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20080207000000.0 |
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100527e19891001iau st f0|||||eng|d |
| 035 |
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|a (TOE)ost6410499
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| 035 |
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|a (TOE)6410499
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| 040 |
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|a TOE
|c TOE
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| 049 |
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|a GDWR
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| 072 |
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|a 01
|2 edbsc
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| 086 |
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|a E 1.99:is-5010
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| 086 |
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|a E 1.99:is-5010
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| 245 |
0 |
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|a Chemical pretreatment of coal in a stirred ball mill
|h [electronic resource]
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| 260 |
|
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|a Ames, Iowa :
|b Ames Laboratory ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
|c 1989.
|
| 300 |
|
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|a Pages: (17 p) :
|b digital, PDF file.
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| 336 |
|
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|a text
|b txt
|2 rdacontent.
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| 337 |
|
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|a computer
|b c
|2 rdamedia.
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| 338 |
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|a online resource
|b cr
|2 rdacarrier.
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| 500 |
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|a Published through the Information Bridge: DOE Scientific and Technical Information.
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| 500 |
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|a 10/01/1989.
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| 500 |
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|a "is-5010"
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| 500 |
|
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|a "DE91004093"
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| 500 |
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|a Pollard, J.; Chmielewski, T.; Birlingmair, D.
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| 500 |
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|a DOE/FE.
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| 520 |
3 |
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|a Present studies on the electrochemical aspects of pyrite flotation in the presence of reducing agents were conducted to explain the effects observed during flotation of the separated organic and mineral-rich fractions of coal independently when sodium dithionite was used as an additive during and after grinding. In addition, the electrochemical phenomena occurring on the surface of pyrites of different origin was studied to aid in explaining the differences observed in the flotation of various coal-derived pyrite samples. Potentiometric and voltametric measurements have been conducted on electrodes prepared from natural pyrite samples of mineral and coal origin. Voltametric curves recorded on FeS₂ electrodes indicate the presence of elemental sulfur, iron-oxy, and iron-hydroxy compounds, even on the freshly prepared surfaces. Comparison of voltametric curves with results of potentiometric measurements show that in the presence of dithionite several electrochemical processes are expected to take place on the pyrite surface. Voltametric curves recorded in solutions of different pH with and without sodium dithionite demonstrate that pyrite is a very good electrocatalyst in the anodic oxidation of dithionite. 13 refs., 12 figs.
|
| 536 |
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|b W-7405-ENG-82.
|
| 650 |
|
7 |
|a Catalysts.
|2 local.
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| 650 |
|
7 |
|a Sulfides.
|2 local.
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| 650 |
|
7 |
|a Document Types.
|2 local.
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| 650 |
|
7 |
|a Reducing Agents.
|2 local.
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| 650 |
|
7 |
|a Coal Preparation.
|2 local.
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| 650 |
|
7 |
|a Separation Processes.
|2 local.
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| 650 |
|
7 |
|a Transition Element Compounds.
|2 local.
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| 650 |
|
7 |
|a Sodium Compounds.
|2 local.
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| 650 |
|
7 |
|a Voltametry.
|2 local.
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| 650 |
|
7 |
|a Electric Potential.
|2 local.
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| 650 |
|
7 |
|a Sulfur Compounds.
|2 local.
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| 650 |
|
7 |
|a Flotation.
|2 local.
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| 650 |
|
7 |
|a Fuels.
|2 local.
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| 650 |
|
7 |
|a Pyrite.
|2 local.
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| 650 |
|
7 |
|a Minerals.
|2 local.
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| 650 |
|
7 |
|a Electrodes.
|2 local.
|
| 650 |
|
7 |
|a Sulfide Minerals.
|2 local.
|
| 650 |
|
7 |
|a Energy Sources.
|2 local.
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| 650 |
|
7 |
|a Surface Properties.
|2 local.
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| 650 |
|
7 |
|a Materials.
|2 local.
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| 650 |
|
7 |
|a Coal.
|2 local.
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| 650 |
|
7 |
|a Machining.
|2 local.
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| 650 |
|
7 |
|a Progress Report.
|2 local.
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| 650 |
|
7 |
|a Iron Compounds.
|2 local.
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| 650 |
|
7 |
|a Comminution.
|2 local.
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| 650 |
|
7 |
|a Iron Sulfides.
|2 local.
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| 650 |
|
7 |
|a Ph Value.
|2 local.
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| 650 |
|
7 |
|a Carbonaceous Materials.
|2 local.
|
| 650 |
|
7 |
|a Additives.
|2 local.
|
| 650 |
|
7 |
|a Fossil Fuels.
|2 local.
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| 650 |
|
7 |
|a Electrocatalysts.
|2 local.
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| 650 |
|
7 |
|a Chemical Reactions.
|2 local.
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| 650 |
|
7 |
|a Alkali Metal Compounds.
|2 local.
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| 650 |
|
7 |
|a Grinding.
|2 local.
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| 650 |
|
7 |
|a Chalcogenides.
|2 local.
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| 650 |
|
7 |
|a Coal, Lignite, And Peat.
|2 edbsc.
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| 710 |
2 |
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|a Ames Laboratory.
|4 res.
|
| 710 |
1 |
|
|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
|
| 856 |
4 |
0 |
|u http://www.osti.gov/servlets/purl/6410499-NV1Ucu/
|z Online Access
|
| 907 |
|
|
|a .b59972609
|b 03-06-23
|c 05-28-10
|
| 998 |
|
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|a web
|b 05-28-10
|c f
|d m
|e p
|f eng
|g iau
|h 0
|i 1
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| 956 |
|
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|a Information bridge
|
| 999 |
f |
f |
|i 3a571345-35ca-5fe5-8976-5a2e2fa6f1eb
|s 8cfd9e8e-9c5a-5aba-9de7-5eb129f0bcd1
|
| 952 |
f |
f |
|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:is-5010
|h Superintendent of Documents classification
|i web
|n 1
|
