Influence of quebracho and sodium silicate on flotation of celestite and calcite with sodium oleate

Castro, F. Hernáinz Bermúdez de; Calero, M.

doi:10.1016/0301-7516(93)90032-6

Cited by 48 publications

(2 citation statements)

References 2 publications

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“…TA (Figure 1) is usually considered amorphous and comprises a large number of similar carboxyl and phenolic hydroxyl groups that have a special affinity for metal ions, such as calcium ions (Xu et al 2019). It has been demonstrated that TA can be anchored to the surface of calcite and fluorite by bonding with calcium atoms (Bermúdez and Hoces 1993; Ozcan and Bulutcu 1993; Bermúdez and Borrego 1996; Rutledge and Anderson 2015; Zhang et al 2018; Tangarfa and Hassani 2022). Notably, these early studies were limited to brief investigations to reveal the occurrence of adsorption reactions between TA and the surfaces of fluorite and calcite.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of tannic acid as depressant in the flotation separation of fluorite and bastnaesite

Guo,

Hou,

Jin

et al. 2023

Mineral Processing and Extractive Metallurgy: Transactions of t

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Fluorite, a strategic industrial mineral, was investigated for flotation separation from bastnaesite with tannic acid (TA) as depressant. In this study, the adsorption analysis indicates that the adsorption density of TA on bastnaesite was greater than that of fluorite. The zeta potential, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) provide the evidence that chemisorption and electrostatic attraction occurred simultaneously between TA and fluorite or bastnaesite at optimal pH, the latter also involving hydrogen bonding interactions. Furthermore, the micro-flotation and batch flotation results suggest that TA could effectively depress bastnaesite with a negligible effect on fluorite at low concentrations, and that TA attached to the surface of bastnaesite precluded the adsorption of phthalic acid (PA) as collector, whereas it could be adsorbed on the fluorite surface. These findings offer a robust theoretical foundation and valid guidance for the flotation separation of fluorite from bastnaesite in industrial processes.

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Section: Introductionmentioning

confidence: 99%

Adsorption of tannic acid as depressant in the flotation separation of fluorite and bastnaesite

Guo,

Hou,

Jin

et al. 2023

Mineral Processing and Extractive Metallurgy: Transactions of t

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“…However, the beneficiation technique which is necessary to upgrade relatively low grade ores to reach the conversion criteria mainly depends on the liberation characters of the investigated ore. Generally, this technique could be via different gravity separators alone or both gravity and flotation techniques. [7][8][9][10][11] Since SrSO 4 is water insoluble substance, the most common commercial process for producing strontium carbonate from celestite is what so called 'black ash process' in which the celestite is calcined at an elevated temperature (1000uC) with finely ground carbon to produce strontium sulphide (SrS) which is water soluble. Then, strontium sulphide is leached with hot water and separated from solid impurities by filtration.…”

Section: Introductionmentioning

confidence: 99%

Isothermal reduction behaviour of celestite concentrate by solid carbon

Halim

Ibrahim

El-Barawy

2009

Mineral Processing and Extractive Metallurgy

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Compacts made of concentrated celestite ore (SrSO 4 , 96?5%) were reduced isothermally at 950-1100uC by solid carbon. The reduction of SrSO 4 (water insoluble) to SrS (water soluble) is an important step to produce the most common industrial reagents of strontium salts (SrCO 3 , SrNO 3 and SrCl 2 ). The isothermal reduction behaviour was investigated using advanced quadrupole mass spectrometer. X-ray diffraction and SEM analysis were used to characterise the reduced samples. The influence of reduction conditions on the structural characteristics of the products was extensively studied to get clear comprehension of reduction process. It was found that celestite ore is completely reduced to SrS at a temperature above 900uC and the reduction rate increases with temperature. The experimental measurements were used to elucidate the carbothermic reduction mechanism of celestite ores. The reduction of celestite proceeded in only one step and Boudouard reaction is the rate controlling step. The calculated values of activation energy (115?3 kJ mol 21 ) revealed that solid state diffusion mechanism seems to have a role in the reduction process.

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