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Wednesday, August 5, 2020 | History

2 edition of Effect of potassium ethylxanthate degradation on flotation of chalcopyrite and molybdentie found in the catalog.

Effect of potassium ethylxanthate degradation on flotation of chalcopyrite and molybdentie

W. W. Simpson

Effect of potassium ethylxanthate degradation on flotation of chalcopyrite and molybdentie

by W. W. Simpson

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  • 22 Currently reading

Published by U.S. Dept. of the Interior, Bureau of Mines in [Avondale, Md.] .
Written in English

    Subjects:
  • Flotation.,
  • Chalcopyrite.,
  • Molybdenite.,
  • Potassium ethylxanthate -- Degradation.

  • Edition Notes

    Bibliography: p. 8.

    Statementby W.W. Simpson, I.L. Nichols, and J.L. Huiatt.
    SeriesReport of investigations ;, 8787, Report of investigations (United States. Bureau of Mines) ;, 8787.
    ContributionsNichols, I. L., Huiatt, J. L.
    Classifications
    LC ClassificationsTN23 .U43 no. 8787, TN523 .U43 no. 8787
    The Physical Object
    Pagination8 p. :
    ID Numbers
    Open LibraryOL2815856M
    LC Control Number83600124

    Thus, the results indicate that the simultaneous effect of the homogenizer and the ultrasonic treatment during the rougher flotation selectively separates chalcopyrite but does not affect the pyrite. Furthermore, by lowering the power of the homogenizer from kW to kW, the chalcopyrite SI value promotes %, which is in line with the.   Effect of Collector Concentration on Flotation Recovery. Xanthates are the salts of xanthic acid (alkyl/aryl dithiocarbonic acid) and are formed through the replacement of two oxygen atoms in carbonic acid by sulfur and replacement of one hydrogen atom by an alkyl/aryl group. 22 They are commonly used as a standard collector for sulfide minerals, and their collecting power varies with C.

    Effect of Potassium Ferrate Dosages. Different concentrations of potassium ferrate solution was added into the reaction solution, studying the effect of potassium ferrate dosages on degradation of sulfa antibiotics by Fe(VI)-US; the experimental results are shown in Figure 4. Disclosed is a process for the concentration of sulfide ore wherein an aqueous slurry of sulfide ore particles are subjected to sulfide ore froth flotation under sulfide ore froth flotation conditions. The improvement in process comprises using an effective amount of a frothing agent selected from the group consisting of: (a) the reaction product of a C 5 -C 10 diol and a C 1 -C 7 carboxylic.

    Search term: "potassium ethyl xanthate" Compare Products: Select up to 4 products. *Please select more than one item to compare. 3 matches found for potassium ethyl xanthate. Advanced Search | Structure Search. DITHIOCARBONIC ACID O-ETHYL ESTER, POTASSIUM SALT . The reactions of potassium ethyl xanthate (KEtX) and its oxidation product diethyl dixanthogen (EtX)₂ were studied in neutral and mildly alkaline aqueous solution. Dissolved oxygen-was shown to be ineffective in oxidizing KEtX in homogeneous systems (solution), but (EtX)₂ was produced electrochemically at a platinum electrode by application of a small anodic overpotential. A slow.


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Effect of potassium ethylxanthate degradation on flotation of chalcopyrite and molybdentie by W. W. Simpson Download PDF EPUB FB2

Effect of potassium ethylxanthate degradation on flotation of chalcopyrite and molybdentie. [Avondale, Md.]: U.S. Dept. of the Interior, Bureau of Mines, [] (OCoLC) The purpose of this investigation is to verify the presence of KTTC in flotation water and to determine the effect KTTC has on the flotation of a copper-molybdenum sulfide system.

Experimental Methods Materials. Pure molybdenite and chalcopyrite minerals, obtained from a commercial source, were used in the Hallimond tube flotation tests. Effect of oxidation treatment using hydrogen peroxide (H 2 O 2) on the floatability of copper sulfide minerals (i.e., chalcopyrite and bornite) and arsenic-bearing copper minerals (i.e., tennantite and enargite) is reported in this mineral flotation shows that the floatability of each mineral significantly decreases after the oxidation by: 1.

Particle size is a very important factor affecting flotation properties of molybdenite. In porphyry copper–molybdenite ores the flotation conditions (grinding, reagents, bubble size, etc.) all are optimized with respect to Cu and not Mo.

Fig. 2 shows that the optimum flotation particle size for molybdenite is around 20 μm, and the size fraction μm exhibits the lowest recovery and Cited by: PDF | Effect of oxidation treatment using hydrogen peroxide (H2O2) on the floatability of copper sulfide minerals (i.e., chalcopyrite and bornite) and | Find, read and cite all the research you.

Effect of Potassium Ethylxanthate Degradation. This effect was confirmed in flotation tests on porphyry copper ores. Under similar test conditions using pure molybdenite, the results showed that both KEX and KTTC act as depressants for molybdenite.

This depression effect was overcome by small additions of fuel oil. Potassium ethyl xanthate (KEX) is an organosulfur compound with the chemical formula CH 3 CH 2 OCS 2 K. It is a pale yellow powder that is used in the mining industry for the separation of the related sodium ethyl xanthate, the potassium salt exists as an anhydrous salt.

The effect of kerosene as a molybdenite collector has also been investigated to assess its potential in the selective flotation of molybdenite and chalcopyrite in artificial seawater. View Show. The effect of six lignosulfonates on the Hallimond tube flotation of chalcopyrite and molybdenite was studied as a function of pH, with the use of common pH modifiers (soda ash, potassium.

Inhibition of Acidithiobacillus ferrooxidans Fe 2+ oxidation by flotation chemicals shows that potassium ethyl xanthate is the most toxic (Tuovinen, ) and the effect of xanthates on chalcopyrite leaching by A.

ferrooxidans has been reported with different results (Loon and Madgwick,Valdivia and Chaves, ). The use of thermophiles. Title: The effect of lignosulfonates on the floatability of molybdenite and chalcopyrite: Creator: Ansari, Anita: Date Issued: Description: The applicability of six lignosulfonates as selective depressants in chalcopyritemolybdenite separation was assessed by means of modified Hallimond tube flotation tests, supplemented by adsorption studies to determine the magnitude of.

During flotation the deleterious effect of active carbonaceous matter includes difficult separation from sulphides due to similar flotation response, while during gold extraction active carbonaceous matter can adsorb on surfaces of leached gold (preg robbing), hence reducing gold recovery (Pugh,Afenya,Pyke et al.,Allan and.

Request PDF | Investigation into the flotation response of refractory molybdenum ore to depressant mixtures: A case study | In this paper, bulk flotation followed by separation was investigated to. Potassium ethyl xanthate (KEX, purity 85%, CH 3 CH 2 OCS 2 K, MW g mol −1) was purchased from Alkemin (85%, Michoacan, Mexico).The degradation chemicals were potassium ethyl thiocarbonate (KETC), ammonium ethyl perxanthate (NH 4 EPX), and tetrabutylammonium ethyl xanthyl thiosulfate (TBAEXT).

They were synthesized according to the technique described by Hao et. The degradation behavior of ethyl xanthate (EX) salt was the most widely used collector in sulfide mineral flotation and emission of flotation tailings with residual EX was harmful to environment.

In this work, hydrogen peroxide (H2O2) was investigated by UV-visible spectroscopy (UV/Vis) at different pH values from 3 to For pH value from 5 to 12, EX was oxidized into ethyl per xanthate.

Synopsis. This paper presents both the fundamentals of sulphide mineral flotation and the practical aspects of sulphide ore flotation. The fundamental aspects of the flotation of sulphide minerals both in the absence and presence of thiol collectors are discussed in relation to their crystal structure, surface chemistry and electrochemical characteristics.

The effect of flotation collectors on the electrochemical dissolution of gold during cyanidation. Minerals Engineering, DOI: / Ignacio Pedre, Fernando Battaglini, Graciela A.

González. Disposable Electrochemical Sensor for Rapid Determination of Ethyl Xanthate in the Mining Industry. The structure of the xanthates’ hydrocarbon (C–H) chain is one of the major factors which affect flotation recovery. The effectiveness and the collecting power of xanthates increase with increasing chain length and vary depending on the chain structure: branched and straight chains.

In this regard, the influences of length (2–5 carbon) and structure (straight: normal and branched: iso. The contact angle measurements indicated that PAHs, as a synergistic component of a composite collector, could adsorb on the edges of molybdenite in the presence of Ca 2+ by forming PAHs-Ca 2+-MoO 4 2− structure to increase the contact angle of fine molybdenite particle and reduce the deleterious effects of Ca 2+ on the flotation of molybdenite.

effect of pH value and concentration of H2O2 on degradation kinetics of EX was also discussed. 2 Materials and methods Materials The solid powder of sodium ethyl xanthate (SEX) was purchased from Qingdao Ruchang Mining Industry CO., Ltd.

(China). It. Flotation using sea water has been intensively studied over the years, and two papers, from China and Japan looked at the flotation of copper, and chalcopyrite-molybdenum separation in sea water.

A third paper, from Chile, described how the bacterium Acidithiobacillus ferrooxidans has shown to be a good depressant of pyrite in seawater flotation.Metallurgical ContentThe potash processing flowsheetCommon Salt or Halite: NaCl Crushing SectionScrubbing and DeslimingGrinding and ClassificationConditioningPotash.Figure 1: The flotation system includes many interrelated components, and changes in one area will produce compensating effects in other areas (Klimpel, ) Froth flotation is a good example of an engineering “system”, in that the various important parameters are highly inter-related, as .