Mineral conversion of Zhundong coal during ashing process and the effect of mineral additives on its ash fusion characteristics

MA Yan; HUANG Zhen-yu; TANG Hui-ru; WANG Zhi-hua; ZHOU Jun-hu; CEN Ke-fa

Volume 42 Issue 01

Jan. 2014

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MA Yan, HUANG Zhen-yu, TANG Hui-ru, WANG Zhi-hua, ZHOU Jun-hu, CEN Ke-fa. Mineral conversion of Zhundong coal during ashing process and the effect of mineral additives on its ash fusion characteristics[J]. Journal of Fuel Chemistry and Technology, 2014, 42(01): 20-25.

Citation:

MA Yan, HUANG Zhen-yu, TANG Hui-ru, WANG Zhi-hua, ZHOU Jun-hu, CEN Ke-fa. Mineral conversion of Zhundong coal during ashing process and the effect of mineral additives on its ash fusion characteristics[J]. Journal of Fuel Chemistry and Technology, 2014, 42(01): 20-25.

Citation:

MA Yan, HUANG Zhen-yu, TANG Hui-ru, WANG Zhi-hua, ZHOU Jun-hu, CEN Ke-fa. Mineral conversion of Zhundong coal during ashing process and the effect of mineral additives on its ash fusion characteristics[J]. Journal of Fuel Chemistry and Technology, 2014, 42(01): 20-25.

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Mineral conversion of Zhundong coal during ashing process and the effect of mineral additives on its ash fusion characteristics

State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering of Zhejiang University, Hangzhou 310027, China

Received Date: 2013-06-20
Rev Recd Date: 2013-09-02
Publish Date: 2014-01-30

Abstract

Abstract

Mineral conversion in heating process was studied by low temperature ashing, high temperature ashing and XRD. The results show that the original minerals in Zhundong coal mainly include calcite and kaolinite. With the increase of combustion temperature, they transform into fusible minerals such as fayalite and calcium. In addition, refractory minerals, ettringite and grossular, generated in ash samples, result in higher ash melting points with the decrease in SiO₂/Al₂O₃ ratio which was adjusted by adding kaolinite and alumina into the raw coal.
- ash melting points,
- ash fusion characteristics,
- mineral additives,
- XRD

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