Effect of acid surface dissolution pretreatment on the selective flotation of ilmenite from olivine and pyroxene

Parapari, Parisa Semsari; Irannajad, Mehdi; Mehdilo, Akbar

doi:10.1016/j.minpro.2017.07.017

Cited by 49 publications

(4 citation statements)

References 33 publications

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“…According to a published work, pyroxene can be decomposed under acidic conditions. 26 Regarding diopside, its acid solubility is weak, but its structure can be destroyed by ball milling, thereby increasing its decomposition rate. 27 Fig.…”

Section: E-ph Diagram Of the Main Components In Ti-bearing Blast Furn...mentioning

confidence: 99%

Thermodynamics analysis and experiments on Ti-bearing blast furnace slag leaching enhanced by sulfuric acid roasting

et al. 2022

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Section: E-ph Diagram Of the Main Components In Ti-bearing Blast Furn...mentioning

confidence: 99%

Thermodynamics analysis and experiments on Ti-bearing blast furnace slag leaching enhanced by sulfuric acid roasting

et al. 2022

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“…= P CO 2 K 3 = 10 −4.97 . According to the reaction Formulas (5) to (7) and the reaction Formulas (12) to (17), the logarithmic of the concentration of other components in the saturated solution of calcite can be calculated as follows:…”

Section: Reactionsmentioning

confidence: 99%

“…Foam flotation is an efficient method to recover minerals with low grade and fine grain size [7][8][9]. During the flotation process, the chemical properties of the mineral surface (such as wettability and surface electrical properties) are changed by adding flotation reagents [10][11][12][13]. Similarly, scheelite and calcite have similar chemical compositions and chemical interactions with corresponding flotation reagents, which makes the separation of scheelite and calcium-containing minerals different [14].…”

Section: Introductionmentioning

confidence: 99%

Use of Sodium Hexametaphosphate and Citric Acid Mixture as Depressant in the Flotation Separation of Scheelite from Calcite

et al. 2019

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The floatability of scheelite and calcite in the presence of single depressant (SHMP or H 3 Cit) and mixed depressant (SHMP/H 3 Cit) was studied by microflotation experiments and artificial mixed mineral experiments. Solution chemical calculation, zeta potential tests, thermodynamic analysis and XPS analysis were used to explain the relevant depressive mechanism. Mixed depressant (SHMP/H 3 Cit) exhibited excellent selective depressive effect on calcite. The optimal molar ratio of SHMP to H 3 Cit was 1:4. The depressant SHMP and H 3 Cit can be chemically bonded with Ca 2+ to form CaHPO 4 and Ca 3 (Cit) 2 at pH 8. The CaHPO 4 was more easily formed than Ca 3 (Cit) 2 on the mineral surface, which indicated that the depressive effect of SHMP was stronger than H 3 Cit. The SHMP and H 3 Cit of the mixed depressant were co-adsorbed on the calcite surface, while the H 3 Cit of the mixed depressant was weakly adsorbed on the scheelite surface. The mixed depressant can significantly improve the separation efficiency of scheelite from calcite. Sodium silicate (water glass) has been widely used as a depressant in flotation of scheelite from calcite [23]. However, sodium silicate also has some disadvantages as a depressant, such as frequent acidification, narrow optimum pH range, and weak selectivity. Single phosphates are also used for calcite depressants, but they are often limited by their weak selectivity, so mixed reagents are often required [24]. Organic macromolecular depressants have also received attention. Zhang et al. studied the role of sodium polyacrylate in flotation separation of scheelite and calcite [25]. However, sodium polyacrylate also has an unfavorable inhibitory effect on scheelite over a wide range of pH conditions, with poor flotation selectivity. Carboxymethyl cellulose has also been studied as a depressant in the flotation separation of scheelite from calcite [26], but it is difficult to dissolve carboxymethyl cellulose at room temperature, which is not conducive to flotation. In view of the shortcomings of the above single depressants, such as poor collecting ability, weak selectivity, and large dosage, it is often necessary to use mixed depressant to achieve flotation separation between scheelite and gangue minerals.Sodium hexametaphosphate (SHMP) is a clean, non-toxic phosphate that is widely used in the food industry and the chemical industry [27,28]. It can be used as a chelating reagent for metal ions, an adhesive, and a swelling reagent [29,30]. It is also widely used in the mineral processing industry, especially in the floatation. SHMP is used as a dispersant and depressant of minerals in flotation [31][32][33][34][35]. In addition, SHMP can be used to depress calcite [24], but it also has a strong depressive effect on scheelite. Citric acid (H 3 Cit) is also a clean, non-toxic organic acid and is a tricarboxylic acid compound. It is mainly used in the food industry, chemical industry, textile industry, cosmetics and pharmaceutical industries [36][37][38]. Citric acid can be used as depress...

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“…When sodium oleate is used as a collector, NaOH treatment exerts a certain activation effect on spodumene otation, whereas HCl treatment exerts an inhibitory effect on this process. P. S. Parapari et al [19] found that acid surface dissolution treatment can increase the content of iron ions on the surface of ilmenite, reduce the isoelectric point of ilmenite, enhance the adsorption of collectors on the surface of ilmenite, and improve otation e ciency. Zhang et al [10] demonstrated that after H 2 SO 4 surface treatment, the adsorption capacity of kaolinite for sodium hexametaphosphate (SHMP) weakened, whereas the adsorption capacity of diaspore for SHMP enhanced.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Dissolution on the Floatability of Brucite in Three Anionic Collector Systems

Gong,

Yao,

Yin

et al. 2024

Preprint

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This study investigated the relation between the solubility and floatability of the soluble mineral brucite, focusing on the concentration characteristics of dissolved Mg2+ in brucite under three dissolution methods and the surface characteristics after dissolution. Some common rules of brucite flotation in three anionic collectors were discovered. Results of a flotation test showed that for three anionic collector systems of sodium oleate, sodium dodecyl sulfonate, and oxidized paraffin soap, the flotation recovery rate of brucite, increased with the time of dissolution and decreased with the removal of dissolved Mg2+, but the flotation recovery rate is lower than that of untreated brucite. Inductively coupled plasma spectroscopy indicated that the content of dissolved Mg2+ in brucite slurry increases with increasing brucite content or dissolution time. Zeta potential measurements showed that the ability of dissolved Mg2+ to increase the surface potential of brucite follows the order of H2SO4 action > HCl action > H2O action. Adsorption capacity measurements showed that the presence of dissolved Mg2+ after dissolution is not beneficial for the adsorption of the three collectors on the surface of brucite. The capacity of the adsorption collectors follows the order of brucite after H2O dissolution > brucite after HCl dissolution > brucite after H2SO4 dissolution. Scanning electron microscopy and X-ray photoelectron spectroscopy analyses indicated that the surface dissolution promoted the dissolution of Mg2+ on brucite surface in the solution, reducing the number of Mg sites on brucite surface and deteriorating the collection effect of the collector.

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Effect of acid surface dissolution pretreatment on the selective flotation of ilmenite from olivine and pyroxene

Cited by 49 publications

References 33 publications

Thermodynamics analysis and experiments on Ti-bearing blast furnace slag leaching enhanced by sulfuric acid roasting

Thermodynamics analysis and experiments on Ti-bearing blast furnace slag leaching enhanced by sulfuric acid roasting

Use of Sodium Hexametaphosphate and Citric Acid Mixture as Depressant in the Flotation Separation of Scheelite from Calcite

Effect of Surface Dissolution on the Floatability of Brucite in Three Anionic Collector Systems

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