Mechanisms of Dodecylamine Flotation of Quartz: Mineral

2018-6-13  At low pH values the amine ions apparently adsorb as individual ions through coulombic interaction between the ion and the quartz surface. The surface coverage of amine ions is not great and only limited flotation takes place. As pH is raised adsorption of

Cationic Depression of Amine Flotation of Quartz

2003-3-3  electrolytes on the amine flotation of quartz is presented. Experimental data ob-tained for the amine flotation of quartz as a function of pH with potassium nitrate as depressant was used to test the models for the effectiveness of inorganic ions as depressants. The validity of commonly used assumptions are examined.

Selective Flotation of Quartz from Hematite by Amide

2021-7-30  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. Introduction The worldwide iron ore production in 2019 was 2.5 billion tons. It was primarily utilized by the steel

Selective Flotation of Quartz from Hematite by Amide

The selectivity window between quartz and hematite flotation using amide-amine was higher at pH 10.5 (approximately 80% for 5 mg/L). Therefore, the use of starch is not necessary in siliceous

Flotation separation of quartz from collophane using an

2017-8-1  The amine collector AY has been proven to be efficient for flotation separation of quartz against collophane. Micro-flotation of pure minerals indicates that there is an obvious floatability difference for quartz and collophane by using AY as a collector.

of Quartz by Columbia

2004-2-4  flotation decrease is also affected by polymer additions to the system. Polyacrylamide and Dodecylamine The effect of addition of polyacrylamide (PAM), a nonionic polymer, on quartz flotation at pH 6.5 using amine is illustrated in Figure 2. At 3.6xlO-S k rnol/m3 amine, PAM, which does ~ .~.~

Long-range hydrophobic forces in the amine flotation of

1997-5-1  A Mark IV surface force apparatus (SFA) was used to conduct direct force measurements between mica surfaces in dodecylamine hydrogen chloride collector solutions at varying pH levels. It was found that long-range hydrophobic forces reach a maximum at pH 9.5, which also corresponds to the maxima attained by the contact angle and flotation recovery of quartz. The charge densities are

FLOTATION OF QUARTZ AND HEMATITE: ADSORPTION

2012-11-22  The flotation response of quartz and hematite as a function of pH with cationic C. 12 . amine, anionic oleate and Sodium dodecyl sulphate collectors, is shown in Figure 3. The quartz flotation recoveries are presented at 5 10-5, 1 10-4. and 5 10-4. M initial C. 12 . amine, oleate and sodium dodecyl sulphate concentrations simultaneously

Flotation and adsorption of quartz with the new collector

2018-10-12  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 study, the flotation behaviors of quartz with BHLD were investigated by micro-flotation of quartz. It was found that the recovery of the quartz reaches 98.9%.

Mechanism of separating muscovite and quartz by

2014-8-29  3.1 Flotation behaviors of muscovite and quartz with three kinds of amine collectors The flotation recoveries of muscovite and quartz with DDA, TTA and DTAC as a function of pH are shown in Fig. (1). The concentration of each collector was 1×10-4 mol/L. It is evident from Fig. 1(a) that the flotation recoveries of muscovite using DDA and TTA

Cationic Depression of Amine Flotation of Quartz

2003-3-3  electrolytes on the amine flotation of quartz is presented. Experimental data ob-tained for the amine flotation of quartz as a function of pH with potassium nitrate as depressant was used to test the models for the effectiveness of inorganic ions as depressants. The validity of commonly used assumptions are examined.

Long-range hydrophobic forces in the amine flotation of

1997-5-1  A Mark IV surface force apparatus (SFA) was used to conduct direct force measurements between mica surfaces in dodecylamine hydrogen chloride collector solutions at varying pH levels. It was found that long-range hydrophobic forces reach a maximum at pH 9.5, which also corresponds to the maxima attained by the contact angle and flotation recovery of quartz. The charge densities are

Induction time measurements for the quartz—amine

Abstract An induction time apparatus which has a sensitivity limit of 100–150 μs has been constructed in the present work. The basic unit is similar to the one used by Eigeles and Volova and Trahar, but it operates with a microcomputer and has a greater sensitivity. Using this apparatus, the flotation chemistry of the quartz—amine system has been studied.

The effect of aluminum ions on the flotation of quartz

With an amine as the collec~tor, studies of the adsorption (abstraction) r f A l species on quartz surfaces. as a func.tiot7 ofpH, correlated well with the depressiotz of this mineral.

Effect of aluminum aqueous species on the amine flotation

reactivate quartz amine flotation, at least partially (see tests . 3, 4 . and . 5). The major problem is the low distribution of . quartz in the froth product, if these values are compared to .

Mechanism of separating muscovite and quartz by

2014-8-29  3.1 Flotation behaviors of muscovite and quartz with three kinds of amine collectors The flotation recoveries of muscovite and quartz with DDA, TTA and DTAC as a function of pH are shown in Fig. (1). The concentration of each collector was 1×10-4 mol/L. It is evident from Fig. 1(a) that the flotation recoveries of muscovite using DDA and TTA

(PDF) Flotation of Quartz and Hematite: Adsorption

The adsorption mechanism of mixed cationic C12 amine and anionic sulfate / oleate reagent schemes was examined through Hallimond flotation studies using pure quartz and hematite minerals. The

Effects of alkyl ether amine and calcium ions on fine

2018-10-1  However, the influences of complex flotation system on fine quartz flotation still need to be scrutinized. In this study, alkyl ether amine (Flotigam EDA-C from Clariant) was used as a collector for the flotation of quartz. It shows better collectability for the flotation of quartz at about pH 10.0 (±0.2).

Mechanism of separating muscovite and quartz by

2014-9-6  Flotation experiments were performed to investigate the separation of muscovite and quartz in the presence of dodecylamine (DDA), tallow amine (TTA) and dodecyltrimethylammonium bromide (DTAC). The adsorption mechanisms of these three kinds of amines on muscovite and quartz were studied by FT-IR spectrum analysis, contact angle measurement and molecular dynamics (MD)

A STUDY OF POLYMER/SURF ACT ANT INTERACTION AT

2004-2-4  flotation techniques. At pH 6.5, the polymer depresses amine flotation of quartz but without depressing amine adsorption on it. E]ectrokinetic experiments yielded zeta-potentia] values characteristic of the polymer as long as polymer ia adsorbed irreapective of both amine adsorption and original potentia] of quartz. Around pH 10 where amine is

Cationic Depression of Amine Flotation of Quartz

2003-3-3  electrolytes on the amine flotation of quartz is presented. Experimental data ob-tained for the amine flotation of quartz as a function of pH with potassium nitrate as depressant was used to test the models for the effectiveness of inorganic ions as depressants. The validity of commonly used assumptions are examined.

Induction time measurements for the quartz—amine

Abstract An induction time apparatus which has a sensitivity limit of 100–150 μs has been constructed in the present work. The basic unit is similar to the one used by Eigeles and Volova and Trahar, but it operates with a microcomputer and has a greater sensitivity. Using this apparatus, the flotation chemistry of the quartz—amine system has been studied.

Mechanism of separating muscovite and quartz by

2014-9-6  Flotation experiments were performed to investigate the separation of muscovite and quartz in the presence of dodecylamine (DDA), tallow amine (TTA) and dodecyltrimethylammonium bromide (DTAC). The adsorption mechanisms of these three kinds of amines on muscovite and quartz were studied by FT-IR spectrum analysis, contact angle measurement and molecular dynamics (MD)

Long-range hydrophobic forces in the amine flotation of

2021-8-26  A Mark IV surface force apparatus (SFA) was used to conduct direct force measurements between mica surfaces in dodecylamine hydrogen chloride collector solutions at varying pH levels. It was found that long-range hydrophobic forces reach a maximum at pH 9.5, which also corresponds to the maxima attained by the contact angle and flotation recovery of quartz. The charge densities are

ADSORPTION MECHANISM OF LONG-CHAIN

2020-5-6  3.1. Hallimond Flotation Studies . The flotation of quartz and albite as a function of C8, C12 and C16 amine chlorides at pH 6−7 are shown in Fig. 1. The flotation responses with C12 and C16 amine acetate salts also presented in the same figure. The effect of alkyl chain length on the flotation behaviour of quartz (Fig. 1A) observed to be

Flotation and adsorption of quartz with the new collector

A new surfactant butane-3-heptyloxy-1,2-diamine [CH 3 (CH 2 ) 6 OCH(CH 3 )CH(NH 2 )CH 2 NH 2 ; BHLD] was synthesized. It has been innovatively used as a collector in the flotation of quartz. In this present study, the flotation behaviors of quartz with BHLD were investigated by micro-flotation of quartz.

Mechanism of separating muscovite and quartz by flotation

Flotation experiments were performed to investigate the separation of muscovite and quartz in the presence of dodecylamine (DDA), tallow amine (TTA) and dodecyltrimethylammonium bromide (DTAC). The adsorption mechanisms of these three kinds of amines on muscovite and quartz were studied by FT-IR spectrum analysis, contact angle measurement and molecular dynamics (MD) simulation.

Flotation Of Quartz And Hematite: Adsorption Mechanism

The single mineral flotation tests in the presence of anionic collectors, quartz does not respond to flotation but the C12 amine flotation of quartz was observed to be pH and concentration dependent. It was observed that hematite flotation recovery is maximum at acidic pH with sodium dodecyl sulphate (SDS), neutral pH with oleate, and at basic

Flotation Chemistry and Technology of Nonsulfide Minerals

2012-6-18  Optimal adsorption of dodecyl amine and flotation of quartz are shown in Figure 5. D.W. Fuerstenau (1957) has explained the optimum flotation response to be due to hemim- icelle formation, with hemimicelle formation being facilitated by the coadsorption of neu­ tral amine molecules and aminium ions. Laskowski, Vurdela, and Liu (1988) have

A STUDY OF POLYMER/SURF ACT ANT INTERACTION AT

2004-2-4  flotation techniques. At pH 6.5, the polymer depresses amine flotation of quartz but without depressing amine adsorption on it. E]ectrokinetic experiments yielded zeta-potentia] values characteristic of the polymer as long as polymer ia adsorbed irreapective of both amine adsorption and original potentia] of quartz. Around pH 10 where amine is