A fluctuating solution to the dolomite problem
One recent idea is that the ordered arrangement of calcium and magnesium atoms in the dolomite structure does not form during precipitation. Rather, calcium- magnesium carbonate precipitates in a disordered manner, and then order emerges from a slow maturation process on a geological timescale (6, 7).The surface of the initial …
Two-stage reverse flotation process for removal of …
The flotation of dolomite and apatite minerals against the pH range of pH 4.8–9.5 is presented in Fig. 8 at 150 mg/L of collector concentration in the presence of H 3 PO 4 and CaO to both adjust the pH and depress apatite. Evidently, there is a considerable difference between the floatability of the two minerals at acidic and neutral pH but ...
Effect of solution chemistry on flotability of magnesite and dolomite
Flow-through experiments with citric acid on dolostone were conducted, creating dissolution regimes with a range of different Damköhler numbers. ... In the present study, the flotation of dolomite and magnesite in acidic to neutral pH was investigated using oleate as collector and hydrochloric acid or phosphoric acid as pH regulator. It was ...
Separating dolomite from phosphate rock by reactive flotation …
dolomite and apatite flotation has been studi ed [Rao, 1985]. It was shown that sodium . chloride acts as apatite depressant during fl otation at acidic pH values with oleic acid,
Selective Flotation Behavior of Dolomite from …
In the reverse flotation of fluorapatite and dolomite, high-efficiency depressors of fluorapatite have received considerable attention. In this paper, the depression mechanism of hydroxy ethylene …
Process Mineralogy Characteristics and Flotation …
It was the major depressant employed in the selective inhibition of gangue minerals such as quartz, talc, fluorite, dolomite, and calcite [28,29]. At present, ... The obtained tailing of lead flotation was used for the feed of zinc flotation, and the flow sheet is shown in Figure 10. A roughing process was performed for each dose investigation ...
Effect of ionic species on the performance of apatite flotation
Research highlights. The effect of water-soluble ionic species concentration on the apatite flotation was quantified. All the contaminants studied contributed to the decline in apatite recovery. Magnesium caused the increasing NaOH consumption and the lowest P2O5 grade. Calcium and phosphate were responsible for the lowest recovery …
Experimental and simulation study on the flotation …
2.9.2. DFT simulation. DFT is extensively employed to analyze the chemical reaction mechanisms between flotation reagents and mineral surfaces, thereby enhancing the …
Selective flotation of calcite and dolomite from apatite …
1. Introduction. Calcite and dolomite are frequently encountered in sedimentary ores alongside valuable minerals. Issues arise when these latter are calcium-bearing minerals too (Jiao et al., 2023, Pereira et al., 2023).Froth flotation is usually introduced in the upgrading process of this type of ores, especially in the absence of …
Utilization of a novel bisphosphonic acid surfactant for …
Utilization of a novel bisphosphonic acid surfactant for reverse froth flotation of magnesite and dolomite. Author links open overlay panel Wenhan Sun a, Wengang Liu a b, Wenbao Liu a, Pengcheng Li c, Yanbai Shen a, Shujuan Dai c. ... The temperature and flow rate of hot carrier gas and the amount of raw material are analyzed and optimized ...
Activation of Dolomite Flotation by Ferrous Hydroxide and …
The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in dolomite flotation are still not fully understood. Herein, the correlation of Fe2+ conversion with xanthate adsorption and dolomite flotation was …
Review of the Main Factors Affecting the Flotation of Phosphate …
The overall aim is to control the selectivity and recovery of the process. The following review is an attempt to add to previous works gathering phosphate froth flotation data. In that sense, the relevant parameters of phosphate ores flotation are discussed while focusing on apatite, calcite, dolomite, and quartz as main constituent minerals.
Enhancing selective calcite and dolomite flotation in the …
This paper presents a comprehensive study on the selective flotation of a multi calcium-bearing minerals ore, focusing on the efficient removal of dolomite and calcite impurities from a carbonaceous sedimentary phosphate ore. Commercial fatty acid (FA) and phosphate ester collectors were investigated in a reverse flotation process, assessing …
Intensify dodecylamine adsorption on magnesite and dolomite …
The flotation flow sheet of magnesite and dolomite. 2.3. Zeta-potential measurements. Zeta potential measurements were carried out using a Nano-ZS90 zeta potential analyzer ... which could explain the reason that the flotation of dolomite was much better than that of magnesite by DDA.
Cyclonic flotation column of siliceous phosphate ore
The results from flotation experiments illustrated that PAMS effectively depressed the dolomite flotation whereas it exhibited weak influences on the floatability of apatite. It was also found that the reagent scheme of 14 mg/L PAMS and 100 mg/L NaOl could effectively remove dolomite from apatite at pH 9.00.
Experimental and simulation study on the flotation …
2.9.2. DFT simulation. DFT is extensively employed to analyze the chemical reaction mechanisms between flotation reagents and mineral surfaces, thereby enhancing the efficiency and selectivity of the flotation process [30], [31].The optimization of geometry and calculation of energy for the dolomite crystal and its adsorption system were …
Recent process developments in beneficiation and …
Surface chemistry and flotation behavior of dolomite, monazite and bastnäsite in the presence of benzohydroxamate, sodium oleate and phosphoric acid ester collectors ... HMPT temperature of 500 °C, gas flow rate of 3.5 m 3 /h and gas concentration of 22.5 vol%. After grinding and flotation defluorination, the obtained iron …
Article Flotation Separation of Dolomite from …
speed of 1800 rpm, Figure 2 presents the schematic of XFG‐II flotation machine [11,12]. As for the single mineral flotation, the procedure was described as follows: firstly, 2 g of flu‐ orapatite/dolomite was added in the flotation cell with 50 mL pure water, and then stirred 2 min for dispersion.
Effect and mechanism of phosphoric acid in the …
Fatty acids (e.g., sodium oleate) are the most widely used collectors in apatite and dolomite flotation; a small amount or more than 10 kg of phosphoric acid (H3PO4) …
CO2 bubble formation on dolomite surface and its influence …
Dolomite is a common carbonate mineral that can release CO2 gas under acidic conditions. The formation of bubbles on the dolomite surface might play a critical role in the flotation separation of dolomite from apatite. In this study, the CO2 bubbles formation due to CO2 gas releasing from the dolomite surface under acidic condition was observed …
MgO Dolomite Flotation
Flotation feed material was conditioned at pH 10.0 with fatty acid followed by flotation of apatite and dolomite at pH 8. The float fraction was then reconditioned at …
Enhancing selective calcite and dolomite flotation in the …
Enhancing selective calcite and dolomite flotation in the phosphate ores: Investigation, modeling, and automated mineralogy assessment ... according to a …
Two-stage reverse flotation process for removal of …
The flotation of dolomite and apatite minerals against the pH range of pH 4.8–9.5 is presented in Fig. 8 at 150 mg/L of collector concentration in the presence of H …
CO2 bubble formation on dolomite surface and its influence …
Dolomite is a common carbonate mineral that can release CO2 gas under acidic conditions. The formation of bubbles on the dolomite surface might play a critical role in the flotation ...
Flotation of phosphate ores containing dolomite
A reverse flotation process for removing alkaline earth metal carbonate impurities particularly dolomite and calcite as the cell overflow from a flotation feed reagentized with water, a carbonate collector, a phosphate depressant and a pH regulator to about 20-30% solids and a pH of about 5.5-6.0. The phosphate concentrate is collected as the cell …
Flotation separation of magnesite from dolomite with …
The flotation results indicated that, when sodium oleate (NaOl) was used as the collector, HEDP displayed an outstanding depression effect on the dolomite flotation, whereas it had only a slight ...
CO2 bubble formation on dolomite surface and its …
dolomite surface were detected by AFM in a pH 5 solution. Meanwhile, the deionized aqueous solution was serves as a reference. The influence of CO 2 bubbles on flotation behavior and surface wettability of dolomite was clarified by micro-flotation test, contact angle measurement, and molecular dynamics simulation (MDS). 2. Materials and …
Effective flotation separation of apatite from dolomite …
To achieve flotation separation of apatite and dolomite, depressants are required, but conventional depressants have several drawbacks. Hence, the development of effective and environmentally friendly depressants is of great importance. This study aimed to investigate the depressive effect of gallic acid (GA) on the flotation separation of ...
Activation of Dolomite Flotation by Ferrous …
The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in dolomite flotation …
Simplified flowsheet for CLDRI dolomite flotation
Download scientific diagram | Simplified flowsheet for CLDRI dolomite flotation from publication: Separating dolomite from phosphate rock by reactive flotation [electronic resource] : fundamentals ...