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Nano dolomite-containing corundum spinel castable

A technology of corundum spinel and nano-dolomite, which is applied in the field of inorganic non-metallic materials, can solve the problems of high cost and achieve the effects of low price, easy source and simple production process

Inactive Publication Date: 2012-12-05
山国强
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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 higher.

Method used

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  • Nano dolomite-containing corundum spinel castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The proportion of each component is (mass percentage) fused white corundum particles 63.0%, sintered calcium hexaaluminate powder 5%, fused aluminum magnesium spinel fine powder 10.0%, nano dolomite powder 4.0% , activated alumina micropowder 10.0%, pure calcium aluminate 8.0%, superplasticizer 0.3% (additional).

Embodiment 2

[0020] Example 2: The proportion of each component is (mass percentage): 67.0% of sintered tabular corundum particles, 5% of sintered calcium hexaaluminate powder, 15.0% of sintered aluminum-magnesium spinel fine powder, and 2.0% of nano-dolomite powder, Activated alumina powder 7.0%, pure calcium aluminate cement 4%, superplasticizer 0.2% (additional).

Embodiment 3

[0022] Example 3: The proportion of each component is (mass percentage): 70.0% of sintered tabular corundum particles, 10% of sintered calcium hexaaluminate powder, 10.0% of sintered aluminum-magnesium spinel fine powder, and 1.0% of nano-dolomite powder, Activated alumina micropowder 8.0%, pure calcium aluminate cement 1.0%, superplasticizer 0.1% (additional).

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Abstract

The invention relates to a nano dolomite-containing corundum spinel castable and a preparation method thereof. On the basis of a corundum spinel castable which is commonly used at present, nano dolomite powder is added, spinel and calcium hexa-aluminate serving as seed crystals are introduced, and a high-efficiency dispersing agent and an appropriate mixing process are adopted, so that the nano dolomite-containing corundum spinel castable is prepared. The adverse effect of hydration of magnesia on the construction performance of the castable when spinel is generated in situ by adding the magnesia is avoided, and the slag resistance and thermal shock resistance of the corundum spinel castable which is used at present are improved; and the prepared nano dolomite-containing corundum spinel castable can be widely applied to the field of high-temperature industry such as steel industry, nonferrous metal industry, ceramic industry and petrochemical industry, and also can be applied to a fireproof material product formed by casting, forming and sintering a permeable brick and the like.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials. In particular, it relates to a corundum spinel casting material containing nanometer dolomite. Background technique [0002] High-purity aluminum-magnesium-calcium castables are widely used in ladle linings, venting components and spray guns because the lowest eutectic point of the three elements is higher than the melting point of steel. After high temperature treatment, there are three high melting point mineral phases in this type of castable, namely calcium hexaaluminate (CA 6 ), aluminum-magnesium 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 hot strength of corundum magnesia castables...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 山国强
Owner 山国强
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