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1. Introduction. Fluorite is an important strategic resource with the formula of CaF 2 which has been used in the field of fluorine chemical industry, optical lens, cosolvent in the smelting process as well as ceramics due to its special physicochemical properties [1], [2], [3].With the rapid depletion of high-quality fluorite ores, the exploitation of low …
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To overcome the difficulty of separating bastnaesite from fluorite through the flotation technique, the present study examined the suitability of sodium alginate (SA) …
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Tamarind seed gum (TSG), a neutral polysaccharide extracted from the endosperm of tamarind seeds, was used as depressant to separate fluorite and calcite for the first time. Micro-flotation experiment results revealed that TSG has great influence on the floatability of calcite at pH range of 6–11, the flotation recovery of calcite was only …
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The flotation results showed that the recovery of fluorite decreased by 89.71% when 4 mg/L PESA was added to the flotation system, while the bastnaesite recovery only exhibited a slight reduction ...
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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 …
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The agglomeration of bastnaesite and fine fluorite severely reduces the recovery of bastnaesite, and a method to address this issue is urgently needed. Using measurement techniques such as micro-flotation, contact angle, zeta potential, in situ attenuated total reflectance-Fourier transform infrared (In situ ATR-FTIR) spectroscopy, …
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The results of flotation experiments show that the reverse flotation separation of fluorite from calcite at pH 6.0 can be well achieved with the reagent scheme of 3 × 10 −5 mol/L HEDP and 6 × 10 −5 mol/L NaOL. Moreover, by adjusting the pH to 8.0, the fluorite flotation depressed at pH 6.0. Declaration of Competing Interest
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The commonly utilized flotation scheme in phosphate industry is reverse flotation using fatty acids in acidic media adjusted by H2SO4. The acidity of the flotation pulp results in presence of different ionic species that play a crucial role in modifying the minerals' surfaces. Therefore, the flotation of pure phosphate was investigated in …
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Flotation tests on fluorite ores with various carbonate content (CaCO 3 contents from 4.43% to 74.40%) were carried out using acidized sodium silicate (A.S.S.) as modifier and oleic acid as collector. A high purity fluorite concentrate (99% CaF 2 ) was obtained. It was demonstrated that A.S.S. has an activating effect on fluorite and a selective …
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It could be found that GM could strongly depressed the flotation of cassiterite but nearly affected the fluorite flotation, and an excellent separation effect (fluorite recovery of 97.43%, cassiterite recovery of 4.54%) could be obtained at the conditions of pH 8.00, GM dosage of 1.0 mg/L and SPA dosage of 80 mg/L.
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Cu 2+ was found to have intensive and selective depressing effects on fluorite in the flotation separation of cassiterite from fluorite using 2-carboxyethylphenylphosphinic acid (CEPPA) as a collector at pH 4.0. The depressing mechanism was investigated by flotation tests, zeta potential measurements, X-ray …
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It is followed by a systematic review of common reagents involved in fluorite flotation, including collectors, depressants, regulators, modifiers, and frothers. Specifically, the synergistic effect of collectors and depressants on the recovery of fluorite is …
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Depressants in fluorite flotation, which are used for decreasing the floatability of calcite and silica, mainly include some inorganic salts. Sodium silicate commonly known as water …
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Complex solution system can be difficult to deal with by conventional solution chemistry calculation. In order to avoid this problem and investigate the influence of sodium silicate on the flotation of scheelite from fluorite, Newton-Raphson method was applied to solution chemistry calculation. And a new kind of species distribution diagram was drawn in …
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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 common gangue ...
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The surface precipitation of calcium silicate or phosphate on fluorite and calcite was identified as a major depression mechanism. Selective depressing …
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DOI: 10.1016/j.ces.2019.115369 Corpus ID: 213265441; 1-Hydroxyethylidene-1,1-diphosphonic acid used as pH-dependent switch to depress and activate fluorite flotation I: Depressing behavior and mechanism
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The article presents experimental research into intensification of fine-disseminated carbonate-fluorite ore flotation by adding FLOTOL-7,9 agent. It is shown that the optimal agent modes allow the yield of the saleable fluorite product of above 90% CaF2 grade at higher than 60% fluorite extraction.
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In this study, two new collectors for fluorite flotation DP-OMC-1033 (DP-I) and DP-OMC-1234 (DP-II) were tested and compared with oleic acid (OA), sodium …
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It is hard to separate barite from fluorite due to their similar surface properties. In this work, to achieve the separation of barite from fluorite, 2-phosphatebutane-1, 2, 4-tricarboxylic acid (PBTCA) was used to depress fluorite, and the floatability, separation efficiency and mechanism were researched by micro-flotation …
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The floatability of fluorite and calcite as a function of NaOl dosage at pH 8.0 is shown in Fig. 4.As seen in Fig. 4, flotation recoveries of fluorite and calcite significantly increased with increasing dosage of NaOl and remained constant at high collector concentration.The flotation recovery of both fluorite and calcite was over 90 % using …
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The separation of rutile from apatite by flotation and the mechanism of depressing the apatite of sodium hexametaphosphate were studied. The results showed that rutile and apatite could be separated by using alkyl-mino-bismethylene phosphoric acid and sodium hexametaphosphate as a collector and a regulator, respectively. ... (H 2 PO …
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Conventional flotation practice for separating scheelite from fluorite utilizes sodium silicate (SS) (water glass) to depress fluorite followed by a fatty oil collector …
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Fluorite (CaF 2) and calcite (CaCO 3), both minerals containing calcium and owning similar surface properties, which is unfavorable to the selective separation.This study revealed the mechanisms of surface homogeneity transformation between them. Flotation results showed that F − ions increased the recovery of calcite, but CO 3 2− …
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DOI: 10.1016/J.MINENG.2019.106053 Corpus ID: 108593691; Replacing Petrov's process with atmospheric flotation using Pb-BHA complexes for separating scheelite from fluorite @article{Han2019ReplacingPP, title={Replacing Petrov's process with atmospheric flotation using Pb-BHA complexes for separating scheelite from fluorite}, author={Hai …
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The flotation separation of fluorite from calcite is realized when the adsorption amount on calcite surface is higher than that on fluorite surface (Tian et al., 2019a). Nevertheless, the depressive effect is greatly affected by the pH value ( Tian et al., 2019a ), with the excellent selective depressive effect only achieved in the pH range of ...
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Flotation experiments indicated that GG exhibited strong depressing effect on the barite flotation, whilst it showed little impact on the fluorite flotation. Zeta potential tests and surface wettability analyses demonstrated that GG intensely adhered onto barite and strongly prevented the subsequent NaOL adsorption, while it barely affected the ...
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The industrial tests were performed at Hunan Xinyuan Corporation's Fluorite Flotation Plant. In these tests, mud was removed early in the process by fluorite desliming rougher flotation. The old system used sodium silicate as a depressant during flotation. The flotation flowsheet of the industrial tests is described in Fig. 7. The new …
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Micro-flotation tests of the two minerals were studied to show the depressing effect of sulfonated lignite on fluorite and calcite. The mechanism of sulfonated lignite was investigated by Fourier transform infrared spectroscopy (FTIR) measurement, contact angle measurement and X-ray photoelectron spectroscopy (XPS) measurement.
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DOI: 10.1016/j.molliq.2020.114898 Corpus ID: 229445199; Depressing behaviors and mechanism of an eco-friendly depressant on flotation separation of cassiterite and fluorite @article{Lv2021DepressingBA, title={Depressing behaviors and mechanism of an eco-friendly depressant on flotation separation of cassiterite and fluorite}, author={Liang Lv …
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