3 edition of Coal-pyrite flotation in concentrated pulp found in the catalog.
Coal-pyrite flotation in concentrated pulp
Kenneth J. Miller
|Statement||by Kenneth J. Miller|
|Series||Report of investigations - Bureau of Mines ; 8239|
|Contributions||United States. Bureau of Mines|
|The Physical Object|
|Pagination||, 12 p. :|
|Number of Pages||12|
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.
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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. D. 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).