Download: Download high-res image (166KB) Download: Download full-size image Figure shows the effect of Mn 2+ on the flotation of sodium silicate to separate scheelite and calcite. After adding sodium silicate, only a relatively small amount of sodium silicate interacts with and adsorbs Ca 2+ on the surface of scheelite, followed by the addition of MnCl 2, where Mn …
The flotation results showed that LS exerted high selectivity for hemimorphite, and flotation separation of hemimorphite from quartz was achieved at an LS concentration of 3.4 × 10 −4 mol/L and a pulp pH of 7. In contrast to sodium oleate (NaOL), LS exhibited a higher Gaudin's selectivity index (SI) of 67.58 under the optimal conditions ...
DOI: 10.1016/j.molliq.2021.117618 Corpus ID: 244183395; The depressing role of sodium alginate in the flotation of Ca2+-activated quartz using fatty acid collector @article{Wang2021TheDR, title={The depressing role of sodium alginate in the flotation of Ca2+-activated quartz using fatty acid collector}, author={Long Wang and Hanyu Gao and Shimin …
In this study, flotation experiments were carried out to investigate the flotation mechanism and improve the scheelite flotation performance of undeveloped tungsten ore from the Sangdong mine in South Korea. The …
In this study, the effect of Pb(NO 3) 2 on the flotation behavior of scheelite using sodium oleate (NaOL) as a collector in the presence and absence of Ca 2+ ions was investigated through the micro-flotation tests, solution chemistry calculation, zeta potential measurements, and FT-IR analysis. The micro-flotation results indicated that the addition of Pb(NO 3) 2 or Pb …
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 surface …
As is well-known, the presence of metal ions in slurry affects the flotation behavior of minerals. The Pb 2+ plays a regulatory (activation or inhibition) role in the flotation of sulfide and oxidized minerals, so it has been added to the process either as a flotation agent or as an unavoidable ion that interference with flotation. For example, Pb 2+ is usually added as an …
Semantic Scholar extracted view of "Exploring the separation mechanism of Gemini surfactant in scheelite froth flotation at low temperatures: surface characterization, DFT calculations and kinetic simulations" by Chenquan Ni et al. ... Reverse flotation separation of quartz from phosphorite ore at low temperatures by using an emerging Gemini ...
Scheelite particles are brittle and easily overground in the grind process [].As a result, there are always a large number of micro-granular slimes in the scheelite pulp, which weakens the flotation environment and leads to the loss of the valuable minerals [].Decreasing the size of flotation bubbles is regarded as an efficient way to recover the fine fractions [].
The optimum flotation pH for hematite and quartz was firstly determined. Flotation tests for hematite and quartz were carried out at a dodecylamine dosage of 30 mg/L without the addition of starch. Fig. 5 shows that the flotation recoveries of both minerals first increased and then decreased over pH.
Scheelite was collected by sodium oleate, and water glass served as the depressant for the gangue minerals (such as quartz, garnet, and part of the fluorite) in roughing flotation. Copious amounts of water glass (Na 2 SiO 3 ) were added for the separation of gangue minerals in the rougher concentration and resulted in a poor recovery of ...
In this study, in light of the poor selectivity of single copper ions (Cu 2+) and poor inhibition ability of citric acid (CA), the flotation separation effect of mixed depressant Cu 2+ /CA on scheelite and calcite was explored. The microflotation experiment showed that the mixed depressant had better separation effects on the two minerals than the single depressant, and …
The role of phosphate in inhibiting the activation of quartz flotation induced by Mg2+ J. Mol. Liq., 398 (2024), Article 124278. ... Reuse of mine and ore washing wastewater in scheelite flotation process to save freshwater: Lab to industrial scale. J. Water Process Eng., 53 (2023), Article 103674. View PDF View article View in Scopus Google ...
The fine scheelite flotation using garnet and glass beads as agitation medium was investigated through slurry rheology and froth property analysis. The apparent viscosity of fine scheelite, calcite and quartz (−20 μm) slurry were measured and the corresponding scheelite flotation behaviours, froth water recovery and froth height were studied.
Many studies have been conducted on its separation from quartz by flotation. Quartz is a common associated impurity in minerals. It has been widely studied due to its flotation. ... This demonstrates that the addition of Mn 2+ is favorable for the flotation separation of scheelite and calcite. Yao et al. [23], [24], [25] studied the flotation ...
The samples of scheelite, calcite and fluorite were all obtained from Xintianling mine, Hunan, China. Hand-selected crystals of these minerals were crushed to −1 mm by a laboratory roll crusher.The crushed products were then ground in a ceramic ball mill and dry-sieved to obtain the −74 + 38 μm-size fractions for micro-flotation tests.A portion of −38 μm …
The advantage of heating flotation is its good flotation effect, irrespective of whether it is quartz scheelite or scheelite-calcite-fluorite (barite) type scheelite, and the …
In the flotation separation process of scheelite and calcite, the mixed use of iron ions and depressant TA will improve the flotation separation efficiency of the two minerals. When the dosage of Fe 3+ and TA are 1.0 × 10 −4 mol/L and 5.0 × 10 −4 mol/L, the recovery of scheelite and calcite are 83.75% and 9.4% at pH 8, respectively.
DOI: 10.1016/J.JIEC.2015.09.027 Corpus ID: 97582717; Investigation on the selectivity of N-((hydroxyamino)-alkyl) alkylamide surfactants for scheelite/calcite flotation separation
DOI: 10.1080/08827508.2023.2270132 Corpus ID: 264466890; Exploring Dextrin as an Eco-Friendly Depressant for Selective Flotation Separation of Scheelite and Calcite Minerals @article{Yao2023ExploringDA, title={Exploring Dextrin as an Eco-Friendly Depressant for Selective Flotation Separation of Scheelite and Calcite Minerals}, author={Wei Yao and Yue …
Scheelite has similar properties to gangue minerals such as calcite, resulting in similar flotation reactions to conventional anionic collectors [11], [12], [13]. Fatty acids are the main collectors in use in flotation of scheelite, and its adsorption occurs on the cationic sites (Ca 2+) on the surface of calcium-bearing minerals. The ...
The apparent viscosity of fine scheelite, calcite and quartz (−20 μm) slurry were measured and the corresponding scheelite flotation behaviours, froth water recovery and froth height were studied.
The flotation results show that Ca 2+ significantly reduces the flotation recovery of scheelite using single dodecylamine (DDA) or single sodium oleate (NaOL), whereas Ca 2+ …
DOI: 10.1016/j.ijmst.2021.12.006 Corpus ID: 245578197; Insights into the influence of temperature on the adsorption behavior of sodium oleate and its response to flotation of quartz
The dominant gangue minerals are calcite, quartz and fluorite. Hand-picked pure scheelite and calcite from Huangpodi mine were crushed to −1 ... Fig. 7 shows the effect of pH on the flotation of scheelite and calcite using acidified sodium silicate as depressant. The single mineral flotation results indicated that the recovery of scheelite ...
After an objective assessment of inorganic and organic depressants' advantages and disadvantages, possible future research directions for inorganic and organic depressants …
Radar chart representing the selectivity indexes of SG [55], ASKG [41], FG [48 ... dolomite and quartz within phosphate ores, it could be easily concluded based on the flotation results of mixed ...
The flotation behavior of DPA was studied by micro-flotation and mixed binary mineral flotation tests, which showed that DPA has good collection ability and excellent selectivity for scheelite.
Introduction. As an important ore mineral of tungsten, scheelite CaWO 4 is commonly associated with other calcium-bearing minerals in mineral ore deposits, such as calcite CaCO 3, apatite Ca 10 (PO 4) 6 F 2 and fluorite CaF 2, from which it shall be separated by means of flotation as a result of the increasing need to process low-grade complex ores.It is well …
Scheelite CaWO 4, the most prominent mineral source for tungsten, often coexists with other calcium-containing minerals such as calcite (CaCO 3) and fluorite (CaF 2) [15], [16], [17]. The selective flotation separation of scheelite from calcite and fluorite is predominantly based on the difference in the surface properties of these minerals [15 ...
All the tested organic molecules exhibited similar behaviour (Fig. 1), which led to an efficient silicate depression and a moderate depression for apatite, fluorite, and scheelite; however, no selectivity was observed.The surface anions were probably involved in H-bond formation with the hydroxyl groups of the organic molecules, while the surface calcium atoms …
