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 …

Separating fluorite and calcite through flotation is difficult due to their similar Ca²⁺ sites on the adsorption surface of collectors. Psyllium seed gum, a reagent naturally derived from ...

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 ...

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 …

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 …

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 …

However, when used for fluorite flotation, it produces a number of problems that cannot be neglected, such as large reagent consumption, poor selectivity, high SiO 2 content and high water content of the fluorite concentrate. ... Flotation experiments indicated that GG exhibited strong depressing effect on the barite …

It has been well appreciated that the froth flotation is of the most importance. However, to the best of the authors' knowledge, it lacks a thorough and critical review on the recent developments in fluorite flotation. This article begins with introducing the deposits and unique physical and chemical properties of fluorite from the perspective ...

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 ...

DOI: 10.1016/j.molstruc.2024.137861 Corpus ID: 267961041; The mechanism of sodium silicate depressing fluorite in scheelite heating flotation @article{Xu2024TheMO, title={The mechanism of sodium silicate depressing fluorite in scheelite heating flotation}, author={Shitong Xu and Haiwei Huang and Baiqing Wang and Sili Ren}, …

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 …

The flotation of artificial mixed fluorite/calcite confirmed that TE had the efficient and selective depressing ability to achieve effective separation performance. The adsorption measurements showed that the adsorption amount of TE on the calcite surface was much higher than that on the fluorite surface.

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 …

Micro-flotation experiments indicated that SG could efficiently realise the flotation separation of fluorite from calcite. Laboratory-scale flotation tests showed that good beneficiation indices with CaF 2 grade of 76.15% and CaF 2 operating recovery of 96.23% of rough concentrates were obtained by adding 100 g/t SG at pH 9.

Request PDF | Investigation of two-stage depressing by using hydrophilic polymer to improve the process of fluorite flotation | Fluorite is a non-renewable mineral that is used for anhydrous ...

1-Hydroxyethylidene-1,1-diphosphonic acid used as pH-dependent switch to depress and activate fluorite flotation I: Depressing behavior and mechanism. Jianjun Wang Wenheng Li Zihan Zhou Zhiyong Gao Yue-hua Hu Wei Sun

To overcome the difficulty of separating bastnaesite from fluorite through the flotation technique, the present study examined the suitability of sodium alginate (SA) as a depressant in the flotation process. The effect of SA on the flotation separation of bastnaesite and fluorite was evaluated using micro-flotation tests, zeta potential …

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 …

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.

After curdlan was added, the flotation recovery of fluorite decreased slightly and remained above 80%. The calcite was strongly depressed and its flotation recovery decreased to less than 5%. The results showed that the flotability of fluorite and calcite was significantly different with the addition of curdlan.

In addition, both fluorite and bastnaesite belong to semi-soluble salt minerals, and the cations dissolved from mineral surfaces will not only complicate the flotation pulp environment but also unselectively adsorb on different minerals, causing problems for the flotation separation of bastnaesite and fluorite [10], [11], [12].

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.

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 …

In the pH range of 6–8, tannins inhibited calcite more than fluorite. Sodium humate has a strong depressant effect on calcite and little depressant effect on fluorite …

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 …

As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related chemical engineering. Since the major gangue minerals of fluorite ore are silicate and carbonate ones, flotation is the main …

The flotation results indicated that when sodium oleate (NaOL) was used as the collector, SHMP was 2.5 × 10 −6 M, showing an outstanding flotation separation of bastnaesite from fine fluorite. The contact angle and zeta potential results showed that SHMP selectively increased the surface hydrophobicity and decreased the surface …

The surface precipitation of calcium silicate or phosphate on fluorite and calcite was identified as a major depression mechanism. Selective depressing …

As the depressant of fluorite, a chemically pure PESA with a molecular weight between 400 and 1500 was provided by Shandong Yousuo Chemical Technology Co., Ltd., and its chemical structure was given in Fig. 2.The analytical-grade Octyl hydroxamic acid purchased from Shanghai Macklin Biochemical Co., Ltd. was employed …

In each flotation test, a total mass of 2 g of mixed minerals (at a mass ratio of 1:1 of bastnaesite and fluorite) was dispersed in 35 mL distilled water (Mlipore deionized, resistivity of 18.25 MΩ cm). Fig. 1 shows the flotation circuits of artificially mixed minerals. The pH of the suspension was modified by the addition of HCl or NaOH at 8.5.