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Saturday, April 25, 2020 | History

2 edition of Coal-pyrite flotation in concentrated pulp found in the catalog.

Coal-pyrite flotation in concentrated pulp

Kenneth J. Miller

Coal-pyrite flotation in concentrated pulp

a pilot plant study

by Kenneth J. Miller

  • 3 Want to read
  • 11 Currently reading

Published by Dept. of the Interior, Bureau of Mines in [Washington] .
Written in English

    Subjects:
  • Coal preparation.,
  • Desulfurization.,
  • Coal -- Sulfur content.,
  • Flotation.

  • Edition Notes

    Statementby Kenneth J. Miller.
    SeriesReport of investigations - Bureau of Mines ; 8239
    ContributionsUnited States. Bureau of Mines
    The Physical Object
    Pagination[3], 12 p. :
    Number of Pages12
    ID Numbers
    Open LibraryOL22419188M

    The high intensity of the Jameson Cell means that it is much shorter than conventional column flotation cells (see Figure 1), and it does not require air compressors to aerate the suspension of ground ore particles and water (known as a slurry or pulp) in the flotation cell. The lack of a requirement for compressed air and the lack of moving parts means that power consumption is .   A process of separating copper minerals from pyrite wherein a flotation concentrate containing copper minerals and pyrite is reground in the presence of lime and subsequently conditioned at a pH of or more for a predetermined period sufficient to depress the pyrite, with optional additions of sulf-hydryl collector, cyanide and dispersing agent, and the conditioned pulp . Similar data are also available for pulp bleaching. Idea of blow heat recovery system has been incorporated with a schematic diagram. Treatment of imported (purchased) pulp has been also taken care of and way for mixing with short fiber has been indicated. Paper from rag pulp is now a days a forgotten story. It is only used for currency paper. History. William Haynes in patented a process for separating sulfide and gangue minerals using oil and called it bulk-oil flotation.. The first successful commercial flotation process for mineral sulphides was invented by Frank Elmore [1] who worked on the development with his brother, Stanley. The Glasdir copper mine at Llanelltyd, near Dolgellau in North Wales was .


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Coal-pyrite flotation in concentrated pulp by Kenneth J. Miller Download PDF EPUB FB2

Coal-pyrite flotation in concentrated pulp. [Washington]: Dept. of the Interior, Bureau of Mines, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: Kenneth J Miller; United States.

Bureau of Mines. Coal-pyrite flotation: a modified technique using concentrated second-stage pulp Kenneth J Miller ; United States.

Results of the pilot plant flotation tests showed that substantial sulfur reduction could be achieved by flotation with undiluted pulp but some dilution is recommended for maximum selectivity. For example, coal-pyrite flotation in slurry of 25 percent solids yielded clean coal products analyzing as low as percent pyritic sulfur and froth reject products containing slightly over percent pyritic sulfur.

Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link) http Author: Kenneth J. Miller. Purchase Coal Flotation and Fine Coal Utilization, Volume 14 - 1st Edition.

Print Book & E-Book. ISBNBook Edition: 1. Pyrite recovery mechanisms in coal flotation. Abstract. In most operating coal-cleaning plants, a significant amount of pyrite is recovered in the froth during flotation of high-sulfur coal.

This pyrite recovery is commonly believed to be a result of pyrite particles floating Cited by: If the concentration of coal in the flotation pulp were around 5% as is the case in coal flotation practice, the aggregation should be expected to be much more severe.

The inset graph in the same figure shows the deleterious effect of oil addition on the selectivity in relation to aggregation in the flotation by: flotation and pulp potential. The e ect of pH on sulphide flotation examined paying particular attention to the pulp potentials involved.

Key words: pH, Flotation, Electrochemical potential, Electrode, Sulphide minerals. Introduction The potential di erence of a mineral-solution inter-face, which is indicated by pulp potential, has beenFile Size: KB.

Complex sulfide ores are concentrated mainly through flotation. Sulfide mineral s are semi- conductors, and pyrite is the major gangue mineral associa ted with these ores. Effect of oxidation on flotation and electrokinetic properties of coal J.

Min. Met. 42 A () 73 The IEP of coal is about pH and that of the alumo-silicate minerals is about pH Figure 1 shows that coal-pyrite's isoelectric point (IEP) is at about pH of Since the pH iep of non-oxidized pyrite has beenCited by: Flotation reagents 36 Pulp density 38 Pulp pH 39 Agitator speed 39 Separation of Pyrite from Coal 40 Wet oxidation pretreatment 41 Ultrasonic vibration 44 Chemical comminution 46 Micro-bubble flotation 48 Kinetics of Coal Flotation 51 EXPERIMENTAL CONDITIONS 54 Experimental Apparatus and Procedures 54 Froth flotation test FLOTATION Flotation is the most widely used mineral separation method.

in the concentrate froth when it passes over the froth lip of the flotation cell. Particles can become entrainment from the pulp phase immediately below the pulp-froth interface on the top of the pulp. A Kinetic Model for FlotationFile Size: 1MB. Coal-pyrite flotation: a modified technique using concentrated second-stage pulp / By Kenneth J.

Miller, United States. Bureau of Mines. Technical Progress Report. and United States. Topics: Flotation., Coal preparation. The Bureau of Mines two-stage coal-pyrite flotation process was modified to provide a more concentrated final clean coal slurry underflow that could be dewatered economically by filtration or centrifugation.

This was accomplished by doing the first-stage coal flotation. Handbook of Flotation Reagents Chemistry, Theory and Practice: Flotation of Sulfide Ores by Srdjan M.

Bulatovic • ISBN: • Publisher: Elsevier Science & Technology Books • Pub. Date: April At the other end of the flotation size-range, the surface characteristics of all particles in the pulp are more similar at very fine sizes.

Somewhere below 10μ, and for most ores at about 3μ to 5μ, it becomes increasingly difficult to control and exploit differences in surface properties with the accuracy needed to depress gangue, and float Cited by: 4.

1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry.

The particles with attached air bubbles are then carried to the surface andFile Size: KB. In the pH range of –, coal pyrite can be recovered 31–43%, whereas mineral matter pyrite can be achieved to regain 99% over the same pH range.

Kawatra carried out microscopic examination of coal pyrite flotation and resulted in floated materials that were coal and locked coal/pyrite particles. The optimum solids content of the pulp is 35%, because by increasing the pulp density, more particles report to the concentrate and increase copper recovery (also reducing concentrate grade).

Drawing on the literature in the flotation area, a dependence of mineral recovery upon pulp density can be seen [ 24, 26, 32 ].Cited by: 3. Pyrite has long been used as a source of sulphur, and its recovery as a by-product from the flotation of certain base metal ores is a well established practice.

Large tonnages of mill tailings which have accumulated as a result of various milling operations frequently contain significant amounts of pyrite.

In many instances these tailings can be treated to yield pyrite concentrates. The bubbles of air, sucked or blown into the pulp in the flotation machines, become coated with mineral and rise to the surface where they collect in the form of a mineralized froth.

This primary concentrate, in which the bulk of the mineral is collected, continuously flows or is scraped over the lip of the machine into a collecting launder. Coal Flotation and Fine Coal Utilization by J. Laskowski,available at Book Depository with free delivery : J.

Laskowski. Flotation of a North Carolina Pyrophyllite Ore (Washington: U.S. Dept. of the Interior, Bureau of Mines, ), by F. Lamb and John Ruppert (page images at HathiTrust) Coal-Pyrite Flotation in Concentrated Pulp: A Pilot Plant Study (Bureau of Mines Report of Investigations #, ), by Kenneth J.

Miller (page images at HathiTrust). Flotation Reagents Three types of chemical reagents used during the froth flotation process •Collectors •Frothers •Modifiers Collectors These are surface active agents that are added to the flotation pulp where they adsorbs selectively on the surface of the particles and render them hydrophobic.

Froth Flotation: A Century of Innovation comprehensively describes the state-of-the-art research and practice in mineral froth flotation as known and practiced a century after its introduction.

Recognized experts from around the world provide in-depth coverage on the historical aspects of flotation; flotation fundamentals; flotation chemistry; flotation cells, modeling, and 5/5(4).

The Bureau of Mines two-stage coal-pyrite flotation process was modified to provide a more concentrated final clean coal slurry underflow that could be. The response of many minerals to the flotation process is often dramatically affected by pH.

Flotation circuits are often operated at a pH range of to The exact range at any given plant is optimized for the ore at that site. Lime is often used to raise the pH of the pulp and also reduce the flotation of iron pyrite.

Particle Size. Author: Jan Leja; Publisher: Springer Science & Business Media ISBN: Category: Science Page: View: DOWNLOAD NOW» The process of froth flotation is an outstanding example of applied surface chemistry. It is extensively used in the mining, mineral, metallurgical, and chemical industries for separation and selective concentration of individual.

rational gold mining grinding machine; grinding steel balls manufacturer usa; silica sand mining equipment; tum mill jao gaye mujha adeo; double toggle crusher loc za.

More complex flotation circuits have several sets of cleaner and re-cleaner cells, and intermediate regrinding of pulp or concentrate.

FLOTATION REAGENTS A composition and process are provided for the recovery of the values of zinc, molybdenum, copper, lead, iron (pyrite), and iron-containing small amounts of gold or uranium, or both, from ores.

Advanced Flotation Technology Eriez Flotation Division. Eriez Flotation Division has also made significant advances in fine coal recovery with flotation systems to recover classified and unclassified coal fines. The group's flotation columns are used extensively in many major coal preparation plants in North America and internationally.

Mineral processing can involve four general types of unit operation: Froth flotation cells used to concentrate copper and nickel sulfide minerals, Falconbridge, Ontario.

In flotation, bubbles are introduced into a pulp and the bubbles rise through the pulp. In the process, hydrophobic particles become bound to the surface of the bubbles. Estimated Water Requirements for the Conventional Flotation of Copper Ores.

By Donald I. Bleiwas. Introduction. This report provides a perspective on the amount of water used by a conventional copper flotation plant, including the makeup water required to compensate for water losses.

Much of the globalFile Size: KB. umn flotation technologies and the advanced flotation washability (AFW) analysison the basisof (A) productash and (B) total sulfur contents (feed ash: %; total sulfur: ). (Mohanty and Honaker (), courtesy of Elsevier Science.) larger volume machines (ft3 or 84 m3).

For coal Sotation, mechanical cells are usually arranged inFile Size: KB. Mineral Processing Technology. Rao, Vibhuti N. Misra. I used this book for my report in Magnetic separation and i found it very helpful.

It explains everything necessary to know in detail and the diagrams are also very useful and they make understanding much easier. Awesome book. Flotation Studies on NonCoking Coal of South /5(2). Froth flotation is a process for selectively separating hydrophobic materials from is used in mineral processing, paper recycling and waste-water treatment industries.

Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century. WEMCO® SmartCell™ Flotation Wemco has long been a trusted and proven leader in flotation technology under the FLSmidth Dorr-Oliver Eimco brand.

The SmartCell Flotation series combines the proven Wemco mechanism with cylindrical cells to optimize energy input, aeration, and mixing.

This configuration reduces pulp. Coal Flotation and Fine Coal Utilization by J. Laskowski (Author) ISBN ISBN Why is ISBN important. ISBN. This bar-code number lets you verify that you're getting exactly the right version or edition of a book Cited by: Froth flotation of Aljustrel sulphide complex ore chalcopyrite promoter was added and two minutes later the frother was added.

One minute later, the air valve was opened and flotation started with the first concentrate collection lasted three minutes. Next, the air valve was closed, pH adjusted and the promoter Size: KB.

covery ofgold by flotation from gravity concentrates. AtVillage Main, agravity concentrate is'redressed' on ashaking table, and the cleaned concentrate isfloated withafrother anddithiophosphate Therecovery from theflotation is98percent,andtheflotation concentrate canbesmelted directly toyield abullion averaging parts Size: KB.

@article{osti_, title = {Coal desulfurization by bacterial treatment and column flotation. Final report}, author = {Kawatra, S K}, abstractNote = {A review of the literature showed that bacterial leaching, using the microorganism Thiobacillus ferrooxidans, was a very effective technique for removing pyrite from coal, as it could dissolve even the finest pyrite particles Author: S.K.

Kawatra.The scavenger pulp is usually barren enough to be discarded as tails. More complex flotation circuits have several sets of cleaner and re-cleaner cells, and intermediate re-grinding of pulp or concentrate.

Flotation circuit design philosophy Keep it simple: Avoid, when possible, unit operation with long time delays, such as thickeners.5/5(3).A process of separating copper minerals from pyrite wherein a flotation concentrate containing copper minerals and pyrite is reground in the presence of lime and subsequently conditioned at a pH of or more for a predetermined period sufficient to depress the pyrite, with optional additions of sulf-hydryl collector, cyanide and dispersing agent, and the conditioned pulp is Cited by: 6.