Next Article in Journal
Nucleation and Initial Growth of Garnet in Low-Grade Metamorphic Rocks of the Sanbagawa Metamorphic Belt, Kanto Mountains, Japan
Next Article in Special Issue
Colloidal ZnCO3 as a Powerful Depressant of Arsenopyrite in Weakly Alkaline Pulp and the Interaction Mechanism
Previous Article in Journal
Processing of Waste Copper Converter Slag Using Organic Acids for Extraction of Copper, Nickel, and Cobalt
Previous Article in Special Issue
Novel Selective Depressant of Titanaugite and Implication for Ilmenite Flotation
Open AccessArticle

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
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)
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. View Full-Text
Keywords: powellite; selectivity; mixed collector; crystal chemistry; Ca-bearing mineral; flotation powellite; selectivity; mixed collector; crystal chemistry; Ca-bearing mineral; flotation
Show Figures

Graphical abstract

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.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop