selective flotation of scheelite from calcium minerals with patent us

CN105149107A - patents.google.com

The invention discloses an application of a phosphoric acid eater compound to flotation of calcium-containing minerals. The phosphoric acid eater compound replaces traditional water glass to serve as a calcite inhibitor for the flotation of the calcium-containing minerals. The phosphoric acid eater compound has a selective inhibiting effect on calcite, and is particularly …

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A Highly Selective Reagent Scheme for Scheelite Flotation ...

The flotation behaviors of PASP in the scheelite and calcite flotation using Pb–BHA complexes as the collector were investigated via pure mineral flotation experiments. The selective adsorption mechanisms of PASP on the scheelite and calcite surfaces were investigated via the zeta potential measurements, XPS measurements, and crystal chemistry …

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US Patent for Flotation of scheelite from calcite with a ...

Separation of calcite ore from other more valuable minerals such as scheelite (calcium tungstate) is effected by a flotation process in which there is used a flotation aid or frother, and a microbial based collector which is produced by growing a culture or mixture of cultures selected from the genus Pseudomonas and/or the genus Alcaligenes, on a hydrocarbon substrate.

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US Patent for Process for the selective froth-flotation of ...

A process for the selective froth-flotation of sulfidic, oxidic and salt-type minerals, whereby an ore is first wet ground to the flotation fineness to obtain a slurry and then the obtained slurry is prepared and froth-flotated. In addition to the collector agent a polysaccharide, lignosulfonate, quargum and/or a surface active additional chemical is used which prevents the collector agent ...

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Selective flotation of scheelite from calcium minerals ...

Edward and Nuim (1977) got a patent on the flotation of scheelite from a calcite ore with a microbial-based collector. Kovalenko and Yasyukevich (1954) suggested the use of sulfoxide as a collector for the separation of scheelite from barite.

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US Patent for Selective flotation of phosphate minerals ...

A method is disclosed for separating phosphate minerals from a mineral mixture, particularly from high-dolomite containing phosphate ores. The method involves conditioning the mineral mixture by contacting in an aqueous in environment with a collector in an amount sufficient for promoting flotation of phosphate minerals. The collector is a hydroxamate compound of the …

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(PDF) Froth flotation of scheelite – A review

The main objective was and remains the selective flotation of scheelite from other calcium-bearing minerals, ... Articles and patents related to …

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US4283017A - Selective flotation of ... - Google Patents

A process for beneficiating a finely ground ore containing sulfide minerals of copper and nickel by selective flotation to produce a copper concentrate and a copper-nickel concentrate comprises pulping the ore with water to form a slurry, conditioning the slurry with an aqueous solution of SO 2 (H 2 SO 3 ) equivalent to from about 2 to about 4.5 pounds of SO 2 per ton of dry ore for a …

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Selective flotation of scheelite from calcium minerals ...

A mechanism of depression of the calcium minerals through the selective complexing dissolution of calcium ions from the mineral surface was derived and explains the higher selectivity obtained in scheelite flotation when (NaPO 3 ) …

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Figure 4 from A novel flotation scheme: selective ...

DOI: 10.1007/s12598-017-0907-8 Corpus ID: 99956945. A novel flotation scheme: selective flotation of tungsten minerals from calcium minerals using Pb–BHA complexes in Shizhuyuan

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Selective flotation of scheelite from calcium minerals ...

The results obtained indicate that Na 4 P 2 O 7 and (NaPO 3) 6 were effective modifiers for the selective flotation of scheelite. The results of the batch flotation tests on mixtures of these minerals showed that the recovery of scheelite from scheelite-silicate mixtures (31% WO 3 ) with (NaPO 3 ) 6 or Na 4 P 2 O 7 increased by 20% as compared with sodium silicate and the …

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Froth flotation of scheelite – A review - ScienceDirect

Froth flotation of scheelite has regained new focus since the 2010s and research regarding floatability and reagents has made great progress over the years. The main objective was and remains the selective flotation of scheelite from other calcium-bearing minerals, in particular calcite, fluorite and apatite.

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Selective flotation of scheelite from calcite using ...

Minerals Engineering. Volume 119, April 2018, Pages 73-75. Short communication. Selective flotation of scheelite from calcite using calcium lignosulphonate as depressant. Author links open overlay panel Wei Chen Qiming Feng Guofan Zhang Dezhi Liu Longfei Li. Show more.

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US Patent for Selective flotation process for separation ...

Selective flotation process for separation of sulphide minerals Jun 28, 1993 - Falconbridge Ltd. This invention provides a process for improved separation of mono/multi-metallic sulphide minerals from significant amounts of iron sulphides, mainly pyrrhotite and/or their finely divided process middlings.

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New reagent formulations for selective flotation of ...

New reagent formulations for selective flotation of scheelite from a skarn ore with complex calcium minerals gangue L.O. Filippov a,⁎, Y. Foucaud a, I.V. Filippova a, M. Badawi b

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Selective flotation of scheelite from calcite using ...

Scheelite can be separated efficiently from scheelite-calcite mixed binary minerals in pH range of 7–11, when CLS was added prior to NaOl. The selective depressant effect of CLS on calcite was analyzed through interactions between the CLS micelles and mineral particles at water/particle interface.

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Separation of scheelite and calcite using calcium ...

Abstract The flotation separation of scheelite and calcite by froth flotation is difficulty as these two minerals have similar physicochemical characteristics. To solve this problem, the role of calcium lignosulphonate (CLS) in the flotation separation of scheelite from calcite has been studied and the separation mechanism has been discussed.

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Selective flotation of scheelite from calcite using ...

Selective flotation of scheelite from calcite using XANTHAN GUM (cas 1) as depressant Add time:07/18/2019 Source:sciencedirect.com XANTHAN GUM (cas 1 ) (XG), a clean, non-toxic macromolecular polysaccharide, was studied as a depressant in the flotation separation of scheelite from calcite.

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Selective flotation of scheelite from calcite using ...

Download Citation | Selective flotation of scheelite from calcite using calcium lignosulphonate as depressant | In this work, calcium lignosulphonate (CLS) was …

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Selective flotation of scheelite from calcium minerals ...

The results obtained indicate that Na4P2O7 and (NaPO3)6 were effective modifiers for the selective flotation of scheelite. The results of the batch flotation tests on mixtures of these minerals showed that the recovery of scheelite from scheelite-silicate mixtures (31% WO3) with (NaPO3)6 or Na4P2O7 increased by 20% as compared with sodium silicate and the WO3 …

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Selective flotation of scheelite from calcite using ...

Abstract In this work, calcium lignosulphonate (CLS) was introduced as a novel flotation depressant for separation of scheelite from calcite. Sodium oleate (NaOl) acted as collector for scheelite. The flotation results showed that CLS had strong depressant effect on calcite flotation while exhibited little influence on scheelite flotation.

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Minerals | Free Full-Text | Selective Separation of ...

The flotation separation of scheelite from calcite is problematic, where sodium silicate modified by polyvalent metal ions has shown some advantages for selective depression. In this study, an Al-Na2SiO3 polymer was used as the depressant for the flotation separation of scheelite from calcite using a lead complex of benzohydroxamic acid (Pb-BHA) as the collector.

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Interactive effect of minerals on complex ore flotation: A ...

Froth flotation is the most effective industrial method used to separate fine-grained minerals. The main problem of complex ore flotation is the negative effect of interactions among minerals in slurry, leading to variation in surface properties during separation. In this review, studies on the interactive effect among minerals on the flotation of iron ores, magnesite ores, …

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US Patent for Froth flotation of calcium borate minerals ...

Particles of a calcium borate mineral, such as colemanite or ulexite, are recovered from an ore by a froth flotation process using a dialkyl sulphosuccinate as collector. Suitable dialkyl sulphosuccinates include sodium or ammonium dinonyl sulphosuccinate, sodium or ammonium di-isodecyl sulphosuccinate, and sodium or ammonium dilauryl sulphosuccinate.

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Selective flotation of scheelite from calcite and fluorite ...

An attempt to improve the selectivity for the flotation of scheelite from calcite and fluorite was made using a collector mixture of MES and collector 733. The mechanism of the selective separation was investigated through zeta potential measurement. 2. Materials and methods 2.1. Pure minerals and reagents

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Recovery of scheelite from ores by flotation - ENGELHARD ...

The following patents disclose processes for floating scheelite from ores containing other calcium minerals wherein salts of heavy metals were used in conjunction with sodium silicate or sodium condensed phosphate dispersants to depress calcium carbonate and/or apatite minerals. U.s. 2,040,187 - rose et al. U.s. 2,140,485 - clemmer et al.

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Selective depression behavior of guar gum on talc-type ...

The flotation results for monominerals, mixed minerals, and actual mineral samples indicated that guar gum exhibited much higher selective depression for talc than for scheelite. Bench-scale closed-circuit tests showed that a tungsten concentrate with a WO 3 grade of 51.43% and a WO 3 recovery of 76.18% was obtained.

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US3915391A - Recovery of scheelite from ores by flotation ...

A flotation process for recovering scheelite (calcium tungstate) from a low grade slimey ore containing other calcareous minerals such as calcite is described. The scheelite is selectively flocculated by conditioning the ore pulp at a high pH, using intense agitation, usually prolonged, in the presence of predetermined quantities of a deflocculating agent, a source of polyvalent …

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Selective separation of scheelite from calcite using ...

Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A ... Selective separation of scheelite from calcite using tartaric acid and ... Subject: X-ray photoelectron spectroscopy, adsorption, calcite, calcium, lead, tartaric acid ...

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(PDF) New reagent formulations for selective flotation of ...

A study of depressants dosage allowed to reach a selective flotation of scheelite from calcium minerals at 1125 g/t, ... Patent speci fi cation 4488959 ... Selective fl …

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