The dissolution behavior of scheelite in Na 2 CO 3, Na 2 SiO 3, and Na 2 CO 3 + Na 2 SiO 3 systems and its effect on scheelite flotation were studied by single mineral flotation tests, TOC, ICP, XPS, FBRM and microcalorimetry.The results show that the recovery of scheelite by flotation of Na 2 CO 3 as a regulator is best at low collector …
Flotation tests were performed on a skarn ore to attain the selective separation of scheelite (CaWO 4 ) from fluorite, apatite, and silicates.
In the flotation separation process of scheelite and cassiterite, GA altered the surface activity of cassiterite, causing its selective depression. Within the mineral slurry …
Owing to the depletion of wolframite, the focus of tungsten extraction has gradually shifted to scheelite. However, separating the associated minerals (e.g., apatite, fluorite, and calcite) and scheelite is challenging because their surface physicochemical properties are similar to those of scheelite. Fortunately, researchers have made …
Key words: scheelite; calcite; separation enhancement; sodium oleate; metal-inorganic complex depressant. 1 Introduction . Scheelite is rich in resources and has a low grade. It generally coexists with other calcareous gangue minerals [1]. The difficulty in the scheelite flotation is the separation of scheelite from calcium- bearing gangue ...
A series of flotation experiments were conducted in different scheelite and calcite mineral systems to assess POCA's impact on the flotation system. Fourier transform infrared spectroscopy (FTIR), zeta potential, X-ray photoelectron spectroscopy (XPS), among other techniques, were utilized to understand POCA's adsorption …
In this paper, using methyl cinnamate as raw material, the new cinnamic hydroxamic acid collector (CIHA) was synthesized by the hydroxylamine method. The collector performance of hydroxamic acid was investigated for scheelite and gangue calcite, and the flotation separation test of scheelite and calcite was carried out with CIHA as the collector.
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, …
This paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the interactions …
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.
The evolution of the scheelite flotation process has been predicated on the advancement of flotation reagents, which has resulted in the creation of the fatty acid flotation process, chelating collector flotation process, and metal–organic complex flotation process, all of which are integral to the three primary scheelite flotation …
In summary, a new type of Gemini quaternary ammonium salt collector (HDDA) was designed and synthesized. It was compared with conventional collector NaOL in the flotation process of scheelite and calcite. The collecting ability and selectivity of Gemini surfactant in the flotation of scheelite and calcite were found larger than those …
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 …
The flotation separation of scheelite, which is hindered by its interface similarity with calcium-containing minerals, remains a worldwide challenge. Achieving …
The scheelite surface (left) reacted weakly with Mn-SS, leading to more sodium oleate adsorbed on the scheelite, thereby increasing the hydrophobicity of the scheelite particles, which floated up, while the opposite occurred for calcite, achieving the flotation separation of the two minerals.
Numerous innovative flotation reagents have been introduced to improve the flotation separation efficiency between scheelite and calcium-bearing gangue minerals. Han et al. devised metal ion-organic coordinated complexes employed as collectors for the flotation separation of wolframite and scheelite from complex skarn polymetallic ore.
pH of the scheelite pulp and reacting with the reagents, thus influencing the expected flotation of scheelite flotation. (3) Mineral surfaces are difficult to separate because they have similar flotation behavior and identical active particles and crystal structures. 2. Inorganic depressants In the scheelite flotation process, depressants are ...
This paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the interactions between the flotation ...
The efficient separation of scheelite from calcium-bearing minerals, especially calcite, remains a challenge in practice.In this work, a novel reagent scheme incorporating a depressant of sodium hexametaphosphate (SHMP) and a collector mixture of octyl hydroxamic acid (HXMA-8) and sodium oleate (NaOl) was employed in both …
Effects of size distribution (particle size and content of fine fraction (<10 μm)) on scheelite flotation were studied using flotation tests and theor…
Generally, the content of scheelite in the ore body is very low, so it must be separated from fluorite and other gangue minerals and enriched to be a scheelite concentrate with a high grade before tungsten hydrometallurgy [2]. The traditional separation methods of scheelite from gangue minerals include gravity separation and …
This study investigated the adsorption of calcium and gypsum on scheelite and fluorite using micro-flotation, X-ray photoelectron spectroscopy, scanning electron microscope with energy-dispersive ...
In this article, the flotation separation of scheelite from calcite has been studied by flotation tests. The results show that benzohydroxamic acid has weak collecting ability to both scheelite and calcite. Lead ions can activate the flotation of scheelite and calcite, but the flotation separation of scheelite from calcite can't be realized.
ABSTRACT Flotation separation of scheelite from calcite is difficult because of the existence of the same cation in the minerals and similar physicochemical characteristics. Many studies have been performed to determine the selective depressants for calcite, but the separation of scheelite from calcite is still a big problem. In this …
The results of single mineral flotation and artificial mixed minerals flotation confirmed the success of flotation separation of scheelite and apatite. The FTIR and XPS analysis showed that the chelation action between the –COO– groups and the Ca on apatite surface was responsible for XG chelating adsorption.
Roughing Flotation of scheelite was carried out with R31 as collector,Na2CO3 as regulator and Na2SiO3 as depressant,the scheelite rough concentrate was then cleaned with water glass as depressant at 90-95℃.In lab test,a scheelite concentrate of 73.10% WO3 was obtained with a recovery of 81.67% from a run-of-mine containing 0.28% of WO3. The …
In this paper, the progress and prospects of scheelite flotation chemistry and its practice are summarized, encompassing various fields-such as crystal chemistry, …
This paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the …
Scheelite (CaWO4) is one of the prolific mineral sources of tungsten, and as with every other valuable mineral, scheelite is associated with gangue minerals such as calcite …
The CLE has potential application value in the flotation separation of scheelite and calcite. Key words: scheelite; calcite; flotation; camphor leaf extract; depressant 1 Introduction Scheelite (CaWO4) is one of the primary sources of tungsten used in the tool industry to produce hard and wear-resistant materials [1].
In this study, a polysaccharide, dextrin, was used as a green depressant for the flotation separation of scheelite from calcite. Micro-flotation experiments indicated that dextrin selectively depressed calcite at natural pH yet scheelite remained floatable using sodium oleate (NaOL) as a collector.
The flotation behaviors of scheelite, calcite and fluorite under different pulp pH with dextran sulfate sodium acting as depressant and sodium oleate acting as collector were studied through micro-flotation tests.
Request PDF | Selective flotation of scheelite from calcite and fluorite using a collector mixture | Collector 733, a sodium soap (C12–16COONa) is widely used industrially for scheelite flotation.
Flotation separation of scheelite from calcite remains a challenge because of the presence of Ca active sites on both mineral surfaces and of their similar physicochemical characteristics. In this study, the effect of Zn 2+ and its addition sequence on flotation separation of scheelite from calcite was investigated via micro-flotation …
This article aims at reviewing all general physical-chemical information on froth flotation of scheelite, including electrokinetic properties, influence of pH and …
Sodium alginate exhibits selective depressant effect on calcite and fluorite in scheelite flotation. Using sodium alginate as depressant and sodium oleate as collector can realize the preferential flotation separation of scheelite from …
A series of flotation experiments were conducted in different scheelite and calcite mineral systems to assess POCA's impact on the flotation system. Fourier transform infrared spectroscopy (FTIR), zeta potential, X-ray photoelectron spectroscopy (XPS), among other techniques, were utilized to understand POCA's adsorption mechanism on mineral ...
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