Analyzing the identification mechanism of graphite and clay minerale in coal and gangue using X-rays

• Autorzy: Yin Jianqiang , Zhu Hongzheng , Zhu Jinbo , Zeng Qiuyu , Li Liansheng , Yang Chenguang

Identyfikatory

DOI

10.37190/ppmp/143815

• Języki publikacji: EN

Abstrakty

EN

Three types of chelating depressants were studied for chalcopyrite/pyrite separation, including S-S, S-O, and O-O types, via density functional theory calculations and microflotation. The calculation results indicate that the depressant’s chelating atoms have large coefficient and great activity according to the molecular frontier orbital (HOMO and LUMO) and the orbital coefficients. For S-S type of depressant, S atom in both keto or enol forms won’t affect their HOMO and LUMO patterns and the orbital contributions. For S-O type, the presence of N atom in the ring structure of a molecular will increase the reactivity of O-Cu while weak S-Cu. For O-O type, the electron supply capacity of benzene ring is higher than strain chain, and atom N in strain chain increased their electron supply capacity. The microflotation results basically confirmed the prediction based on the calculation. The simulation results demonstrate that the interaction of a depressant with metals and minerals are affected obviously by the spatial structure and electronic structure of an atom in its molecular.

Słowa kluczowe

EN

X-rays; coal gangue identification; photoelectric separation; grayscale model; pixel volume

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2022
• Tom: Vol. 58, iss. 1
• Strony: 24--36
• Opis fizyczny: Bibliogr. 46 poz., rys. kolor.

Twórcy

autor

Yin Jianqiang

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

autor

Zhu Hongzheng

• School of Materials Science and Engineering, Anhui University of Science and Technology, 232001 Huainan, China
• State Key Laboratory of Ming Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, 232001 Huainan, China

autor

Zhu Jinbo

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

autor

Zeng Qiuyu

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

autor

Li Liansheng

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

autor

Yang Chenguang

• School of Mechanical and Automotive Engineering, Anhui Wenda University of Information Engineering, 231201 Hefei, China

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