·Consequently phosphoric acid demonstrates a stronger inhibitory effect on apatite flotation compared to dolomite Sis and Chander 2003 The inadequate selectivity of oleic acid has prompted research focus in the field of apatite flotation on the development of new highly selective collectors as replacements Amphoteric collectors stand out
·Key Laboratory for Green Chemical Process of Ministry of Education Wuhan Institute of Technology Wuhan China; The phosphate ore flotation is achieved through the surface electrical behavior difference among apatite dolomite and quartz but it is usually affected by the dissolved ions from pulp especially Ca 2 and Mg 2 The zeta potentials of apatite
·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
·In this study sodium fatty alcohol polyoxyethylene ether carboxylates with 3 5 and 7 EO repeating units AEC 3 Na AEC 5 Na and AEC 7 Na were synthesized The performance of the AECNa series collectors was investigated by flotation tests for calcium species including calcite dolomite and quartz activated by calcium ions [18] The properties
·dispersed air flotation cell the flow conditions were more intensive in the complex solid/liquid/air system Dolomite which was mineralogically crystalline was the more
·Phosphate ore is the dominating natural resource for the production of fertilizers and phosphorous chemical products Flotation is the most widely employed technique to enrich apatite and remove the impurities for the separation of the phosphate ore The flotation reagents play an important role in this efficient separation of phosphate ores In the last few decades
·The flotation performances and adsorption mechanism of XG towards apatite and dolomite were studied through flotation tests adsorption capacity measurements micro heat tests atoms density
·After a steady hot flow arising the separation membrane was pierced for the reaction of mineral and XG The measurement was terminated when the signal of calorimeter was stabilized again To further verifying the separation performance of XG towards apatite and dolomite the flotation tests of artificial mixed minerals dolomite apatite
Froth flotation is currently acknowledged as a highly effective technique for the beneficiation of apatite extracted from the phosphate rocks [11] [12] However the flotation of apatite encounters significant difficulties in achieving high separation efficiency particularly when dolomite a carbonate mineral is predominant as the gangue mineral
the flotation recovery of dolomite dropped dramatically to % and the recovery of apatite remained at about % at pH 10 Micro flotation test The microflotation flow was depicted in Fig 3 The single mineral flotation test was carried out using the microflotation test method In the experiment the XFGC flotation machine
pulp pH value and the recovery of magnesite is higher than that of dolomite under the same flotation pH conditions At pH 7 11 the recovery of magnesite increased from % to % and the recovery of dolomite flotation increased from % to
The separation of magnesite from dolomite was achieved in a reverse flotation which resulted in a per cent yield of magnesite with a grade of per cent at 100 ppm dodecyl phosphate and 75 ppm sodium silicate The flotation mechanism was investigated by characterising surface electrical properties and measuring the adsorption density of
flotation time of two minutes was used at a nitrogen flow rate of 70 cm3/min The The experiments were repeated three times and the reported values were the average of
·Dolomite a prominent calcium bearing gangue mineral found in carbonate type zinc oxide ores poses a significant challenge for effective flotation separation alongside smithsonite due to their highly similar surface properties The present study explores the potential of 2 4 4 dimethylpentan 2 yl 5 7 7 trimethyloctanoic acid 2 DMPT as a collector for the
·As a result in the presence of PBTCA dolomite exhibited a poor flotation performance while there was good floatability for fluorapatite which benefited the efficient recovery of fluorapatite
·As another key indicator of flotation performance the recoveries of apatite calcite and dolomite after min of collector conditioning and min of flotation were determined and are presented in Fig 10 d f As illustrated the apatite recovery exhibits a parallel trend with its grade increasing with higher collector dosages and lower
·Therefore HEDP is used as a selective depressant of fluorapatite in the fluorapatite dolomite flotation separation process Flow sheet of single mineral flotation experiment
·Smithsonite dolomite and calcite are carbonate minerals The crystal structures and spatial distribution characteristics of their common surface metal sites are similar leading to difficulty in the flotation separation of smithsonite from these carbonate gangues In this paper the floatability of smithsonite dolomite and calcite in sodium oleate salicylhydroxamic acid and
·The flotation method is commonly used for concentrating phosphate minerals and other valuable minerals [21] [22] [23] [24] For the phosphate ore with low content magnesium minerals dolomite reverse flotation was used to remove magnesium minerals using the reagent scheme of acid adjustors/fatty acid collectors [25] [26] During this process acid adjustors H 3
·Enhancing selective calcite and dolomite flotation in the phosphate ores Investigation modeling and automated mineralogy assessment according to a specified dosage and conditioned for 1 min Carbonate flotation starts by the introduction of air at a flow rate of 10 L/min and pursue for 6 min as presented in Fig 2 The recovered froth
·Samples of magnesite and dolomite were obtained from Liaoning Province China The X ray diffraction patterns of the samples are shown in Fig compositions of magnesite and dolomite were determined via X ray fluorescence chemical analysis and the chemical analyses results are listed in Table purity of the magnesite and dolomite is
·In this paper Na 2 ATP was first applied as a depressant in the flotation separation of magnesite and dolomite with sodium oleate The significant influence of Na 2 ATP on the flotation behavior of magnesite and dolomite was investigated via flotation tests The selective adsorption behavior of Na 2 ATP on different mineral surfaces was studied through
·The flotation of dolomite and apatite minerals against the pH range of pH 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
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 using an atomic force microscope AFM
