The flotation separation of scheelite, which is hindered by its interface similarity with calcium-containing minerals, remains a worldwide challenge. Achieving …

Finally, the deleterious effect of CIB grinding on the flotation behavior of scheelite is verified by the actual scheelite ore flotation experiments.

Flotation method: The flotation method is suitable for beneficiating fine-grained disseminated low-grade fluorite ore, and its concentrate is mainly used to …

This work introduces a feasible mineral processing method for the beneficiation of low grade and complex scheelite using the X-ray transmission (XRT) …

In scheelite flotation, gangue minerals such as Fluorite and Calcite have the same surface-active cation (Ca2+ ) with scheelite minerals and strong binding capacity with the fatty acid collectors. So the floatability of scheelite is close with that of Fluorite and Calcite and it is difficult to get good scheelite rough concentrate indexes. It is necessary to …

Flotation is the primary technique used to enrich scheelite. However, flotation separation of scheelite from calcium-bearing gangue minerals, such as calcite …

The "Sub-A" Flotation Machine produces a rougher concentrate which is usually recleaned once to produce a concentrate which will assay approximately 13 to 15% WO3. The flotation concentrate is tabled to remove a high grade concentrate. The table tailings can be shipped to an acid plant for production of synthetic scheelite.

The AWG was the appropriate depressant without imposing obvious adverse effects on scheelite flotation. In order to prove the validity of the findings, flotation of both mixed mineral (1:1 scheelite:calcite) and real ore were conducted as well as zeta potential measurements.

In this work, octyl hydroxamic acid (HXMA-8) was used as an associate collector with NaOl for scheelite flotation. A novel reagent scheme, i.e., 300 mg/L of SS depressant and 4.5 × 10 −4 mol/L of HXMA-8 + NaOl collector mixture (preferred mass ratio of 1:2) at pH 8–10, was proved to achieve the selective flotation separation of scheelite ...

The preparation of high-grade schleelite concentrates from calcite containing ores despite significant research progress remains an important commercial challenge. In this study, Fe (II) was selected as an assistant depressant and combined with sodium silicate (SS) to improve the flotation separation of scheelite from calcite.

The flotation separation of scheelite from other calcium-containing minerals such as fluorite and calcite, is problematic, due to their similar solubility and the same active Ca 2+ site for interaction with anionic collectors ( Rai et al., 2011 ). Thus, using a single type of collector is unlikely to achieve selective flotation of scheelite from fluorite and calcite.

In this study, effect of calcium and gypsum on scheelite and fluorite was investigated using sodium oleate as collector. Micro-flotation and contact angle results showed that the adsorption of calc...

Abstract. In this study, the innovative use of ethylenediamine tetramethylene phosphonic sodium (EDTMPS) as a calcite depressant in scheelite flotation was investigated by flotation experiments, and its selective depression mechanism was revealed by contact angle measurement, FTIR analysis, Zeta potential test and XPS …

A new coated-reactive reverse flotation method based on the generation of CO 2 bubbles at a calcite surface in acidic solution was used to separate calcite from scheelite. The dissolution kinetics of coated and uncoated calcite were studied in sulfuric acid. The CO 2 bubbles generated on the uncoated calcite particle surface are enough …

Scheelite, a strategic calcium-bearing mineral, usually coexists with calcite. Froth flotation is the most commonly used method of separating scheelite from calcite, but it is difficult to selectively separate them because of their similar Ca active sites.

Tungsten is an essential metal for the manufacture of special alloys, which is in constant demand due to the development of the industry. The recovery of scheelite from undeveloped tungsten ore in South Korea was investigated to improve the flotation performance for high grade and recovery of concentrate. To investigate the interaction …

An XFG type flotation machine equipped with a cell of 40 mL was used to conduct the flotation tests (Gao et al., 2016a). 2 g natural mineral powders with a size range from 37 to 74 μm and 35 mL ...

This study investigated an efficient method for removal COD of scheelite flotation wastewater (SFW) with polyferric sulfate (PFS) and the reuse of the treated water into the flotation system.

Semantic Scholar extracted view of "Synergistic effects between fatty acids and non-ionic reagents for the selective flotation of scheelite from a complex tungsten skarn ore" by Y. Foucaud et al.

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.

The flotation response variations of scheelite and calcite with collector concentration (at pH 7) are illustrated in Fig. 1 b. The recovery efficiency of scheelite increased with the concentration increase until the maximum value reached.

Pneumatic Flotation Machine (mining flotation machine) is suitable for large and medium-sized mineral beneficiation plants for roughing and cleaning flotation operations.

Due to their similar surface chemistry properties and solution chemistry properties and the same calcium ion active sites, in the process of flotation separation scheelite from calcium-containing gangue with traditional fatty acid collectors, their floatability is relatively similar, and it is difficult to separate by flotation [11], [12].

Flotation tests were performed on a skarn ore to attain the selective separation of scheelite (CaWO 4 ) from fluorite, apatite, and silicates. Fluorite and apatite constitute …

Effects of size distribution (particle size and content of fine fraction (<10 μm)) on scheelite flotation were studied using flotation tests and theoretical calculations. The results show that particle size influences the scheelite recovery and the performance of combined reagents.

This article aims at reviewing the research conducted on solubility and electrokinetic properties of scheelite as well as establishing a landscape of flotation …

In this study, the depressive effect and mechanism of baicalin (BAI), a flavonoid, in the flotation separation of scheelite and calcite was investigated. A series of surface analysis techniques were used to explain the selective depression mechanism of BAI on the calcite in flotation. The outcomes of the microflotation tests clearly ...

The depressing properties of sodium polyacrylate (PA-Na) for scheelite and fluorite were studied by micro-flotation tests, infrared spectroscopy (IR), zeta potentials, X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT). The flotation results reveal that the selective depression effect of PA-Na is better than that of sodium …

The development of scheelite flotation reagents in the future is envisioned, aiming at achieving efficient flotation enrichment of scheelite, reduce production costs …

NHOD's unique properties, such as characteristic bond patterns on scheelite surfaces, double hydrophobic groups, and intermolecular hydrogen bonds between neighboring molecules coated on scheelite surfaces, rendered it to be a superior collector for scheelite/calcite flotation separation.