— The physical and chemical properties of feldspar and quartz are highly similar, thus they cannot be easily separated effectively. In this work, the flotation separation of feldspar from quartz using sodium fluosilicate (Na2SiF6; SF) as a selective depressant was investigated. Moreover, the influence mechanism of SF on the selective flotation …
— Comparative experiments on the effect of the reagents on the flotation activity of fluorite, calcite, and quartz were carried out in an apparatus for nonfrothing flotation (an improved Hallimond tube). Monomineral fractions of fluorite, calcite, and quartz with a size of –0.125 + 0.02 mm were used.
— It is known that the flotation separation of fluorite/calcite is extremely difficult because of their similar surface features. In this research, the combination of FeSO 4 ·7H 2 O and Fe 2 (SO 4) 3 (FF) as depressant for possible flotation separation of calcite/fluorite was systematically investigated, with sodium oleate (NaOL) as collector. Besides large …
2. Flotation separation is mainly used to produce high-quality fluorite concentrate. The main problem of fluorite flotation is the separation of gangue minerals such as quartz, calcite and granite. According to the different gangue minerals, fluorite ore beneficiation can be divided into the following four types:
— The results of single mineral flotation tests indicated that DHH exhibited a stronger collecting ability to malachite and better selectivity against quartz and calcite than OHA, and floated out 94 % malachite, 8.5 % quartz and 17 % calcite at pH = 10 with a collector concentration of 60 mg/L.
Yao et al. [23], [24], [25] studied the flotation separation of fluorite, scheelite, and calcite by Pb 2+ and Na 2 SiO 3 as well as Zn 2+ and Na 2 SiO 3. They deduced that the metal silicate products generated by Pb 2+ and Zn 2+ with Na 2 SiO 3 adsorb on the surfaces of calcite and fluorite and delay the adsorption of NaOL. However, scheelite ...
— The effective flotation separation of fluorite and calcite is a critical problem in the mineral processing industry owing to their similar physicochemical characteristics. In this study, the effect of glucose (Glu) and Al 3+ on the flotation separation of fluorite and calcite was studied using micro-flotation experiments, scanning electron microscopy (SEM), …
— Depressant TE for the flotation separation of fluorite from calcite was attempted. • TE could selectively depress the calcite flotation using collector NaOl. • Flotation separation of fluorite and calcite could be achieved with the addition of TE. • TE weakly interacted with the fluorite while it was chemically adsorbed on the calcite ...
— The surface precipitation of calcium silicate or phosphate on fluorite and calcite was identified as a major depression mechanism. Selective depressing …
— Separation of these calcium-containing minerals from each other by means of flotation remains a problem, especially for separating scheelite from calcite and fluorite with fatty acid reagents. Because the adsorption mechanism of these collectors occurs through chemisorption of the oleate ion onto the mineral surface ( Changgen and Yongxin, 1983 ...
— Separating fluorite from quartz and calcite by forth flotation can be both in weak-acidized (pH 6.0) condition and weak alkali(pH 9.0) condition.
— The application of effective collectors in the flotation separation of fluorite and calcite has been widely reported. The comparison of different collectors on the flotation separation of fluorite and calcite is presented in Table 1.In conclusion, the separation of fluorite and calcite can be accomplished through various individual collectors and a …
— In this review, analyses of the fundamental reasons for the difficulties of flotation separation of fluorite from calcite are performed, from the similar surface properties of both calcium minerals to the …
Semantic Scholar extracted view of "The effect of citric acid in the flotation separation of bastnaesite from fluorite and calcite using mixed collectors" by Yanbo Xu et al. Skip to search ... Understanding the depression mechanism of citric acid in sodium oleate flotation of Ca2+-activated quartz: Experimental and DFT study. Yunfan Wang Sultan ...
— Fluorite ore, as an essential raw material in the fluorinated chemical industry, required effective separation and purification. The removal of impurities such as quartz becomes the key point in fluorite flotation.In this work, the fluorite flotation tests via adding the different mass ratios of metal ions (Fe 3+, Cu 2+, Al 3+) and sodium silicate (SS) as …
DOI: 10.1007/s11771-023-5282-z Corpus ID: 258336809; Flotation separation of fluorite from calcite by a new depressant curdlan and its mechanism @article{Han2023FlotationSO, title={Flotation separation of fluorite from calcite by a new depressant curdlan and its mechanism}, author={Wen-jie Han and Yi Min Zhu and Wenxu Ge and Jie Liu and …
— However, due to gangue minerals associated with fluorite, such as quartz, calcite, and barite, fluorite flotation remains challenging. Tremendous efforts have been made to overcome this problem, and the main processes are developing selective …
— Fluorite (CaF2), as an important strategic mineral source, is usually separated from calcite by the common froth flotation method, but this separation is still not selective enough. The development of a selective collector and/or depressant is the key to achieving high selective separation. 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP …
— The key technical problems of fluorite separation, such as flotation separation of fluorite and calcite, low temperature flotation reagents, and the influence of ions in pulp, were discussed. ... YUAN Q Z, et al. Experimental study on flotation of a low grade calcite-quartz-fluorite ore[J]. Non-Metallic Mines, 2018, 41: 70-72. Google Scholar ...
— The high purity of calcite and fluorite was derived from the Lianyungang and Sijiazhuang cities of China. The results of X-ray diffraction (XRD) (see Fig. 1) ensured that the purification of samples could satisfy the demand of experiments.The chemical composition analysis conducted by X-ray fluorescence showed that the fluorite sample …
— The effects of ultrasonic waves on the flotation of calcite, barite and quartz have been investigated in the case of single and mixed minerals.
— 2.2. Micro-flotation test. An advanced Hallimond tube was chosen in the micro-flotation experiments, and 2 g minerals (bastnaesite, calcite, quartz, bastnaesite-calcite or bastnaesite-quartz mixture with a mass ratio of 1:1) with the particle size distribution from 38 to 74 μm were used in each test following the reported procedure …
— The roles of calcite slimes on the quartz flotation using corn starch as the depressant and dodecylamine (DDA) as the collector were studied though micro-flotation tests, zeta potential measurements and DLVO theory calculations. ... This study provides guiding significance not only for the beneficiation of hematite but also for the fluorite in ...
— Compared with calcite, fluorite is insensitive to the concentration of the salted water glass, and the recovery of fluorite remains around 85%. The results show that the flotation separation of fluorite from calcite can be achieved at pH 11. Download: Download high-res image (265KB) Download: Download full-size image; Fig. 5.
— Finally, the most widely-seen fluorite-flotation cases, including separations of fluorite from quartz, calcite, barite, and sulfide, are summarized individually.
— The effect of NaOL/DDA with different molar ratios on the recovery of fluorite and calcite was studied, and the results are shown in Fig. 4 (a). As shown in Fig. 4 (a), the flotation recovery of fluorite and calcite has significantly different responses to the change in the composition of the mixed
— Semantic Scholar extracted view of "Efficient selective flotation separation of fluorite from calcite using ferrous and ferric species as combined depressant" by Junwei Huang et al. ... The combined application of Na2SiO3 and Mn2+ enhancing the flotation separation of quartz and kaolinite by NaOL. Ruizhe Wang Dandan Wu Qi Zuo Kuixain …
— This is an essay in the field of mineral processing engineering. In China, fluorite mainly exists in the form of concomitant deposits. In the flotation process, other useful minerals are usually preferentially floated, and a large amount of fluorite exists in tailings. In this paper, the restrained fluorite and calcite in the floating tungsten tailings …
— In this study, the flotation tests on fluorite, quartz and a weight equivalent mixture (all less than 10 μm) using water glass (with different modulus) as depressants and sodium oleate as collector were …
— Besides large gap between mono-mineral flotation results of fluorite and calcite, even for 1:1 mixed sample, CaF 2 grade of 80.29 % and CaF 2 recovery of 90.79 % of fluorite concentrate can be achieved with FeSO 4 ·7H 2 O (300 mg/L) and Fe 2 (SO 4) 3 (150 mg/L) used as combined depressant and NaOL (40 mg/L) as collector at pH = 6. In …
— A yeast, Saccharomyces cerevisiae, was effectively used for the separation of quartz from calcite through microbially induced flotation and selective flocculation. Yeast …
DOI: 10.1016/j.ces.2023.119608 Corpus ID: 265697228; Understanding the sequential flotation separation of fluorite, barite and calcite through the AFM adhesion force @article{Yu2023UnderstandingTS, title={Understanding the sequential flotation separation of fluorite, barite and calcite through the AFM adhesion force}, author={Jiang Yu and …
— The greatest difference of recovery between fluorite and calcite was achieved at pH 6.0, at which the recovery of fluorite and calcite was 98.79% and 13.73% respectively. Download : Download high-res image (145KB) Download : Download full-size image; Fig. 2. Effect of pH on the recovery of fluorite and calcite.
— Flotation is the most efficient method to recover this type of fluorite. Fluorite and calcite contain Ca 2+. During flotation, the physical and chemical properties of the …
— The flotation of sulphides and quartz from calcite is possible while using an amine collector at neutral or mildly alkaline pH values where the amines are present in mono and doubly charged ions. Optimum …
— As a common derive of fatty acid, sodium oleate (NaOl) is used in the flotation separation of quartz-fluorite and calcite-fluorite, given its unique advantages like low cost, readily available ...
— In reverse flotation, cationic collectors (amines) are preferred, but fatty acids can also be used, especially in systems where barite is present with fluorite, calcite and quartz. In addition to the collectors, barite flotation typically utilizes depressants like citric acid (CA), valonea extract, sodium fluosilicate, dextrin, SHMP, and ...
— 1. Quartz-Fluorite Ore Flotation Method. Quartz-fluorite type ore is mainly composed of fluorite (up to 85%) and quartz, with only a small amount of calcite, barite and sulfide. The key to its ...
— For fluorite-quartz or fluorite-sulfides type mineral deposits, the flotation separation of fluorite from associated minerals is relatively easily achieved by using fatty …
— Fluorite is the principal mineral of fluorine and usually coexists with quartz in deposits. The removal of fine quartz in fluorite concentrate is the main problem in fluorite flotation. In this study, the flotation tests on fluorite, quartz and a weight equivalent mixture (all less than 10 μm) using water glass (with different modulus) as depressants and …
