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Calcium aluminate cement bonded corundum castable containing calcium carbonate micropowder and preparation method of castable

A technology of calcium aluminate cement and castable, which is applied in the field of refractory materials to achieve the effects of improving thermal shock stability, low price and buffering thermal stress

Active Publication Date: 2014-06-04
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, CaCO has not been used in castables 3 Related reports on micropowder as an additive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A calcium aluminate cement bonded corundum castable containing calcium carbonate micropowder, said castable comprising aggregate and fine powder of platy corundum, activated alumina micropowder, calcium aluminate cement, CaCO 3 Micropowder and water reducing agent, among which, platy corundum aggregate, platy corundum fine powder, activated alumina micropowder, calcium aluminate cement, CaCO 3 The micropowder is 70%, 22%, 7%, 0.5% and 0.5% of the total weight of these five raw materials respectively; the water reducer is 0.2% of the total weight of the above five raw materials.

Embodiment 2

[0031] A calcium aluminate cement bonded corundum castable containing calcium carbonate micropowder, said castable comprising aggregate and fine powder of platy corundum, activated alumina micropowder, calcium aluminate cement, CaCO 3 Micropowder and water reducing agent, among which, platy corundum aggregate, platy corundum fine powder, activated alumina micropowder, calcium aluminate cement, CaCO 3 The micropowder is 70%, 21.5%, 7%, 0.5% and 1.0% of the total weight of these five raw materials respectively; the water reducer is 0.2% of the total weight of the above five raw materials.

Embodiment 3

[0033] A calcium aluminate cement bonded corundum castable containing calcium carbonate micropowder, said castable comprising aggregate and fine powder of platy corundum, activated alumina micropowder, calcium aluminate cement, CaCO 3 Micropowder and water reducing agent, among which, platy corundum aggregate, platy corundum fine powder, activated alumina micropowder, calcium aluminate cement, CaCO 3 The micropowder is 70%, 21%, 7%, 0.5% and 1.5% of the total weight of these five raw materials respectively; the water reducer is 0.2% of the total weight of the above five raw materials.

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Abstract

The invention discloses a calcium aluminate cement bonded corundum castable containing calcium carbonate micropowder. The castable comprises tabular corundum aggregate and fine powder, activated aluminium oxide micropowder, calcium aluminate cement, CaCO3 micropowder and a water reducing agent, wherein the tabular corundum aggregate and fine powder, the activated aluminium oxide micropowder, the calcium aluminate cement and the CaCO3 micropowder are 85-95%, 2-10%, 0.1-2% and 0.1-5% of the total weight of the tabular corundum aggregate and fine powder, the activated aluminium oxide micropowder, the calcium aluminate cement and the CaCO3 micropowder respectively, and the water reducing agent is 0.1-0.5% of the total weight of the four raw materials. The castable adopts the calcium carbonate micropowder as an additive, so that the cost is lower, and the thermal shock stability of the castable is improved greatly.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a calcium aluminate cement-bonded corundum castable containing calcium carbonate micropowder and a preparation method thereof. Background technique [0002] As a kind of amorphous refractory material, corundum castable has excellent high temperature performance, high strength, good volume stability, corrosion resistance, impact resistance, strong structural integrity, convenient construction and maintenance, and is widely used in metallurgy, building materials, petrochemical industry, etc. industry is widely used. Calcium aluminate cement is the main binder used in corundum castables. During the use of the corundum castable combined with calcium aluminate cement, when the temperature rises to a certain level, the hydration product of calcium aluminate cement will dehydrate and combine with the Al in the matrix. 2 o 3 In situ reaction of fine powder to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/101
Inventor 朱玲玲叶国田周颖王青峰傅安平
Owner ZHENGZHOU UNIV
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