Separation of feldspar from quartz using EDTA as modifier

Shehu, N.; Spaziani, Elena

doi:10.1016/s0892-6875(99)00125-9

Cited by 15 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may be due to a partial dissolution of the feldspar surface as a result of HF pretreatment, which leads to an increased electrostatic adsorption of DDA at Al, Na, K sites. Vidyadhar et al [11][12][13] demonstrated that feldspar can be selectively floated from quartz at pH 2, where the doubly positively charged collector species was adsorbed on the feldspar surface but not on the quartz surface. The flotation recovery of feldspar and quartz at pH 2, as a function of concentrations of HF pretreatment and DDA, is shown in Figure 3.…”

Section: Micro-flotationmentioning

confidence: 99%

“…The second method is fluorine-free flotation, which could solve the problem caused by environmental pollution of HF flotation. Applying aliphatic amines and petroleum sulfonate mixing collector in strong acidic environment using H 2 SO 4 or HCl as pH regulator, selective flotation separation of feldspar from quartz [11][12][13] could be achieved. However, the effectiveness of this separation method is worse than conventional fluorine-containing flotation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment

et al. 2018

View full text Add to dashboard Cite

The effect of hydrofluoric acid (HF) pretreatment on flotation of feldspar and quartz using dodecylamine (DDA) as collector was investigated by micro-flotation, zeta potential, pyrene fluorescence spectroscopy, attenuated total reflection flourier transformed infrared spectroscopy (ATR-FTIR), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and bench scale flotation. The micro-flotation tests revealed that there was little difference in the flotation of feldspar and quartz at pH 2, using H 2 SO 4 as pH regulator. After HF pretreatment, the floatability of feldspar significantly increased while the floatability of quartz showed no change. HF pretreatment resulted in leaching of SiO 2 and enrichment of Na, K and Al on the feldspar surface. Consequently, the negative surface charge of feldspar increased at pH 2, which allowed for the flotation separation of the feasible minerals. This took place via an increased electrostatic adsorption between DDA and Na, K, Al on the feldspar surface, which effectively increased its hydrophobicity and as a result, improved the floatability of feldspar. An alternative process which exhibited effective separation of quartz and feldspar while recycling the tailwater from the flotation was proposed.

show abstract

Section: Micro-flotationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Because of possible environmental issues associated with the use of fluoride ions in the feldspar-quartz separation, there have been several attempts to find a non-fluoride process that is more environmentally acceptable. Shehu and Spaziani (1999) showed that the use of ethylenediaminetetracetic acid as a modifier could improve the efficiency of the separation of feldspar from quartz with a cationic collector.…”

Section: Fluoride Free Flotation Schemesmentioning

confidence: 99%

Review of flotation of feldspar

Heyes

Allan

Bruckard³

et al. 2012

Mineral Processing and Extractive Metallurgy

View full text Add to dashboard Cite

This paper reviews the application of flotation for the separation of feldspar from the other minerals with which it naturally occurs (such as quartz, clay minerals, mica, ilmenite, rutile, anatase and magnetite) as well as the separation of the individual feldspar minerals themselves. Much of the published information on feldspar flotation relates to fundamental studies seeking to elucidate the mechanism of the separation and recovery of feldspar with anionic or cationic collectors and activators. However, the separation schemes currently being used industrially are largely the same as those first proposed 60 years ago because the processes used are very efficient. The general circuit for commercial separation of feldspar consists of three sequential stages of flotation, all of which are carried out in an acid medium. Usually, before flotation, the feed is deslimed, removing any fine clay minerals present. In the first flotation stage, mica is removed with an amine collector. In the second stage, titanium and iron oxide minerals, such as ilmenite and magnetite, are removed using an anionic collector. In the third stage, feldspar is activated with fluoride ions and floated with an amine. The residual product is usually high grade quartz. This procedure results in feldspar products that meet market specifications, including low iron levels. Depending on the nature of the ore being treated and the particular contaminants it contains, one or more of these stages are used. A commercial feldspar product usually contains more than one feldspar mineral, and flotation conditions for the separation of individual feldspar minerals have been developed to produce individual feldspar minerals for specific applications. Potassium feldspar can be floated from sodium feldspar in a sodium chloride solution with an amine collector at neutral or acidic pH values. To overcome environmental issues when fluoride ions are used to activate the feldspar in the third flotation stage, fluoride free flotation conditions that utilise a combination of anionic and cationic collectors have been developed.

show abstract

“…In addition, the selectivity of flotation collectors was an essential prerequisite to achieve high quality concentrate and great recovery in the separation process. In the traditional flotation beneficiation process, single collectors, such as EDTA, diamine, sulfonate and oleate were adopted in the separation of quartz and feldspar (Shehu and Spaziani, 1999;Vidyadhar and Rao., 2007). Therefore, the use of mixed collector was a considerable progress in the separation of quartz and feldspar (Gaied and Gallala, 2015;Rao and Forssberg., 1997;Larsen et al, 2019;Kleiv, 2016, 2015;Zhang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Application of mixed collectors on quartz-feldspar by fluorine-free flotation separation and their interaction mechanism: A review

Li¹,

Ren²,

Xie³

et al. 2021

Physicochem. Probl. Miner. Process.

View full text Add to dashboard Cite

Quartz and feldspar are usually exist in symbiosis in nature, and they are difficult to be separated effectively by conventional physical methods owing to their similarities in crystal structures and surface characteristics. Flotation is the most resultful method, and especially, flotation with hydrofluoric acid (HF) is the most efficient way. Because HF may cause serious environmental and health problems, the effective and environmentally friendly separation of quartz and feldspar remains a formidable challenge. The crystal structure, surface broken bonds, surface energy, and solid-liquid interface properties of quartz and feldspar are investigated in this paper. In particular, some types of mixed cationic/anion collectors and their interaction mechanism on the quartz and feldspar surfaces with acidic, alkaline, and neutral media in the absence of fluorine are discussed, and the grade and scheme of quartz and feldspar for the practical application are illustrated. This review proposes concrete research approaches and provides perspectives for the advanced processing of quartz and feldspar in an environmentally friendly and economical way.

show abstract

Separation of feldspar from quartz using EDTA as modifier

Cited by 15 publications

References 1 publication

Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment

Developing Effective Separation of Feldspar and Quartz While Recycling Tailwater by HF Pretreatment

Review of flotation of feldspar

Application of mixed collectors on quartz-feldspar by fluorine-free flotation separation and their interaction mechanism: A review

Contact Info

Product

Resources

About