3 edition of Hydrolyzed Metal Ions as Pyrite Depressants in Coal Flotation found in the catalog.
Hydrolyzed Metal Ions as Pyrite Depressants in Coal Flotation
United States. Bureau of Mines.
|Series||Report of investigations (United States. Bureau of Mines) -- 7518|
|Contributions||Baker, A., Miller, K.|
&ER& United States Environmental Protection Agency Industrial Environmental Research Laboratory Cincinnati OH Research and Development EPA/S Oct. Project Summary Alternatives for Sodium Cyanide for Flotation Control E. J. Mezey, D. W. Neuendorf, G. Ray Smithson, Jr., and James F. Shea Cyanide has long been looked upon as the classical poison and has been . in South Africa for its Platinum Group Metal (PGM) content. Two of the main gangue minerals found in the ore are talc and chromite. The PGMs are separated from the ore by flotation. In this process unwanted minerals are also recovered. Talc is naturally hydrophobic and its flotation is depressed by polymeric depressants. Chromite is consideredFile Size: KB.
Flotation and Adsorption of a New Polysaccharide Depressant on Pyrite and Talc in the Presence of a Pre-Adsorbed Xanthate Collector Wei Deng 1,2, Longhua Xu 3,4,5,*, Jia Tian 2, Yuehua Hu 4 and Yuexin Han 1,* 1 College of Resources and Civil Engineering, Northeastern University, Shenyang , China; [email protected] Size: 2MB. The example of electrochemical flotation separation of sulphide ores shows an industrial application. Prof. Yuehua Hu is a professor at the School of Minerals Processing & Bioengineering of Central South University and Vice Chairman of the Mineral Processing Committee of .
The flotation tests of mineral show that in the presence of SGX, marmatite can be activated by Cu2+ and shows good flotability, while pyrite cannot be activated and therefore shows poor flotability. At the pH value range from 4 to 11, the flotation selectivity between marmatite and pyrite is obvious when the SGX concentration is below 50 mg/L. CHAPTER 7 EFFECT OF CONDITIONING PH ON FLOTATION 98 selective between sulphide and gangue, the hydroxide could have formed on pyrite, which is likely to depress it. For the iron ions that remained in solution, they can form a number of hydroxyl complexes with caustic. These are likely to affect pyrite flotation with xanthate.
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Additional Physical Format: Online version: Baker, A.F. Hydrolyzed metal ions as pyrite depressants in coal flotation.
[Washington, D.C.]: U.S. Dept of Interior. Hydrolyzed metal ions as pyrite depressants in coal flotation: a laboratory study [Baker, A. F.] on *FREE* shipping on qualifying offers. Hydrolyzed metal ions as pyrite depressants in coal flotation: a laboratory studyAuthor: A.
Baker. ASTM, b. Standard Test Method for Forms of Sulfur in Coal. Annual Book of ASTM Standards, Vol. (gaseous fuels; coal and coke). American Society for Testing and Materials, Standard No. D Baker, A.F. and Miller, K.J., Hydrolyzed Metal Ions as Pyrite Depressants in Coal Flotation: A Laboratory by: Flotation of copper at different alkaline pH from 7upto 10 and using different Xanthates as collector vs.
recovery of copper may give some clue. Minimum Pyrite obtained in copper concentrate is the starting point for further flotation test work. Depressing Pyrite is always a tricky matter.
The Pyrite Depression in a Copper Only Flotation circuit is simple enough. If your froth flotation system only tries to recover chalcopyrite-copper, you need to bring the plant’s pH up to the other side (right side) of the PYRITE curve. The more flotation collector you have on, the higher you will need to increase that pH for effective pyrite depression.
You also need to insure your pyrite. Introduction. Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, gold as well as coal (Wang and Forssberg,Wang,Dimitrijevic et al.,Jiang et al., ).Pyrite has very low economic significance and is usually removed from the valuable components by flotation and Cited by: EFFECT OF MULTIVALENT IONS ON COAL FLOTATION 80 0 ~ Flotation results indicate that PIONERA BioPolymers, at each dosage, significantly reduce pyrite than conventional pyrite depressants.
Additionally, conventional pyrite depressants such as sodium cyanide, sodium hydro sulfide and Nokes reagent are toxic, highly regulated, difficult to handle and present an overall costly alternative. Role of starch and metabisulphite on pure pyrite and pyritic copper ore flotation 43 occurred with mg/ dm3, while 21% depression occurred with the same dosages of starch at pH where pyrite flotation is expected to be weak at pH A suspension of pyrite at g/l was conditioned at a particular pH and equilibrated for one hour at room temperature (27–C).
Measurements were made on pyrite both in the absence and presence of different concentrations of guar gum or dextrin. Flotation tests.
Flotation tests were carried out using a modiﬁed Hallimond tube (20). Moreover, some organic depressants have been identified and synthesized for use as pyrite depressants in the flotation separation of metal sulfide minerals in a low-alkaline or low-acid medium.
METAL ION HYDROLYSIS AND SURFACE CHARGE IN BERYL FLOTAnON sulphonate is not chemisorbed on the surface. Similar results have been reported by Moir and Stevens The competition of the various anionic species for the surface is also reflected in the flotation data, the maximum recovery of about 50 per centFile Size: 1MB.
Xu et al () have investigated the effect of a number of clays on coal flotation. Figure 3 shows the effect of montmorillonite clays on coal flotation under acid and alkaline conditions.
Fig. The Effect of Clays on Coal Combustibles Recovery at pH 5 (left) and pH 10 (right) (Xu et al, ). Impact of ovalbumin on pyrite flotation in the absence and presence of metal ions 35 Metal ions did not significantly alter pyrite voltammograms (Fig.
1a) except slight changes in current flow rate. Then, percentage variation in anodic current by metal ions with respect to reference value of bare pyrite was also considered (Fig.
1b). However, in seawater, flotation of Cu-Mo ores requires removal of the hydrolysis products of the Mg²⁺ and Ca²⁺ ions or the use of a pyrite depressant that can be effective over the pH ranges.
In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS 2) from sphalerite (ZnS) and pyrite (FeS 2) using sodium isopropyl xanthate as a collector and 4-methylpentanol (MIBC) as a frother.
Flotation tests were carried out in a DDenver flotation laboratory cell in the presence and Cited by: 2. Sample Metal % Cu Pb Zn Fe Chalcopyrite Pyrite - Sphalerite - Galena XRF results show that except chalcopyrite and pyrite the other samples were highly pure; the major contaminating elements within the chalcopyrite sam-ple were zinc and lead.
The measured lead contentFile Size: KB. flotation mineral surface adsorption minerals collector sulfide collectors fig xanthate solution metal acid chemical ions ore iron concentration reagents polymer grinding potential ores effect sodium particles chain.
THE DEPRESSION OF QUARTZ IN SULPHIDE FLOTATION. BY W. BILLINGHURST. •., ___ __ A. TH~IS. submitted to the faculty of the. SCHOOL OF MINES. AND. UETALLUIDY OF Tim UNIVERSITY OF MISSOURI. in partial fulfillment of the work required for the Degree of. MASTER OF SCIENCE (UETALLUFGY).
-Rolla, Missouri Approved by-Cited by: 1. New flotation processes reviewed in this report are highly efficient and available competitively for the Australian Coal Industry. With commercial suppliers of new technology already well established, any new research, however prospective the ideas may be, is likely to return little or no benefit to the Industry.
Final report — 2/70 ( pp) Electrophoretlc - specific gravity separation of pyrlte from coal, laboratory study - 10/70 (15 pp) Hydrolyzed metal Ions as pyrlte depressants 1n coal flotation: a laboratory study — 5/71 (26 pp) An evaluation of coal cleaning processes and techniques for removing pyrltlc sulfur from fine coal — Final report.Mineral Biotechnology: Microbial Aspects of Mineral Beneficiation, Metal Extraction, and Environmental Control S.
Komar Kawatra, K. A. Natarajan Microorganisms can play a beneficial role in all facets of minerals processing, from mining to waste disposal and management.• Pyrite in the feed was Cu activated, and adsorbed xanthate even at high pH (>), becoming highly floatable • Limited pyrite depression was achieved by increasing the pH with lime • Na 2SO 3and DETA were effective in preventing/reversing the activation of pyrite in the presence of O2, reducing pyrite recovery by 50%.File Size: KB.