Effects of particle size and particle interactions on scheelite flotation
Effects of size distribution (particle size and content of fine fraction (<10 μm)) on scheelite flotation were studied using flotation tests and theor…
Scheelite Scheelite Flotation Uganda
The combined effect of lead ion and sodium silicate in the flotation …
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 …
Research Progress with Scheelite Flotation Reagents: A Review
This paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the interactions …
Effect of calcium concentration on scheelite and fluorite flotation …
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 ...
Effect of grinding media on the surface property and flotation …
The selective flotation separation of scheelite from calcite and fluorite is predominantly based on the difference in the surface properties of these minerals [15], [18]. Therefore, research on the surface properties and flotation behavior of scheelite particles ground by different mills is of great significance for the selective separation. 2.
Flotation separation depressants for scheelite and …
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 ...
Exploring Dextrin as an Eco-Friendly Depressant for Selective Flotation …
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 combined effect of lead ion and sodium silicate in the flotation …
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.
(PDF) Scheelite flotation: a new scheme using oleoyl …
Early in 1994 scheelite flotation was studied (Ozcan et al., 1994) from a low grade calcitic scheelite ore using oleoyl sarcosine as collector and alkyl oxine as modifier in the laboratory and ...
The efficient utilization of low-grade scheelite with X-ray
Nowadays, with the depletion of high-grade scheelite resources, the efficient exploitation of complex, low grade with complicated geological structure scheelite ore have to take into account. This work introduces a feasible mineral processing method for the beneficiation of low grade and complex scheelite using the X-ray transmission …
Mechanistic analysis and validation of an efficient
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 ...
Collecting performance of vegetable oils in scheelite flotation …
The composition of a collector directly affects its collecting performance in mineral flotation. In this study, three vegetable oils were used as the collectors, the flotation performance of scheelite and the differential analysis were studied through flotation experiments, zeta potential, contact angle measurement and Fourier transform …
Effect of Zn2+ and its addition sequence on 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 …
Effects and Mechanisms of Grinding Media on the Flotation …
In this study, the effects and mechanisms of grinding media (CB and CIB) on the flotation behavior of scheelite were investigated through pure mineral flotation, …
Structure–activity relationship and mechanisms of …
Effects of carboxylic acid collector, benzohydroxamic acid (BHA), sodium hexametaphosphate (SHAP), sodium silicate, and oxalic acid on scheelite flotation were studied through flotation tests, quantum chemical calculation, and flotation solution computational chemistry. In terms of the calculation results, the relationship between …
The flotation separation of scheelite from calcite and …
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.
Enhanced electronic effect improves the collecting efficiency …
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 …
Desorption and Reuse of Pb-BHA-NaOL Collector in …
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 …
Exploring the separation mechanism of Gemini surfactant in scheelite …
In summary, this study used the Gemini collector HDDA for low-temperature flotation of scheelite and investigated its adsorption mechanism. The micro-flotation tests showed that HDDA possesses a better collection capacity than DDA for scheelite at both room temperature and low temperature.
(PDF) Effects and Mechanisms of Grinding Media on the …
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 …
Selective flotation of scheelite from calcite and fluorite …
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.
Camphor leaf extract as neoteric and environmentally …
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].
Mn-SS as a novel depressant of the flotation process of scheelite …
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.
(PDF) Flotation chemistry of scheelite and its practice: A
In this paper, the progress and prospects of scheelite flotation chemistry and its practice are summarized, encompassing various fields-such as crystal chemistry, …
Effect of Zn2+ and its addition sequence on 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.
Research Progress with Scheelite Flotation Reagents: A …
This paper reviews the scheelite flotation reagents, including collectors and regulators, and introduces recent research progress on the mechanisms for the …
Flotation separation of scheelite and apatite by …
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.
Flotation separation of scheelite from calcite using …
The flotation separation of scheelite from calcite is challenging due to their similar surface and solution chemistry properties, necessitating the use of efficient inhibitors.
Flotation Studies on Low-grade Scheelite with R_(31) as …
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 …
Flotation separation depressants for scheelite and calcium …
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 …
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