Study on the activation mechanism of lead ions in …
1995; Yang and Ai, 2016). The solvation free energy of iron and manganese ions on wolframite surfaces are much higher than that of the tungstate radicle ions. As such, preferential dissolution of the iron and manganese ions occurred in water, which resulted in negative charges on wolframite surfaces and thus preventing the collector ad-
Selective flotation separation of scheelite from apatite by …
Semantic Scholar extracted view of "Selective flotation separation of scheelite from apatite by application of ATMP as an efficient depressant" by Xun Wang et al.
Scheelite flotation: a new scheme using oleoyl sarcosine as …
Research and investigations into various approaches to improving the beneficiation efficiency of tungsten ores are reviewed in this paper, including selective flotation of scheelite from other calcium containing minerals such as calcite and fluorite using more selective reagents, very fine scheelite and wolframite flotation, …
Hydroxypropyl amine surfactant: A novel flotation collector …
Semantic Scholar extracted view of "Hydroxypropyl amine surfactant: A novel flotation collector for efficient separation of scheelite from calcite" by Liu Chang et al.
Research Progress with Scheelite Flotation Reagents: A Review
With the depletion of easily mined and separated wolframite, scheelite has become the primary source of tungsten. Flotation is the primary technique used to enrich scheelite. However, flotation separation of scheelite from calcium-bearing gangue minerals, such as calcite and fluorite, has always been challenging due to their similar …
Sustainable and Efficient Recovery of Tungsten from Wolframite …
The innovative technology of coleaching scheelite concentrates by a mixture of sulfuric acid and phosphoric acid is an environmentally friendly and low-cost technology. Although the world's first production line for continuous scheelite decomposition has been implemented in recent years, it remains difficult to digest …
(PDF) Beneficiation and Purification of Tungsten and …
The mutually reinforcing selectivity of PASP and Pb–BHA considerably contributes to the efficient flotation separation of scheelite from calcite. ... Binding energy analysis results indicated ...
Effects of surface electrical property and solution chemistry …
The activation of scheelite and wolframite by lead nitrate with benzohydroxamic acid (BHA) as collector was investigated by means of micro flotation test, zeta potential measurement, X-ray…
Flotation Mechanism of Wolframite with Varied Components Fe…
ABSTARCT. Wolframite is a series of minerals belonging to the isomorphic (Fe, Mn)WO 4 with varied Fe/Mn ratios, for which the floatability changes with its composition. In this work, the effects of composition on floatability were studied using micro flotation, collector adsorption tests, infrared spectroscopy, and X-ray photoelectron spectroscopy (XPS).
Froth flotation of scheelite – A review | Semantic Scholar
With the depletion of easily mined and separated wolframite, scheelite has become the primary source of tungsten. Flotation is the primary technique used to enrich scheelite.
Reuse of mine and ore washing wastewater in scheelite flotation …
Results demonstrated that reusing the MOW in scheelite flotation circuit can not only save freshwater and improve the quality of rougher flotation concentrate, but also minimise wastewater emission. In contrast to universal wastewater reuse and wastewater treatment approaches, the proposed method is environment friendly and sustainable …
Effects and Mechanisms of Grinding Media on the Flotation …
In this study, ceramic ball (CB) and cast iron ball (CIB), two representative grinding media, were chosen to investigate the effects and mechanisms of grinding media on the flotation behavior of scheelite. The results of pure scheelite flotation show that scheelite ground by CB has a better floatability than that ground by CIB.
Activation effect of lead ions on scheelite flotation: …
A recent study revealed that lead ions can be adsorbed onto the surfaces of scheelite and wolframite to enhance their flotation recovery using ... of relative contents of elements and the binding energy of scheelite surface elements, and there is no analysis of the chemical bonds types of related elements on the scheelite surface after the ...
Froth flotation of scheelite – A review
This article aims at reviewing all general physical-chemical information on froth flotation of scheelite, including electrokinetic properties, influence of pH and …
Flotation separation depressants for scheelite and calcium
Abstract. Owing to the depletion of wolframite, the focus of tungsten extraction has gradually shifted to scheelite. However, separating the associated …
A Highly Selective Reagent Scheme for Scheelite …
Previous studies have proved that the lead complexes of benzohydroxamic acid (Pb–BHA) are effective collectors of scheelite flotations; however, the separation of scheelite from calcite needs …
Flotation Mechanism of Wolframite with Varied Components Fe…
The results showed that wolframite with high Fe/Mn ratio showed higher flotation with BHA as a collector while the flotation behavior of wolframite was completely opposite with NaOl as a collector.
Investigation on the selectivity of N- ( (hydroxyamino)-alkyl
The binding-energy analysis was conducted to study the interaction sites between the collector and mineral surfaces. ... prospects in the flotation of scheelite, wolframite, cassiterite, ilmenite ...
Research Progress with Scheelite Flotation Reagents: A …
A systemic review on the study of scheelite flotation reagents and mechanisms of action for calcium-containing minerals and flotation reagents will supply …
A Highly Selective Reagent Scheme for Scheelite Flotation
In this study, we reported a novel depressant for calcite minerals, and Pb–BHA served as the collector of scheelite. The flotation behavior of polyaspartic acid …
Study on the role of a hydroxamic acid derivative in wolframite
Wolframite, as the main mineral for extracting tungsten, is usually separated and enriched by flotation in mineral processing, thus the construction of efficient flotation collector is of great ...
Study on the Activation of Scheelite and Wolframite by …
The activation of scheelite and wolframite by lead nitrate with benzohydroxamic acid (BHA) as collector was investigated by means of micro flotation test, zeta potential measurement, X-ray ...
Effect of Pb(II) on the flotation behavior of scheelite using …
The activation of scheelite and wolframite by lead nitrate with benzohydroxamic acid (BHA) as collector was investigated by means of micro flotation test, zeta potential measurement, X-ray…
Sustainable and efficient extracting of tin and tungsten from
Semantic Scholar extracted view of "Sustainable and efficient extracting of tin and tungsten from wolframite – scheelite mixed ore with high tin content" by Ren Huichuan et al.
Enhanced adsorption of citric acid at the calcite surface by …
The optimal Cu 2+ to CA ratios for scheelite and calcite flotation separation were 1:2 or 1:5. The recovery of scheelite exceeded 80%, while the recovery of calcite was less than 20% at this ratio. The microflotation experiment initially revealed the optimal experimental conditions for the flotation separation of scheelite from calcite.
Grade and recovery of scheelite, wolframite, and cassiterite …
Scheelite, wolframite, and cassiterite can be well collected in the roughing flotation with the recovery rate at 81.81%, 78.48%, and 68.86%. ... View in full-text Context 3
New insights into separating wolframite from calcium …
Highlights • A cationic surfactant DOPA was designed and first applied in wolframite flotation. • At low dosage, DOPA possessed excellent collecting ability to …
Leaching Systems of Wolframite and Scheelite: A …
Using these data with the known thermodynamic data, the equilibrium constants for reactions of leaching of scheelite and wolframite in acidic and basic media were determined. The results show that the acid route based in relatively cheap inorganic acids is desirable for scheelite digestion, despite the diffusion problems concerned with …
Leaching Behavior and Mechanism of Scheelite and Wolframite …
Acid leaching is considered an appropriate method for the tungsten concentrate treatment. However, it is difficult to leach wolframite efficiently. To reveal the origin of this behavior, the leaching behaviors of scheelite and wolframite in treating a mixed scheelite–wolframite concentrate by hydrochloric acid and the leaching …
Desorption and Reuse of Pb-BHA-NaOL Collector in Scheelite Flotation
Pb and BHA in Pb-BHA-NaOL collector assembled by lead nitrate (Pb), benzohydroxamic acid (BHA), and sodium oleate (NaOL) with a 240:120:1 molar ratio in scheelite flotation have the common defects of flotation reagents including high cost, environmental pollution and reducing hydrometallurgy efficiency. Therefore, in this study, …