Counterion effects on the alkali dissolution mechanism of quartz

• Autorzy: Yao Yu-yun , Tang Yun , Yang Yong , Li Guo-hui , Wu Bo , Dai Wen-zhi

Identyfikatory

DOI

10.37190/ppmp/160038

• Języki publikacji: EN

Abstrakty

EN

In gold ore, quartz plays an important role in mineral formation by acting as the follower. Understanding counterion release, transport, and deposition in alkali solution is a prerequisite for evaluating the potential role of gold separate from quartz deposits in pretreatment. In this work, the aggregation, retention, and release of counterion in alkali solution media were investigated by kinetic research and pure mineral experiments, the correlation and mechanism of these processes were revealed by combining geochemical theory, interaction energy calculation, and quantum chemistry. The results showed that the retention and release of counterion were closely related to the dissolution and corrosion rate of quartz. The NH₄⁺ and Fe²⁺ with higher mineral affinity reduced the quartz stability, and the dispersion stability and mobility of the quartz were greatly improved by an alkaline substance due to the enhancement of steric hindrance effects. Quantum chemical calculation results show that ammonium ion promotes the dissolution of quartz stronger than ferrous ion, which is mainly reflected in reducing the activation energy required for the formation of transition state (TS1), which can be verified by kinetic calculation. These findings provide essential insight into the extraction of gold coated by quartz as well as a vital reference for the experiment of gold-loaded quartz leaching in mineral processing.

Słowa kluczowe

EN

quartz; counterion; quantum chemistry; hydrolysis; mechanism

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2023
• Tom: Vol. 59, iss. 1
• Strony: art. no. 160038
• Opis fizyczny: Bibliogr. 34 poz., tab., wykr.

Twórcy

autor

Yao Yu-yun

• College of Mining, Guizhou University, Guiyang, China
• Mining Engineering and Geology College, Xinjiang Institute of Engineering, Urumqi, China

autor

Tang Yun

• College of Mining, Guizhou University, Guiyang, China
• Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, China

autor

Yang Yong

• College of Mining, Guizhou University, Guiyang, China
• Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, China

autor

Li Guo-hui

• College of Mining, Guizhou University, Guiyang, China

autor

Wu Bo

• College of Mining, Guizhou University, Guiyang, China

autor

Dai Wen-zhi

• College of Mining, Guizhou University, Guiyang, China
• Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources, Guiyang, China

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Uwagi

This work was supported by the National Natural Science Foundation of China (51864010) and the Plan Project of Science and Technology of Guizhou Province of China (Qiankehe Foundation [2017]1404, Qiankehe Platform Talents [2018]5781, Qiankehe JS [2011]2326 and Qiansheng Special Combination [2012]153.