A New Comprehensive Utilization Method for Coal Gangue: Preparing Alite-Sulphoaluminate Cement

Guan Li Xu; Chuan Min Sun; Yao Sun; Hai Liao

doi:10.4028/www.scientific.net/AMR.652-654.1527

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654A New Comprehensive Utilization Method for Coal...

A New Comprehensive Utilization Method for Coal Gangue: Preparing Alite-Sulphoaluminate Cement

Abstract:

Coal gangue is a kind of solid waste which is discharged from coal mining and coal washing. Dumped gangues do not only take a large land occupation but also pollute air and water. Treatment and utilizing of coal gangues has become the major issue for the coal industry to resolve. As major experimental material in this study, the coal gangue from Dawukou, Shizuishan, Ningxia province, China had been analyzed to have high-alumina content, and it could been used as alumina constituent for the preparation of sulphoaluminate cement. In this paper, alite-sulphoaluminate cements were prepared at 1330°C using coal gangue, limestone and gypsum as major main materials, fluorite and barite as minor materials. The result shows that major clinker minerals of the cement are sulphoaluminate, alite and belite, while major hydrate is ettringite, compressive strength of the cement is 48.9MPa after 7d. These experiments provide a new method of coal gangue comprehensive utilization.

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Periodical:

Advanced Materials Research (Volumes 652-654)

Pages:

1527-1532

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.1527

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Online since:

January 2013

Authors:

Guan Li Xu, Chuan Min Sun, Yao Sun, Hai Liao

Keywords:

Alite-Sulphoaluminate Cement, Coal Gangue, Comprehensive Utilization Method

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