Analysis of surface modification on coal pyrite for 20 minutes resulted in radiation damage to the surface proving that the cover had poor thermal stability The radiation oxidized the sulphur compounds to SO2 resulting in the rupture of the gold film After oxidation in air for 3 months the pyrite surface presented ‘corrosion pits’ of deeply... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.
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Analysis of surface modification on coal pyrite AUTHOR H Zhu HL Li Z Sh Ou DZ Wang file description Journal Paper Vol 102 No 05 Pg 315 page 315 Add comment Name required Email required but will not display Notify me of followup comments Send JComments
Sep 01 2019 · In order to uncover the effect of pyrite on the tendency of coal to spontaneously combust thermal analysis was carried out to characterize the reaction process of coal with different pyrite contents at four heating rates of 5 10 15 and 20 K min −1 in air flow from 25 to 900 °C The FlynnWallOzawa method was applied to calculate the activation energy of coal with different pyrite
Request PDF Surface Analysis Of Pyrite in the No 9 Coal Seam Wuda Coalfield Inner Mongolia China using HighResolution TimeofFlight Secondary Ion MassSpectrometry The chemical
Figure 2 is the releasing analysis of oxygen spectra Figure 1 and Figure 2 show that the main oxygen peak of protogenetic coal pyrite is 5317eVTable 2 which proves that FeSO is formed on the surface of coal pyrite Oxygen peak of epigenetic coalpyrite moves toward long wave mainly 53285eVTable 2 lack of 5345eV peak
Concomitantly the ash content of these coals is to be reduced to 6 or less Investigation of mechanisms for the control of coal and pyrite surfaces prior to fine coal flotation is an important aspect of the project objectives Large quantities of coal samples have been procured from six major seams
articleosti10143817 title Oxidation of coal and coal pyrite mechanisms and influence on surface characteristics Technical progress report December 31 1993 author Doyle FM abstractNote The objective of this research is to develop a mechanistic understanding of the oxidation of coal and coal pyrite and to correlate the intrinsic physical and chemical properties of these
In the limited samples analyzed the surfaces of the mineral pyrite tended to be smoother and the edges sharper than those for coal pyrite At 20000X the coal pyrite surface begins to appear smooth although submicron particles are still observed attached to the surfaces No porosity was observed at this level of analysis
Whatever the mechanism the bacterial modification of pyrite floatability is expected to be much faster than bioleaching of pyrite by the same bacteria This concept has been tested 1 on individual clean coal and pyrite samples The results are shown in Fig 1 Without bioconditioning about 90 of the coal
Oxidation of pyrite leads to the generation of various soluble inorganics that can adsorb on the coal surface and modify its wettability while pyrite itself was reported to show improved hydrophobicity upon oxidation Tao et al 1994 213 Effect of coal particle–promoter interactions on flotation