Flotation of Heterocoagulated Particulates in Ulexite/SDS/Electrolyte System

Çelik, M.S.; Yasar, E.; El‐Shall, H.

doi:10.1006/jcis.1998.5478

Cited by 17 publications

(22 citation statements)

References 15 publications

(14 reference statements)

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“…These results may be explained on the basis of heterocoagulation between boron mineral, clay, and the precipitate [38]. This explanation is supported by the zeta potential measurements shown in Fig.…”

Section: Effect Of Clay Slimessupporting

confidence: 67%

“…It is reasonable to expect that the same increase in zeta potential is induced as results of both the precipitate and colemanite acquiring the same charge. Similar results of heterocoagulation in ulexite/SDS/electrolyte system clearly illustrated that under such conditions particles, precipitates and bubbles all become hydrophobic in the region of collector-metal ion precipitation and then coagulate due to hydrophobic interactions possibly in the form of structural forces [38]. The colloidal pre- cipitates composed of long-chain surfactants have been reported to be generally hydrophobic [50].…”

Section: Discussionmentioning

confidence: 67%

“…The role of electrostatic interactions in the flotation of most boron minerals and particularly on that of colemanite and ulexite was clearly illustrated elsewhere [19,38]. It is generally accepted that monovalent ions are indifferent electrolytes and thus only function in the compression of an electrical double layer; this compression ceases at about 1 M monovalent salt addition where the thickness of the electrical double layer is on the order of 1˚A.…”

Section: Discussionmentioning

confidence: 99%

“…The data show that both surfactants enhance the flotation of colemanite. While DAH exhibits a plateau with increasing salt concentration, SDS undergoes a maximum at salt concentrations corresponding to the precipitation-dissolution of the surfactant salt, particularly at high salt concentrations where precipitation of Ca(DS) 2 is inevitable [37][38][39].…”

Section: Effect Of Monovalent Saltsmentioning

confidence: 99%

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Surface Properties and Flotation Characteristics of Boron Minerals

Özdemir¹,

Çelik²

2010

TOMPJ

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Flotation of soluble salt minerals such as potash, trona and borax exhibits similarities because all are conducted in their brine solutions. The most commercially important boron minerals in the world are borax (Na 2 B 4 O 7 .10H 2 O), colemanite (Ca 2 B 6 O 11 .5H 2 O), ulexite (NaCaB 5 O 9 .8H 2 O), and kernite (Na 2 B 4 O 7 .4H 2 O). Most of them contain low grades when mined and must be upgraded by mineral processing techniques to commercially acceptable quality for the production of basic chemicals, such as boric acid. Boron minerals exhibit a spectrum of solubilities depending upon the cations in the lattice structure. Accordingly, a classification of semi-soluble (colemanite and ulexite) and soluble (borax and kernite) boron minerals may be appropriate as each class of minerals behaves differently in flotation. While borax has to be concentrated from its saturated brine, colemanite and ulexite can be recovered by flotation as is the case for other semi-soluble salt minerals. A common problem encountered in both classes of boron minerals is the presence of significant amounts of clay type minerals which adversely affect flotation recoveries in the form of slime coating. Despite the successful application of flotation technology in the potash industry, flotation has not yet been well developed for boron recovery. This may be attributed to inherent difficulties such as high ionic strengths, high viscosity brines, interaction of cations at the solid/liquid interface, and particularly the presence of clay minerals acting as persistent slimes. In this paper, we have reviewed the flotation chemistry studies on the interaction of boron minerals with anionic (sodium dodecylsulfate) and cationic (dodecylamine hydrochloride) surfactants along with the electrokinetics properties of boron minerals.

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Section: Effect Of Clay Slimessupporting

confidence: 67%

Section: Discussionmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Section: Effect Of Monovalent Saltsmentioning

confidence: 99%

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Surface Properties and Flotation Characteristics of Boron Minerals

Özdemir¹,

Çelik²

2010

TOMPJ

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“…It should be noted that the zeta potential of the pure Na-Bentonite was found to be -47.55 mV and increased to -10.56 mV with the addition of 3 % MgO. It is well known that Mg ions released from MgO can form MgOH complexes in solution and these hydoxy complexes can adsorb onto bentonite and make it more positively charged 3,27) . Heterocoagulation of bentonite with MgO particles becomes conducive most probably at zeta potentials in the vicinity of -15 mV where viscosity values exceed 12,000 cP.…”

Section: Production Of Na-bentonitementioning

confidence: 97%