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| Practice of Producing Low Alkali Cement with Coal Gangue and Mine Stripping Clay |
| Minhe Qilianshan Cement Co., Ltd. |
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Abstract The chemical composition of coal gangue and clay stripped from mine was analyzed. The coal gangue and clay stripped from mine were used as silica-alumina correction materials for raw meal proportioning and burnability test, and the proportioning scheme for producing low alkali cement was determined. The alkali content of clinker produced is stable at about 0.4%, the alkali content of low-alkali cement produced is stable at about 0.5%, and the addition amount of cement mixture is increased to about 16%, which not only utilizes waste residue, but also solves the problem of stacking stripped clay in mines.
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Received: 11 July 2020
Published: 04 February 2021
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