Next Article in Journal
The Nature of Laponite: Pure Hectorite or a Mixture of Different Trioctahedral Phases?
Previous Article in Journal
Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous Media
Previous Article in Special Issue
Adsorption Mechanism of Pb2+ Activator for the Flotation of Rutile
Article Menu

Export Article

Open AccessCommunication
Minerals 2018, 8(8), 313; https://doi.org/10.3390/min8080313

Reverse Flotation Separation of Fluorite from Calcite: A Novel Reagent Scheme

1,2,†
,
1,2,†
,
1,2,3
,
1,2
,
1,2
and
1,2,*
1
Department of Minerals Engineering, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
2
Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China
3
Department of Chemical Engineering, College of Mines and Earth Sciences, Michigan Technological University, Houghton, MI 49931, USA
J.W. and Z.Z. contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 17 June 2018 / Revised: 12 July 2018 / Accepted: 22 July 2018 / Published: 26 July 2018
View Full-Text   |   Download PDF [905 KB, uploaded 26 July 2018]   |  

Abstract

Fluorite (CaF2), as an important strategic mineral source, is usually separated from calcite by the common froth flotation method, but this separation is still not selective enough. The development of a selective collector and/or depressant is the key to achieving high selective separation. 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP or H4L) is widely used as an environmentally friendly water treatment reagent due to its low cost and excellent anti-scaling performance in an aqueous solution. In this study, a novel reagent scheme was developed using HEDP as a fluorite depressant and sodium oleate (NaOL) as a calcite collector for the first time. When 3 × 10−5 mol/L of HEDP and 6 × 10−5 mol/L of NaOL were used at pH 6, the optimal selective separation for single minerals and mixed binary minerals was obtained. Zeta potential measurements indicated that HEDP possessed a stronger adsorption on fluorite than calcite, while NaOL did the opposite. This novel reagent scheme is of low cost, uses a small dosage, and is friendly to the environment, which makes it a promising reagent scheme for fluorite flotation in industrial application. View Full-Text
Keywords: fluorite; calcite; flotation; 1-hydroxyethylidene-1,1-diphosphonic acid; sodium oleate fluorite; calcite; flotation; 1-hydroxyethylidene-1,1-diphosphonic acid; sodium oleate
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Wang, J.; Zhou, Z.; Gao, Y.; Sun, W.; Hu, Y.; Gao, Z. Reverse Flotation Separation of Fluorite from Calcite: A Novel Reagent Scheme. Minerals 2018, 8, 313.

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.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top