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Volume 10
Issue 3
10.3390/min10030291
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Article

New Combined Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism

by
Yunlou Qian
1,2,*,
Wei Ding
2,
Zhen Wang
2,* and
Yang Peng
2
1
Intelligent Safe Collaborative Innovation Center, Zhejiang College of Security Technology, Wenzhou 325016, China
2
Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China
*
Authors to whom correspondence should be addressed.
Minerals 2020, 10(3), 291; https://doi.org/10.3390/min10030291
Submission received: 28 February 2020 / Revised: 16 March 2020 / Accepted: 20 March 2020 / Published: 24 March 2020
(This article belongs to the Special Issue Interface Science in Mineral (Bio)Processing)
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Abstract

The flotation beneficiation of powellite from dolomite was achieved with a new reagent system that consists of a mixed collector of sodium oleate (NaOl) and benzohydroxamic acid (BHA) and a depressant sodium hexametaphosphate (SHMP). The interaction mechanism of the reagent regime with minerals was studied using zeta potential and X-ray photoelectron spectroscopy (XPS) detection together with crystal chemistry and interaction energy analysis. The matching features of O–O distance in BHA with that in saline minerals and active site density/activity were used as methods to explain the reagent/mineral interaction. The results of microflotation finally established the new reagent regime at pH 8–12: 2.5 × 10−4 M SHMP, 2 × 10−4 M mixed collector containing 1.5 × 10−4 M NaOl and 0.5 × 10−4 M BHA. SHMP selectively depresses the adsorption of NaOl and BHA onto dolomite but minimally affects the adsorption of NaOl and BHA on the powellite surface.
Keywords: powellite; selectivity; mixed collector; crystal chemistry; Ca-bearing mineral; flotation powellite; selectivity; mixed collector; crystal chemistry; Ca-bearing mineral; flotation
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MDPI and ACS Style

Qian, Y.; Ding, W.; Wang, Z.; Peng, Y. New Combined Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism. Minerals 2020, 10, 291. https://doi.org/10.3390/min10030291

AMA Style

Qian Y, Ding W, Wang Z, Peng Y. New Combined Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism. Minerals. 2020; 10(3):291. https://doi.org/10.3390/min10030291

Chicago/Turabian Style

Qian, Yunlou, Wei Ding, Zhen Wang, and Yang Peng. 2020. "New Combined Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism" Minerals 10, no. 3: 291. https://doi.org/10.3390/min10030291

APA Style

Qian, Y., Ding, W., Wang, Z., & Peng, Y. (2020). New Combined Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism. Minerals, 10(3), 291. https://doi.org/10.3390/min10030291

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