For iron ore, reverse flotation of quartz using cationic collectors has been testified as one of the most efficient methods [6]. ... Diamine collectors with two N atoms exhibited stronger collecting ability and better selectivity than DDA in hematite-quartz separation system [1], [11]. Several research revealed that the introduction of hydroxyl ...Web
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The 12 C diamine is a stronger collector for quartz than the 12 C monoamine. Probable surface chemical phenomena giving rise to the observed experimental results …Web
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Filippov et al. found that the addition of a C13-rich iso-alcohol to ether diamine increased the quartz flotation recovery from 52 to 84% at pH 10. In addition, Filippov, et al. [ 78 ] observed that adding iso-alcohols to ether diamine could also improve the floatability of Fe-bearing mica silicates at pH 8, while use of the amine alone ...Web
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This way, as the diamine concentration became higher than 5 mg/L for quartz and higher than 10 mg/L for magnetite, θ decreased steadily for either quartz (from 74° to 40°) or magnetite (from 66° to 37°), although the magnitude of θ was sufficiently high to promote the flotation of ultrafine particles (d 50 =7.5 μ m) 33.Web
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The dissolution of carbonates at low pH value facilitates the quartz flotation. At pH 4.8, the P 2 O 5 grade, P 2 O 5 recovery and quartz removal ratio are 30.82%, 82.00% and 62.20%, respectively. Calcination can be employed to separate calcite gangue; however, it should be applied after quartz flotation to avoid the formation of CaSiO 3 …Web
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adding iso-alcohols to ether diamine increases the quartz flotation recovery from 52 to 84% at the iso- alcohol concentration of 2.6 × 10 - 5 M ( Fig. 1 ). W ith a constant ether diamine ...Web
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Diamine flotation of quartz 145 Thus, the solubilities of the 8 and 16 C diamine molecular species should be very roughly 4 x 10-5 and 4 x 10-9 kmol/m3, respectively. Figure 5 is a log concentration diagram for the n-dodecylamine aqueous system when the solution is in equilibrium with solid n-dodecylamine at 22-25 °C [16-19]. …Web
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adsorption mechanisms of L0-503 in the petalite and quartz flotation systems were revealed. A possible adsorption model of L0-503 in the petalite flotation system is proposed. This study provides new insights and a theoretical basis for improving the separation of petalite and quartz in the flotation process. 2. Materials and Methods 2.1.Web
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Fig. 1 shows the cumulative recovery of kaolinite as a function of flotation time at pH 10, using 100 g/t of ether monoamine or ether diamine collector. Surprisingly, ether diamine which is a strong collector for quartz does not float kaolinite at pH 10. Ether monoamine was found to be a weak collector for kaolinite, with only 15.3% kaolinite …Web
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The collecting performances of N-dodecylethylene-diamine (ND) to quartz and hematite were studied via single mineral flotation. Experimental results show that ND has stronger collecting ability to ...Web
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This paper presents the diamine flotation of calcite ore using zeta potential, Hallimond tube flotation and adsorption by FTIR studies. Optimum conditions for removal of sulphide impurities are outlined and the results were discussed. ... Scott J, Smith RW (1991) Diamine flotation of quartz. Miner Eng 4:141–150. Article Google Scholar Sirkeci ...Web
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Selective flotation of albite is accomplished from a natural feldspar material with tallow diamine-dioleate collector at pH 2 using sulfuric acid, only when the feed is deslimed prior to the bench scale flotation tests. An albite recovery exceeding 85% is achieved from a feed material containing about 50% albite.Web
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Flotation and adsorption of quartz with the new collector butane-3-heptyloxy-1,2-diamine Cheng, Zhouyueyang ; Zhu, Yimin ; Li, Yanjun ; Han, Yuexin A new surfactant butane-3 …Web
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A new surfactant butane-3-heptyloxy-1,2-diamine [CH3(CH2)6OCH(CH3)CH(NH2)CH2NH2; BHLD] was synthesized. ... It has been innovatively used as a collector in the flotation of quartz. In this present ...Web
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The effect of amine type, pH, and size range in the flotation of quartz. Minerals Engineering, v. 20, p. 1008-1013, 2007. conducted column flotation tests using pure quartz in three size ranges (coarse -297 + 150 …Web
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A new surfactant butane-3-heptyloxy-1,2-diamine [CH3(CH2)6OCH(CH3)CH(NH2)CH2NH2; BHLD] was synthesized. ... It has been innovatively used as a collector in the flotation of quartz. In this present ...Web
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This study investigates the hydrophobic aggregation of fine quartz particles through shear flocculation induced by dodecylamine in aqueous solutions. The effect of stirring speed, collector concentration, flocculation time, and pH were investigated. The results showed that the impact of stirring speed on particle aggregation in the absence of …Web
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The single mineral flotation tests showed the feasibility of selective albite flotation from quartz at around pH 2 using a mixture of cationic diamine and anionic sulfonate collectors or a combined cationic-anionic collector of diamine-dioleate. ... J.L., and Smith, R.W., 1991, "Diamine flotation of quartz," Minerals Engineering, Vol. 4, No ...Web
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Considering the better collectability of amide-amine for quartz flotation and lower adsorption affinity for hematite surface than etheramine, the amide-amine is a promising collector to be used in reversal iron ore flotation. ... De-Zhou W, Bao-Yuv C (2011) Collecting performances of N-dodecylethylene-diamine and its adsorption …Web
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The flotation of quartz with diamine was very efficient over the concentration in which iono-molecular complexes predominate and a further increase in concentration leads to the appearance of precipitates of amines according to the log concentration diagrams for n-propyl-1,3-diamine collector (Fuerstenau and Raghavan, 1977).Web
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Chipakwe et al. examined the efect of a polyacrylic acid-based grinding additive (GA) through flotation separation of magnetite from quartz (size fraction of − 106 + 38 μm) …Web
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Surprisingly, ether diamine which is a strong collector for quartz does not float kaolinite at pH 10. Ether monoamine was found to be a weak collector for kaolinite, with only 15.3% kaolinite ...Web
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The flotation separation of smithsonite from calcite and quartz using a alkyl diamine ether (GE-609) as the collector was investigated through micro-flotation experiments and the real ore ...Web
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Flotation is the widest applied method for quartz removal from other valuable minerals [4], [5]. For iron ore, reverse flotation of quartz using cationic collectors has …Web
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It was observed that ether diamine was more effective in the flotation of medium and coarse quartz, while ether monoamine performs better in the case of fine …Web
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The mechanism of selective feldspar flotation from quartz in mixed alkyl diamine/sulfonate collectors at pH 2 is distinguished. The charge difference between microcline and quartz at pH ⩽ 2 with quartz exhibiting an iep at pH 2 and microcline charged negatively down to pH 1.5 is found to be the key factor for the preferential …Web
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The effect of diamine concentration on flotation of wollastonite is almost the same as the flotation of quartz with dodecylamine (Smith, 1988). This similarity may be due to the incongruent dissolution. Diffuse reflectance FT-IR studies. The reference DRIFT spectra of diamine and wollastonite without any treatment are shown in Fig. 6.Web
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The most favourable pH for the flotation of quartz in the size ranges under investigation was pH 9.0 for both types of amine used, ether monoamine and ether diamine. Ether monoamine was more efficient than ether diamine in the flotation of fine quartz. At higher pH levels, ether diamine yielded better results than ether monoamine in the case …Web
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In this study, flotation of phlogopite, biotite, and quartz (for comparison purposes) in the presence of Flotigam®EDA (EDA) (commercial ether monoamine collector), at pH 10 was investigated through the single mineral micro–flotation experiments. Adsorption behaviors were explored by the contact angle, residual surface tension measurements ...Web
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