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Granular composition containing anhydrite III based hydraulic binder and aluminum oxide based granular material

A composition, anhydrite technology, applied in dry granular composition, granular composition, production of refractory material, production of this granular composition field, can solve the problem of high roasting temperature and time, high energy consumption, granular composition production complex issues

Inactive Publication Date: 2008-08-20
GYPSMIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the production of these granular compositions is complicated and consumes a large amount of energy, and the temperature and time of roasting are relatively high
[0013] Furthermore, since bauxite is a rare and expensive mineral, the industrial exploitation of this type of cement is less economical

Method used

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  • Granular composition containing anhydrite III based hydraulic binder and aluminum oxide based granular material
  • Granular composition containing anhydrite III based hydraulic binder and aluminum oxide based granular material

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Embodiment Construction

[0040] The hydraulic binder is mainly used to ensure the cohesion between the alumina particulate materials in order to provide optimum mechanical strength to the refractory material of the present invention.

[0041] Anhydrite III based hydraulic binders are well known to those skilled in the art. Formula (CaSO 4 , 2H 2 O) Strong dehydration (220°C-360°C) of natural calcium sulfate (gypse) or synthetic calcium sulfate (sulfogypsum, phosphogypsum, borogypsum, titanium gypsum, etc.) leads to the formation of the formula (CaSO 4 ,εH2 O) Anhydrite III in which ε is 0.1-0.2. Stronger dehydration (>360°C) leads to the formation of formula (CaSO 4 , 0H 2 O) Anhydrite II.

[0042] Anhydrite III is strongly hygroscopic and rapidly rehydrates to the formula (CaSO 4 , 1 / 2 h 2 O) hemihydrate or conventional beta gypsum, and then revert to the state of calcium sulfate depending on the atmospheric humidity.

[0043] A process for the preparation of stabilized anhydrite III is k...

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Abstract

The present invention relates to a granular composition intended to react with water for forming a refractory material, characterized in that it comprises anhydrite III based hydraulic binder and alumina based particulate material. The object of the present invention is to produce cold-worked refractory materials which do not require firing before application, said materials having very good refractory and mechanical properties at high (>1000°C) and very high (>1600°C) temperatures.

Description

technical field [0001] The present invention relates to a granular composition comprising anhydrite III based hydraulic binder and alumina based granulat. [0002] The invention also relates to the use of such granular compositions for the production of refractory materials. [0003] The invention also relates to different methods of producing such granular compositions. [0004] The present invention relates to the general technical field of cement, and in particular to a dry granular composition consisting of a hydraulic binder and a granular material and intended to react with water to form a concrete-type material. [0005] The invention relates more particularly to the technical field of the use of such granular compositions for the production of cold-worked refractory materials which are not fired prior to application. Background technique [0006] Refractories are materials that can withstand high temperatures (>1000°C) while maintaining dimensional and functiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/16
CPCC04B28/16C04B2103/0067C04B7/32C04B14/104C04B14/18C04B14/202C04B14/26C04B14/303C04B18/025C04B41/5081
Inventor E·迪穆兰
Owner GYPSMIX