Modified hydroxamate collectors for kaolin flotation

Basilio, C.; Lowe, R.; Gorken, A.; Magliocco, L.; Hagy, R.

doi:10.1016/s0167-4528(00)80074-5

Cited by 6 publications

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“…In most of the china clay mines of India, the percentage of iron is high and difficult to remove by conventional mineral processing techniques (Kumar, 1994). Different mineral processing and acid leaching methods have been used to reduce the iron content of china clay by removal of iron-rich minerals, including size separation with hydrocyclones, high-intensity magnetic separation and flotation methods (Grim, 1968;Zhengnan & Veasey, 1988;Maurya & Dixit 1990;Basilio et al, 2000;Raghavan et al, 2004;Chandrasekhar & Ramaswamy, 2006). If the coloured impurities are not fully liberated from the clay particles, either because they are firmly adsorbed or are present in complex forms (Lee et al, 2002), removal by physical processing technologies is extremely difficult and chemical methods are being employed.…”

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Characterization and beneficiation studies for the removal of iron from a china clay from India

et al. 2013

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A china clay sample from Jharkhand State, India, containing 65.0 wt.% SiO2, 22.7% Al2O3, 1.77% Fe2O3and 9.10% LOI was subjected to physical beneficiation and acid leaching studies to improve its quality. The clay was characterized by optical microscopy, XRD, and wet chemical analysis methods. Quartz and goethite are the two major impurities. High intensity magnetic separation removed only 10% of the total iron. Experiments with oxalic acid were carried out to establish the leaching kinetics of iron and the effects of acid concentration, time and temperature on iron leaching were also examined. The study demonstrated that ∼90% of total iron could be removed using 5% oxalic acid. The dissolution of iron from clay is best described by diffusion of ions through the product layer of constant size spherical particles. The activation energy of the leaching process over the temperature range was calculated to be 51.14 kJ/mol.

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Characterization and beneficiation studies for the removal of iron from a china clay from India

et al. 2013

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Flocculating Agents

Heitner¹

2004

Kirk-Othmer Encyclopedia of Chemical Technology

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Flocculating agents are chemical additives that cause suspended solids to form aggregates called flocs. These agents are used in water treatment, municipal and industrial waste treatment, mineral processing, and papermaking. Flocculating agents are either inorganic salts or water‐soluble organic polymers. They act by shrinking the ionic double layer, or neutralizing the surface charge of suspended particles, or bridging between particles. The type of flocculant used depends on the type of solid–liquid separation being performed. The physical properties and size of the flocs as well as the rate of floc formation are the critical parameters in this process. Flocculants are usually selected by the results of laboratory‐scale experiments. The manner in which the flocculating agent is mixed with the substrate can affect the results. Special analytical methods are used for some flocculating agents. Some agents or impurities in them may present toxicological or environmental problems. The general economic trend is the replacement of inorganic salts with organic polymers, which give improved performance.

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Flotation behavior and adsorption mechanism of fine wolframite with octyl hydroxamic acid

Meng

Feng

2016

J. Cent. South Univ.

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Modified hydroxamate collectors for kaolin flotation

Cited by 6 publications

References 1 publication

Characterization and beneficiation studies for the removal of iron from a china clay from India

Characterization and beneficiation studies for the removal of iron from a china clay from India

Flocculating Agents

Flotation behavior and adsorption mechanism of fine wolframite with octyl hydroxamic acid

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