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An Overview of Calcite Recovery by Flotation SpringerLink
Overall, most of the studies reported optimum flotation conditions of calcite recovery above pH 8 with anionic collectors. A few researchers have claimed that calcite flotation is independent of pH and some other studies showed that the depression of calcite is possible between pH 8 and 10 while separating it from other salt-type minerals.
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PDF Reagents used in the flotation of phosphate ores A
lective otation of calcite and phosphate from quartz at ... of the mechanisms of depression of apatite minerals in phosphate ores flotation. ... is a crucial issue in phosphate flotation. In ...
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PDF FUNDAMENTAL STUDY OF THE MONAZITECALCITE FLOTATION
The flotation of monazite is depressed when using hydroxamic acid as a collector in the presence of calcium ions which may exist due to the dissolution of minerals such as calcite.
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Insitu study of the kinetics of phosphoric acid
Mar 01, 2021 The depression of apatitic minerals and the flotation of carbonate minerals in the reverse anionic flotation method at acidic pH values are certainly due to the selective surface passivation of these apatitic minerals by a newly formed layer calcium phosphate or carbonate species which may prevent apatite dissolution and adsorption of collectors.
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Effect of dissolution kinetics on flotation response of
Calcite samples. Calcite samples from different origins and genesis were first purified and characterized, and then submitted to dissolution and flotation experiments. Most of the calcite samples (CAM, CCI, CCJ and CSQ) were purified from phosphate ores that are exploited by different mining groups.
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PDF FLOTATION ROUTES FOR A PHOSPHATE ORE
The next step was the the high selectivity of the proposed route. definition of the conditions for the PHOSPHATE ORE CARBON DIOXIDE SOYBEAN BRAN OIL FLOTANOL D25 Calcite Tailings Flotation Feed 174.0 18.1 CALCITE 962.0 100.0 FLOTATION 9.50 8.7 19.82 100.0 75.44 66.4 20.54 100.0 NaOH 4.46 3.3 24.54 100.0 SOYBEAN BRAN OIL Silicate Tailings 286.0 ...
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Floatability of Phosphate Minerals in the Presence of
for flotation of phosphate-containing miner- als at pH values used. Sodium silicate is the most widely used modifi- er in non-sulphide minerals flotation. The reagent depresses silicate minerals significantly in flotation of different kinds of ores and can increase efficiency of calcium minerals separa- tion (Bogdanov et al., 1990).
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Mechanisms Of Phosphate Depression Flotation
Flotation Developments amp Best Practice - International Mining. Nov 4, 2013 ... His lecture Size matters- coarse and quick flotation can reduce costs ... found where Wemco mechanisms were replaced by these mechanisms. ..... copper gold, gold, carbonaceous gold, nickel, phosphate ores and coal. ... in ore mineralogy and poor pyrite depression even at very high dosages of
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Carbonate Phosphate Separation by Flotation
Selective fatty acid flotation of carbonate gangue from sedimentary apatites was achieved under acidic pHs without a specific apatite depressant and without conditioning the pulp with the collector. Concentrates (35-38% P2O5, 0.8-1% MgO) with high recoveries (80-85%) were produced from Indian and Chinese dolomitic ores. The calcareous and/or dolomitic-siliceous phosphate
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Minerals Free FullText Use of Sodium
The flotation separation efficiency of scheelite from calcite was studied by artificial mixed mineral experiments. The depression mechanism of depressant was studied by the solution chemical analysis of the mineral soluble component and the depressant solution. Furthermore, it was proved by the zeta potential of the mineral surfaces.
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PDF A modification in the flotation process of a
Flotation of the phospho-chem and phospho-clasts size fractionThe following conclusions could be reported1. It was easy to float calcite at pH 4.5, without chemical depression of phosphate. Actually, the depression of this latter mineral at this pH was so strong, sometimes, to clog the performance of the cell impeller. 2.
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Effects of sodium carbonate and calcium chloride on
hematite from calcite, uranium oxide from gangue and manganese oxide from gangue 14. Hexametha- phosphate was applied for depressing of calcite in the cationic flotation of smithsonite 11. Sodium silicate was used as a depressant for calcite in the cationic flotation of pyrolusite by Armac C 15. In the flotation
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Cellulase as a new phosphate depressant in dolomite
from the natural phosphate ore. The flotation experiments were carried out to apply this new process using the calcareous phosphate ore. Under the optimum flotation conditions, 0.04% cellulase and 0.5 mM oleic acid, a phosphate concentrate containing 0.89% MgO with a P 2 O 5 recovery of 75% was obtained from the phosphate ore containing 2.2% MgO.
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Research Note LAR MOUNTAIN PHOSPHATE ORE
nature of phosphate depression. This investigation is on the application of the flotation method to process the sample from the Lar Mountain phosphate ore deposit, located in the southwest of Iran with about 81mt phosphate ore reserves. It includes a low grade phosphate ore with a high content of carbonate.
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Effect of calcium concentration on calcite flotation from
Abstract. The flotation process currently considered for apatite concentration from the Santa Quit ria phosphate deposit (Brazil), involves bulk flotation of apatite and calcite with anionic collector at pH10 followed by calcite flotation at pH5.5, adjusted with H 3 PO 4.Although this concept is efficient from the point of view of separation between apatite and calcite, the
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Use of depressants in the direct flotation of a silicate
In this study, conducted in a laboratory scale, eight different depressants, organic and inorganic, were tested in the direct flotation of a Brazilian silicate-carbonate phosphate ore. The best performance in the depression of calcite and silicates was achieved with cassava starch.
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Solution Chemistry Study of Salttype Mineral Flotation
Interactions of salt-type minerals with common inorganic flotation depressants were investigated through solution chemistry calculations. From the constructed conditional solubility product limits and the actual solubility product lines of calcium silicate and phosphate in fluorite, calcite, and apatite single-mineral systems, the critical precipitation pH or concentration of silicate and ...
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Role of Dissolved Mineral Species in CalciteApatite Flotation
Supernatants of apatite and even that of calcite depressed the flotation of calcite markedly in the pH range of 5 to 13. Addition of Ca(NO3)2, K2CO3, and K3PO4 also produced definite effects under various pH conditions. Apatite flotation was also affected by the mineral supernatants and by carbonate and phosphate solutions.
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Direct flotation of lowgrade Moroccan phosphate ores a
Nov 23, 2020 Moroccan high-grade phosphate has so far always been upgraded by reverse flotation. Within a major project to go back to the deposits considered as sterile or low grade, this preliminary study was conducted in a micro-flotation cell to find new routes for their beneficiation by direct flotation. Three collectors, alone and combined to modifiers, were evaluated for a potential direct flotation ...
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Flotation collectors optimized performance
Flotation of phosphate Phosphate ore is the most important source of phosphorus in fertilizers. To supply the phosphoric acid plant with phosphate, a high grade of phosphorus is essential, as well as reduced levels of impurities such as magnesium, iron and aluminum oxides. Flotation is one of the key beneficiation methods.
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Mechanisms Of Phosphate Depression Flotation
Calciteoleateoxalate Interaction In Calcite Flotation . Its presence as a gangue mineral represents a problem in phosphate flotation.Mechanisms and consequently the flotation.Depression of phosphate. Read More
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Flotation separation of scheelite from calcite using
achieved by controlling the flotation pH and PA-Na dosage. Keywords scheelite, calcite, flotation, sodium polyacrylate, selective depression 1. Introduction Calcium-bearing minerals such as scheelite, calcite are important industrial minerals, they can be used as raw materials for production of spaceflight, cement and so on.
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EFFECfS OF DISSOLVED MINERAL SPECIES ON THE
The effects of dissolved mineral species of calcite and apatite on the flotation of these minerals has been shown recently in our laboratory to be drastic under certain solution conditions 6. Flotation of calcite and apatite in mineral supernatants was drastically depressed due to the pre-sence of dissolved species.
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Effect of sodium pyrophosphate on the flotation separation
Keywords apatite calcite sodium pyrophosphate depression mechanism flotation. 1. Introduction Phosphorus resources are essential for agriculture, and more than 90% of phosphorus resources have been consumed as fertilizers for food growth 1. The natural loss of phosphorus in soil requires the constant artificial addition of phosphate 2.
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Effect of calcium concentration on calcite flotation
(sink fraction) could be adding one more flotation stage of the sink fraction Considering that the collector reacts with the calcium present in the calcite as well as with the free Ca2 ions, the calcite flotation must be conducted with a higher collector dosage in order to reach the same flotation performance of contamination-free phosphate rock.
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An Alternative Flotation Process for Apatite
Calcite flotation Coarse fraction Effectof the collector dosage Calcite concentrate Mass recoveryP2O5 recovery and P 2O5 grade 27,2 30,6 34,8 25 30 35 40 20,8 0,4 0,7 1,4 4,3 0,4 0,5 0,9 2,6 0 5 10 15 20 200 300 400 500 (%) Coconut
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Review of the Main Factors Affecting the Flotation of
The way to successfully upgrade a phosphate ore is based on the full understanding of its mineralogy, minerals surface properties, minerals distribution and liberation. The conception of a treatment process consists of choosing the proper operations with an adequate succession depending on the ore properties. Usually, froth flotation takes place in phosphate enrichment
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ELECTROKINETIC PROPERTIES AND FLOTATION BEHAVIOUR
Dec 01, 1993 The electrokinetic properties and flotation behaviour of Israeli francolite and calcite were studied in order to develop a process for direct flotation of the Negev phosphates. The surface charges of the minerals were measured by microelectrophoresis at different pH values in the presence of the collector. The results suggest that the collector is adsorbed
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The Florida Institute of Phosphate Research was created
Dec 01, 2014 Separation of calcite and/or dolomite from phosphate rock by flotation is becoming the practice in several phosphate mining areas where higher carbonate contamination is encountered. In almost all cases, the phosphate rock must be ground to liberate the calcite and/or dolomite so that it can be separated from the phosphate rock.However,
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US3259242A Beneficiation of apatitecalcite ores
US3259242A US241057A US24105762A US3259242A US 3259242 A US3259242 A US 3259242A US 241057 A US241057 A US 241057A US 24105762 A US24105762 A US 24105762A US 3259242 A US3259242 A US 3259242A Authority US United States Prior art keywords flotation apatite calcite macrocrystalline acid Prior art date 1962-11-29 Legal status
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Reagent Adsorption on Phosphates Columbia University
1564 II / FLOTATION / Reagent Adsorption on Phosphates- 01-1, 01)22-/ L. / I-// trolthe dissolution of calcite and apatite in water are given in Table 1. In the case of carbonaceous phosphate minerals, apatite, calcite and dolomite will dissolve in water, followed by pH-dependent hydrolysis and complexa-tion of the dissolved species.
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Selective Flotation of Cassiterite from Calcite with
Cassiterite is the most common and important tin-bearing mineral, and calcite, a primary gangue mineral is generally found in tin deposit. The flotation separation of cassiterite from calcite remains a challenge due to their similar response to traditional reagents. In cassiterite flotation, sodium oleate (NaOL) and sodium silicate (SS) have been widely used as a collector and a
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sodium carbonate flotation
carbonate depression in flotation kinesiologie eindhoven nl In this ph range, the flotation recovery of pyrolusite is higher than that of calcite sodium carbonate and calcium chloride have a good depression effect on the calcite flotation sodium carbonate acts more effectively than calcium chloride these depressant agents do not have a ...
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Phosphate C Axis House
In general, phosphate ore is processed by flotation to reduce the content of the gangue minerals, which typically consists of quartz, feldspar, mica, calcite, dolomite, etc. The Axis House phosphate reagent range can be successfully applied to efficiently separate phosphate and gangue mineral during the flotation process. FLOTATION
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Developments in phosphaterock beneficiation and the
phate to depress apatite during calcite flotation. Zuplatec (26) patented a process of calcite flota-tion with fatty acids using gelatin amide as phosphate depressant. The depressant action of alkali phosphates, alkali sulphates and H 3 PO 4 , on apatite was recently studied by John David (27) during calcite flotation. In recent years
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Phosphate Rock Treatment for Waste Reduction
Separation of calcite and/or dolomite from phosphate rock by flotation is becoming the practice in several phosphate mining areas where higher carbonate contamination is encountered. In almost all cases, the phosphate rock must be ground to liberate the calcite and/or dolomite so that it can be separated from the phosphate rock.
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Mineral Flotation
With fluorite and apatite there is a minor effect, but with scheelite very little effect The effect with phosphate is shown above for the flotation of phosphate. Flotation of calcite with 5x10-4 oleate and 5x10-4 sodium silicate Flotation of apatite with 1x10-4M oleate with/without silicate addition Depressants for semisoluble salts Starches, etc.
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Improved Flotation Separation of Apatite from Calcite
Sep 18, 2019 Apatite (Ca 10 (PO 4) 6 F 2) is the most important phosphate mineral, and flotation is the main beneficiation method to separate apatite from its major gangue mineral calcite (CaCO 3).Till date, fatty acids and their salts have been widely used as collectors in the apatite/calcite flotation separation due to their low cost and strong collecting ability, but their
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dolomite flotation flow
mechanisms of phosphate depression flotation. Below is some information about the products ... dolomite crushing plant flow chart. dolomite crushing plant flow ... gold mining flotation machine,gold extraction equipment ... gold mining flotation machine,gold extraction equipment. Flotation Machine for Gold Mining.
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FLOTABILITY STUDIES OF THE MINERALS APATITE
these minerais that are presenl in carbonated Brazilian phosphate rocks and are concentrated by froth flotation. 2-MATERIALS AND METHODS ln this work mineral samples of apatite, calcite and dolomite were used in lhe size range from 147 to 44Jlm. Their chemical compositions are presenled in Table II.
