Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass

As a common depressant, acidified water glass (AWG) has strong inhibitory effects on fluorite and calcite. The inhibited fluorite is difficult to be recovered, thus resulting in the waste of resources and low flotation efficiency. In this study, the interaction of fluoride ions with fluorite and cal...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Daqian Wang, Dan Liu, Yingbo Mao, Ruofan Sun, Ruitao Liu, Shuming Wen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	fluorite calcite fluoride ion surface modification flotation Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/fc20cfb6db0d436e81991fd2276e0549
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:fc20cfb6db0d436e81991fd2276e0549
record_format	dspace
spelling	oai:doaj.org-article:fc20cfb6db0d436e81991fd2276e05492021-11-25T18:26:13ZEffect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass10.3390/min111112032075-163Xhttps://doaj.org/article/fc20cfb6db0d436e81991fd2276e05492021-10-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1203https://doaj.org/toc/2075-163XAs a common depressant, acidified water glass (AWG) has strong inhibitory effects on fluorite and calcite. The inhibited fluorite is difficult to be recovered, thus resulting in the waste of resources and low flotation efficiency. In this study, the interaction of fluoride ions with fluorite and calcite surfaces was investigated, and its effects of AWG adsorption on mineral surfaces were evaluated. Micro-flotation experiments indicated that the flotation recovery of fluorite is 88.72% after fluoride ion treatment, that is, approximately fourfold with respect to that without fluoride ion modification. The results of solution chemical calculations showed that SiO(OH)<sub>3</sub><sup>−</sup> is the main component to inhibit fluorite, and Si(OH)<sub>4</sub> is the main component to inhibit calcite in AWG solution. XPS and ICP-MS results showed that fluoride ions can improve the floatability of fluorite by converting CaSiO<sub>3</sub> on the surface of fluorite into CaF<sub>2</sub>, but the conversion ability of Si(OH)<sub>4</sub> on the surface of calcite is weak, which increases the difference in floatability between fluorite and calcite. The above results were further verified by the analysis of flotation foam image and contact angle measurement. After fluorine ion treatment, the contact angle of fluorite increased, and it was more easily adsorbed on the foam. Therefore, the interaction of the fluoride ion with the fluorite surfaces eliminated the adsorption of AWG on fluorite, thereby resulting in the enhanced hydrophobicity of fluorite. Different from the traditional metal ions modification, the idea of anion modification in this paper is expected to be further studied.Daqian WangDan LiuYingbo MaoRuofan SunRuitao LiuShuming WenMDPI AGarticlefluoritecalcitefluoride ionsurface modificationflotationMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1203, p 1203 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fluorite calcite fluoride ion surface modification flotation Mineralogy QE351-399.2
spellingShingle	fluorite calcite fluoride ion surface modification flotation Mineralogy QE351-399.2 Daqian Wang Dan Liu Yingbo Mao Ruofan Sun Ruitao Liu Shuming Wen Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass
description	As a common depressant, acidified water glass (AWG) has strong inhibitory effects on fluorite and calcite. The inhibited fluorite is difficult to be recovered, thus resulting in the waste of resources and low flotation efficiency. In this study, the interaction of fluoride ions with fluorite and calcite surfaces was investigated, and its effects of AWG adsorption on mineral surfaces were evaluated. Micro-flotation experiments indicated that the flotation recovery of fluorite is 88.72% after fluoride ion treatment, that is, approximately fourfold with respect to that without fluoride ion modification. The results of solution chemical calculations showed that SiO(OH)<sub>3</sub><sup>−</sup> is the main component to inhibit fluorite, and Si(OH)<sub>4</sub> is the main component to inhibit calcite in AWG solution. XPS and ICP-MS results showed that fluoride ions can improve the floatability of fluorite by converting CaSiO<sub>3</sub> on the surface of fluorite into CaF<sub>2</sub>, but the conversion ability of Si(OH)<sub>4</sub> on the surface of calcite is weak, which increases the difference in floatability between fluorite and calcite. The above results were further verified by the analysis of flotation foam image and contact angle measurement. After fluorine ion treatment, the contact angle of fluorite increased, and it was more easily adsorbed on the foam. Therefore, the interaction of the fluoride ion with the fluorite surfaces eliminated the adsorption of AWG on fluorite, thereby resulting in the enhanced hydrophobicity of fluorite. Different from the traditional metal ions modification, the idea of anion modification in this paper is expected to be further studied.
format	article
author	Daqian Wang Dan Liu Yingbo Mao Ruofan Sun Ruitao Liu Shuming Wen
author_facet	Daqian Wang Dan Liu Yingbo Mao Ruofan Sun Ruitao Liu Shuming Wen
author_sort	Daqian Wang
title	Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass
title_short	Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass
title_full	Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass
title_fullStr	Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass
title_full_unstemmed	Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass
title_sort	effect of fluoride ion on the separation of fluorite from calcite using flotation with acidified water glass
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/fc20cfb6db0d436e81991fd2276e0549
work_keys_str_mv	AT daqianwang effectoffluorideionontheseparationoffluoritefromcalciteusingflotationwithacidifiedwaterglass AT danliu effectoffluorideionontheseparationoffluoritefromcalciteusingflotationwithacidifiedwaterglass AT yingbomao effectoffluorideionontheseparationoffluoritefromcalciteusingflotationwithacidifiedwaterglass AT ruofansun effectoffluorideionontheseparationoffluoritefromcalciteusingflotationwithacidifiedwaterglass AT ruitaoliu effectoffluorideionontheseparationoffluoritefromcalciteusingflotationwithacidifiedwaterglass AT shumingwen effectoffluorideionontheseparationoffluoritefromcalciteusingflotationwithacidifiedwaterglass
_version_	1718411174510329856

Effect of Fluoride Ion on the Separation of Fluorite from Calcite Using Flotation with Acidified Water Glass

Ejemplares similares