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PDF On May 6 2016 Manel Ben Fredj and others published Quartz sand beneficiation using magnetic and electrostatic separation for use in glass industries Find read and cite all the research
Carboxymethyl cellulose CMC was introduced as a depressant in reverse flotation separation of quartz from CMC 、CMC
·However the separation performance of the flotation was lower at pH 7 regardless of the collector concentration Thus more collector molecules are adsorbed on the quartz surface than the apatite surface at pH 3 and 5 × 10 −5 M of collector resulting in separation of quartz and apatite The extended Derjaguin Landau Verwey Overbeek
·The most prevalent cationic collectors are organic compounds of amine [7] The amine collector is adsorbed on the negatively charged mineral surface during the flotation process where it is captured by molecular and electrostatic forces [10] [11] However traditional amine cationic collectors exhibit poorer selectivity and weaker collecting ability in flotation
·Froth flotation is the selected method for the separation of quartz and feldspar In the conventional process feldspar is floated from quartz by using hydrofluoric acid HF as activator for the feldspar and a cationic collector amine at pH 2 3 O Meara 1939 Sandvik 1979 reported that HF creates a large difference in the minerals zeta potentials as the zeta
·Compared with quartz the surface electronegativity of apatite is weaker while the polar group charges of HDMEA and DDA are almost the same so the large polar group size might explain that HDMEA showed the weaker collection effect on the apatite than DDA Consequently the HDMEA exhibited better separation behavior for quartz and apatite
In the study to improve the water solubility and separation performance of quartz and hematite a new cationic collector 2 dodecylamino 2 methyl 1 propanol DAMP was synthesized by introducing hydroxyethyl into the nitrogen atoms of DDA which is a new type amine collector in the reverse flotation separation of quartz from hematite
·The resultant superhydrophobic quartz sand exhibits oleophilicity and can act as a high performance filter to separate oil water mixture with a good reusability which makes it feasible for the oil film on the surface of water to be fully adsorbed by the treated quartz
·Sodium silicate and starch were thus tested as depressants of both hematite and quartz The separation efficiency of REO in the absence of depressants was low and averaged % at 99% REO
·In the reverse flotation separation of apatite and quartz N 2 aminoethyl 3 aminopropyltrisiloxane AATS stands out with its umbrella structure which enhances its collecting ability for quartz particles and exhibits a superior selectivity compared to dodecylamine Huang et al 2020
·Using mixed collectors has become a promising method to improve the quartz feldspar separation In this study mixed dodecyl amine DDA and sodium petroleum sulfonate SPS surfactants were used
·With feldspar the entrained free quartz was first removed by additional selective flotation without and with surface preparation after which a combination of acid leach and magnetic separation
·The recovery of quartz increased rapidly and was higher than that of spodumene At pH 10 the recoveries of spodumene and quartz were % and % respectively This means that the separation of spodumene and quartz can be achieved by using pectin as depressant at a pH range of 10 12
·We found that the radiometric separation of original quartz samples with the Fe2O3 content of % produces pure quartz with the Fe2O3 content of ≤ % and a yield of 65 70% Provided
·The current centrifugal concentrators do not continuously concentrate heavy minerals of large mass weight—for example in the processing of iron oxides A cyclone centrifugal separator is a new type of beneficiation equipment that has been developed on the basis of the principles of centrifugal separation and hydrocyclones In this study a cyclone
·The separation of quartz from the target mineral has always been of great importance in the beneficiation process [1 5] Since silicate minerals are non magnetic with low specific gravity flotation is the common approach for their recovery in industrial practice [6 10] a beneficiation method utilizing the difference in surface hydrophobicity
·Effects of sulphuric acid and ammonia chloride on muscovite dissolution were studied in acid leaching of vein quartz under elevated temperature and pressure The leaching processes have been studied in detail by analyzing sources of impurity minerals optimizing leaching process analyzing leaching kinetics of Al in muscovite and charactering leaching
·Regarding magnetite/quartz separation selectivity Fig 4b the maximum separation efficiency SE for ether monoamine versus ether diamine was achieved at the collector concentration of 20 mg/L
·Flotation responses of quartz and feldspar in 20 mg/l diamine solution PDP and as a function of various depressants concentration 4M It can be seen in Figure 2 that it is evident the difference in floatability of minerals in the flotation cell in presence of EDTA and the best quartz feldspar separation are obtained at pH of around 2
·Following an analysis of the separation index and chemical composition the optimum conditions for the quartz preconcentration were determined as a magnetic flow ratio of T s/m a slurry
·DDAIP demonstrated a superior selectivity in the reverse flotation separation of apatite and quartz in comparison to DDA Zeta potential experiments indicated that under identical dosages DDAIP demonstrated increased adsorption capacities on quartz surface in contrast to DDA whereas the adsorption amounts on apatite surface remained similar for both
·Hydrofluoric acid HF is traditionally used in plant operation to separate feldspars from quartz It acts during the conditioning step as a pH regulator and an activating agent providing an excellent selectivity However a corrosive chemical environment and the ecological impacts from the potential fluoride ion contamination are limiting factors to use this chemical
·Hardness of surface hydroxyls and its pivotal role in the flotation of cassiterite from quartz via lead ions activation Separation and Purification Technology IF Pub Date 2024 04 18 DOI /
·In the reverse flotation separation of apatite and quartz DPA demonstrates an improved adsorption capacity for quartz and a superior selectivity compared to DDA [49] Building on the insights from the aforementioned research this paper introduces a 2 hydroxy propyl group into the molecular structure of DDA resulting in the synthesis of a new
·In this work we evaluated the effectiveness of a new combined collector for the separation of collophanite dolomite and quartz using isooctyl ether phosphate AEP and octadecylamine polyoxyethylene ether AC1810 To explain the flotation phenomenon we
·In the study the effect of different depressants on the flotation separation of quartz and feldspar was examined by using magnesium chloride MgCl 2 as an activator and sodium oleate NaOL as a collector Additionally the flotation mechanism was further analyzed using Raman spectroscopy and X ray photoelectron spectroscopy XPS analyses
