12.0% of sintered platy corundum fine powder, 5.0% of fused magnesia aluminum spinel fine powder, and 4.0% of nano-magnesium carbonate powder , activated alumina micropowder 5.0%, pure calcium aluminate cement SECAR712.0%, water reducer CASTMENT FS-100.3% (additional).

Embodiment 2

[0028] Example 2: The proportion of each component is (mass percentage): 63.0% of sintered tabular corundum particles, 12.0% of fused white corundum fine powder, 5.0% of fused magnesia aluminum spinel fine powder, sintered magnesia aluminum spinel fine powder Powder 3.0%, nano-magnesium carbonate powder 2.0%, activated alumina micro-powder 7.0%, pure calcium aluminate cement SECAR718%, water reducer CASTMENT FS-100.2% (additional).

Embodiment 3

[0030] Example 3: The proportion of each component is (mass percentage): 30.0% of sintered tabular corundum particles, 28.0% of fused white corundum particles, 8.0% of sintered tabular corundum fine powder, 4.0% of fused fused white corundum fine powder, sintered magnesium Aluminum spinel fine powder 15.0%, nano magnesium carbonate powder 1.0%, activated alumina fine powder 8.0%, pure calcium aluminate cement SECAR7 16.0%, water reducer CASTMENT FS-100.1% (additional).

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Abstract

The invention relates to a corundum-spinelle lithical concreting material containing nano magnesium carbonate and a preparation method. In the method, the corundum-spinelle lithical concreting material containing nano magnesium carbonate is prepared by taking the currently and commonly used corundum-spinelle lithical concreting material as the base, adding nano magnesium carbonate powder, and adopting high efficient dispersant and proper mixing technique. With the method adopted, not only the adverse impact of magnesium oxide hydration on the concreting material workability caused by adding magnesia to generate spinelle in situ is avoided, but also the dreg resistance and thermal shock resistance of the existing corundum-spinelle lithical concreting material are improved. The corundum-spinelle lithical concreting material containing nano magnesium carbonate prepared by the invention can be widely used in high temperature industries such as steel, nonferrous metal, ceramic, petrochemical and the like, and can also be used for refractory material products such as air bricks which are baked after concreting moulding.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials. Specifically, it relates to a corundum-spinel casting material containing nanometer magnesium carbonate. Background technique [0002] High-purity aluminum-magnesium castables include corundum-spinel and corundum-magnesia castables, which are widely used in ladle linings, venting elements and spray guns. After high temperature treatment or application, there are three high melting point mineral phases in this type of castable, namely calcium hexaaluminate (CA 6 ), magnesia-aluminum spinel and corundum, the three mineral phases form a good combination with each other, so that the castable has excellent slag resistance and thermal shock resistance, and is called the best matrix system. These materials have long been valued for their excellent properties. [0003] Compared with corundum-spinel castables, the corundum-magnesia castables that generate spinel by adding magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李志刚张振燕李红霞滕国强
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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