Research on preparation and properties of porous ceramsites sintered with high-ash coal slime

• Autorzy: Zhu Dan , Min Fanfei , Lv Wenbao

Identyfikatory

DOI

10.37190/ppmp/172665

• Języki publikacji: EN

Abstrakty

EN

In order to realize the resource and harmless utilization of high-ash coal slime in coal preparation plants, porous ceramsites were prepared by the high-temperature sintering method with coal slime as raw material. The influences of sintering temperature, sintering time and ash content on the properties of porous ceramsites were studied by experiments, and the phase composition, micro-morphology and pore structure characteristics of ceramsites were analyzed by XRD, SEM and BET. The experimental results showed that with the increase of sintering temperature and sintering time, the amount of molten liquid in ceramsite green bodies increased, the densification degree of ceramsites increased gradually, the bulk density and the apparent density increased gradually, and the water absorption and the apparent porosity decreased gradually. However, with the increase of coal slime ash content, the quantity of pores within ceramsites increased first and then decreased. When the coal slime ash content was 55%, the bulk density of porous ceramsite sample was 0.549g/cm³, the water absorption rate was 64.63%, the specific surface area was 19.40m²/g, the crushing rate and wear rate were 0.14%, with rough surface, porous structure and excellent water absorption performance, which met the optimum performance requirements of porous ceramsites. At the same time, this research also provides a new idea and method for the reuse of high-ash coal slime resource, a by-product of coal washing and dressing.

Słowa kluczowe

EN

high-ash coal slime; porous ceramsites; sintering temperature; ash content

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2023
• Tom: Vol. 59, iss. 6
• Strony: art. no. 172665
• Opis fizyczny: Bibliogr. 40 poz., fot., tab., wykr.

Twórcy

autor

Zhu Dan

• Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

autor

Min Fanfei

• Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

autor

Lv Wenbao

• Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

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