Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder

Li Yonghui; Xian Yuanhua; Chen Dexia; Zhong Yi; Wu Xiujie

doi:10.3969/j.issn.1000-6532.2023.03.013

2023 No. 3

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Article navigation > Multipurpose Utilization of Mineral Resources > 2023 > 44(3): 78-81, 87

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Li Yonghui, Xian Yuanhua, Chen Dexia, Zhong Yi, Wu Xiujie. Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(3): 78-81, 87. doi: 10.3969/j.issn.1000-6532.2023.03.013

Citation:

Li Yonghui, Xian Yuanhua, Chen Dexia, Zhong Yi, Wu Xiujie. Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(3): 78-81, 87. doi: 10.3969/j.issn.1000-6532.2023.03.013

Process Optimization on Preparation of Composite Portland Cement with Low-grade Pyrite Cinder

1.
Yibin Vocational & Technical College, Yibin, Sichuan, China
2.
Sichuan Province Key Laboratory of Higher Education Institutions for Comprehensive Development and Utilization of Industrial Solid Waste in Civil Engineering, Panzhihua, Sichuan, China
3.
Chongqing Economy and Trade Secondary Vocational School, Chongqing, China

Received Date: 21 March 2021

Publish Date: 25 June 2023

Abstract

Abstract

This is a paper in the field of mineral materials. In order to seek for a new feasible way to utilize low-grade pyrite cinder under local conditions, to solve bottleneck problems of large reserves, and to relieve soil and water pollution, a research on the process optimization on preparation of composite portland cement with low-grade pyrite cinder was conducted. Pyrite cinder as a special kind of industrial solid waste with higher iron content, was used as additive, and was incorporated with portland cement clinker, flue gas desulfurization gypsum and fly ash to prepare composite portland cement. Their efficacy was compared by testing the compressive strength and flexural strength of composite portland cement, based on the analysis of physical indices, and then orthogonal tests were carried out to optimize the preparation. The results showed that the optimum preparation conditions were: mass fraction of portland cement clinker of 55%, Ca to Si ratio of 2.5, fly ash to pyrite cinder ratio of 1.0, and water to material ratio of 0.4. And then, 28-day compressive strength was 43.9 MPa. According to the national standard named as Common Portland Cement, the cement mark can reach the level of P·C 42.5.
- Pyrite cinder /
- Composite portland cement /
- Recycling of solid wastes /
- Orthogonal test /
- Synergistic utilization of waste slag /
- Mineral materials

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References

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