High-purity corundum pouring material containing nano calcium carbonate and preparation method thereof

A technology of nano-calcium carbonate and nano-calcium carbonate powder is applied in the field of high-purity corundum castable and its preparation, which can solve the problems of low strength at medium temperature and difficult sintering, and achieve the effects of improved strength, fine particle size and good thermal shock resistance.

Inactive Publication Date: 2008-01-30
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to improve the disadvantages of low medium-temperature strength and difficult sintering of current corundum castables by utilizing the advantages of fine particle size of nano-calcium carbonate powd

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: The proportioning of each component is (mass percentage) 88.5% of fused white corundum, 8% of activated alumina micropowder, 2% of pure calcium aluminate cement, 1.5% of nano-calcium carbonate powder, and 0.2% of water reducer ( Plus).

Embodiment 2

[0029] Embodiment 2: The proportioning of each component is (mass percentage): 84% of sintered tabular corundum, 11% of activated alumina micropowder, 2% of hydrated alumina powder, 3% of nano-calcium carbonate powder, 0.1% of water reducer (additional ).

Embodiment 3

[0031] Embodiment 3: The proportioning of each component is (mass percentage) 44% of sintered tabular corundum, 40% of fused white corundum, 14% of activated alumina micropowder, 1% of hydrated alumina powder, 1% of nano calcium carbonate powder, Water reducer 0.3% (additional).

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PUM

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Abstract

The invention relates to a high pure corundum castable material containing nanometer calcium carbonate and a preparation method thereof. Based on the present commonly used corundum castable material, by adding nanometer calcium carbonate powder as well as adopting efficient dispersant and suitable mixing technology, the invention prepares corundum castable material that contains nanometer calcium carbonate. The invention solves the disadvantage of low strength of the present high pure corundum castable material in low and middle temperature, more particularly, the strength in about 800 DEG C. Furthermore, the variation of the burnt cool strength of the corundum castable material containing nanometer calcium carbonate from 800 DEG C to 1600 DEG C is comparatively small, and the cool strength and hot strength are both higher than those of the corundum castable material containing cement with the same content of CaO. The corundum castable material that contains nanometer calcium carbonate and is prepared by the utility model can be widely applied to such industries fields as iron and steel, nonferrous metals, ceramics and petrochemical etc. The invention can also be applied to fireproof materials products cast, molded and burnt by a porous brick etc., which can greatly reduce the burnt temperature and save energy.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials. Specifically relates to a high-purity corundum castable containing nano-calcium carbonate and a preparation method thereof. Background technique [0002] Compared with shaped refractory products, unshaped refractory materials, as a large category of refractory materials, have developed rapidly in all countries in the world because of their advantages in production, labor productivity, construction efficiency, material consumption, and energy saving. In recent years, due to the emergence of high-quality and high-performance raw materials, the introduction of ultrafine powder and high-efficiency dispersion technology, the adoption of new construction methods and the strengthening of basic research, etc., one of the main varieties of monolithic refractories has become one of the main varieties of castables in material, variety, Performance, construction and application have...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/10
Inventor 叶方保李志刚钟香崇张厚兴张宇
Owner ZHENGZHOU UNIV
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