Results 31 to 40 of about 45,354 (192)

A new stylolite classification scheme to estimate compaction and local permeability variations [PDF]

open access: yes, 2017
This study was carried out within the framework of DGMK (German Society for Petroleum and Coal Science and Technology) research project 718 “Mineral Vein Dynamics Modeling”, which is funded by the companies ExxonMobil Production Deutschland GmbH, GDF ...
Beaudoin, Nicolas   +5 more
core   +1 more source

Study on the flotation technology and adsorption mechanism of galena–jamesonite separation

open access: yesInternational Journal of Mining Science and Technology, 2015
In order to further separate the concentrate containing galena and jamesonite before undergoing hydrometallurgical process, flotation experiment was performed on the basis of mineralogical analysis.
Wei Sun   +3 more
doaj   +1 more source

Application of Mixed Potential Theory to Leaching of Mineral Phases

open access: yesReactions, 2022
Leaching is a central unit operation in the hydrometallurgical processing of minerals, which often occurs by means of electrochemical reactions. Application of mixed potential theory to explain the kinetics of oxidative and reductive leaching processes ...
César A. C. Sequeira
doaj   +1 more source

Study of the thermal conductivity of PbS, CuFeS2, ZnS

open access: yesКонденсированные среды и межфазные границы, 2020
It is necessary to know the values of the thermal conductivity coeffi cient of a semiconductor material to assess the possibility of its application as a thermoelectric. The thermal conductivity of natural minerals of galena (PbS), chalcopyrite (CuFeS2),
Pavel A. Popov   +5 more
doaj   +1 more source

Comparative analysis of spring flood risk reduction measures in Alaska, United States and the Sakha Republic, Russia [PDF]

open access: yes, 2017
Thesis (Ph.D.) University of Alaska Fairbanks, 2017River ice thaw and breakup are an annual springtime phenomena in the North. Depending on regional weather patterns and river morphology, breakups can result in catastrophic floods in exposed and ...
Kontar, Yekaterina Yevgenevna   +1 more
core  

Structures of sulfide melt crystallization as an indication of metamorphism of the ores in the Oleninskoe gold deposit

open access: yesVestnik MGTU, 2020
Multiphase fine aggregates of galena, pyrrhotite, freibergite, pyrargyrite, diaphorite, fizelyite, uchucchacuaite, ullmanite, and some other minerals are found in the ores of the Oleninskoe gold deposit in the Kolmozero-Voronya greenstone belt (Kola ...
Kalinin A. A., Savchenko Y. E.
doaj   +1 more source

Lead, zinc and copper mineralisation in basal Carboniferous sediments at Westwater, south Scotland [PDF]

open access: yes, 1977
A zioneo f lead, zinc and copperm ineralisatioins developedo ver a minimum I of 4 km of strikeo f basal Carboniferoucse mentstoneg roup sedimentsa nd immediatelyu nderlyingB irrenswarkL avas atwestwater,n ear Laqholm in south Scotland.
Davies, A.   +5 more
core  

Ferric chloride leaching of the Delta sulfide ores and gold extraction from the leaching residue [PDF]

open access: yes, 1988
Conventional differential and bulk flotation processes have difficulties in achieving high recoveries with acceptable grades far zinc, lead and copper from the complex sulfide ores found at Tok, Alaska.
Lin, H.K., Rao, P.D.
core  

Study on low-grade galena-barite ore beneficiation in Khuzdar, Balochistan, Pakistan [PDF]

open access: yes, 2019
Purpose. Galena and barite are the principal minerals of lead and barium respectively. Both minerals are used extensively in industries because of their distinct properties.
Bashir, F   +6 more
core   +1 more source

Study of Galena Ore Powder Sintering and Its Microstructure

open access: yesMetals
Galena is a natural mineral enriched with lead sulfide (PbS). It typically forms in hydrothermal veins associated with igneous rocks and can also occur as a gangue mineral in other ore deposits.
Bety S. Al-Saqarat   +10 more
doaj   +1 more source

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