Extraction of rhenium from calcines of the oxidation roasting of low-grade molybdenite concentrate in a rotating tubular furnace

2007 ◽  
Vol 48 (2) ◽  
pp. 107-109 ◽  
Author(s):  
F. Sh. Balgaeva ◽  
A. S. Medvedev
Keyword(s):  
Low Grade ◽  
Tubular Furnace ◽  
Molybdenite Concentrate

scholarly journals Leaching molybdenum from a low-grade roasted molybdenite concentrate

2019 ◽  
Vol 1 (4) ◽  
Author(s):  
Ping Wang ◽  
Yajing Pan ◽  
Xiao Sun ◽  
Yongqiang Zhang
Keyword(s):  
Low Grade ◽  
Molybdenite Concentrate

Investigations on the extraction of molybdenum and rhenium values from low grade molybdenite concentrate

1996 ◽  
Vol 41 (2-3) ◽  
pp. 201-209 ◽  
Author(s):  
J.M. Juneja ◽  
Sohan Singh ◽  
D.K. Bose
Keyword(s):  
Low Grade ◽  
Molybdenite Concentrate

Studies on the processing of a low grade molybdenite concentrate by lime roasting

1988 ◽  
Vol 1 (4) ◽  
pp. 337-342 ◽  
Author(s):  
S. Singh ◽  
M.K. Chetty ◽  
J.M. Juneja ◽  
J.C. Sehra ◽  
C.K. Gupta
Keyword(s):  
Low Grade ◽  
Molybdenite Concentrate

scholarly journals Kinetics of the Oxidative Roasting of Low Grade Mongolian Molybdenite Concentrate

2009 ◽  
Vol 50 (11) ◽  
pp. 2669-2674 ◽  
Author(s):  
Byung-Su Kim ◽  
Hoo-In Lee ◽  
Young-Yoon Choi ◽  
Sangbae Kim
Keyword(s):  
Low Grade ◽  
Molybdenite Concentrate ◽  
Oxidative Roasting ◽  
Kinetics Of

Refining of a low-grade molybdenite concentrate

2007 ◽  
Vol 86 (1-2) ◽  
pp. 56-62 ◽  
Author(s):  
Manoj Kumar ◽  
T.R. Mankhand ◽  
D.S.R. Murthy ◽  
R. Mukhopadhyay ◽  
P.M. Prasad
Keyword(s):  
Low Grade ◽  
Molybdenite Concentrate

Intensified bioleaching of low-grade molybdenite concentrate by ferrous sulfate and pyrite

Rare Metals ◽  
2015 ◽  
Vol 34 (3) ◽  
pp. 207-214 ◽  
Author(s):  
Juan Yu ◽  
Hong-Ying Yang ◽  
Lin-Lin Tong ◽  
Jun Zhu
Keyword(s):  
Ferrous Sulfate ◽  
Low Grade ◽  
Molybdenite Concentrate

Direct Observation of Crystalline Ordering In Naturally Graphitized Carbon Produced by Low Grade Metamorphism

1977 ◽  
Vol 35 ◽  
pp. 162-163
Author(s):  
Thomas R. McKee ◽  
Peter R. Buseck
Keyword(s):  
Crystallite Size ◽  
Sedimentary Rocks ◽  
Carbonaceous Material ◽  
Low Grade ◽  
X Ray ◽  
Graphitized Carbon ◽  
Transmission Electron ◽  
Heat Treated ◽  
Commercial Carbon ◽  
Metamorphic Zone

Sediments commonly contain organic material which appears as refractory carbonaceous material in metamorphosed sedimentary rocks. Grew and others have shown that relative carbon content, crystallite size, X-ray crystallinity and development of well-ordered graphite crystal structure of the carbonaceous material increases with increasing metamorphic grade. The graphitization process is irreversible and appears to be continous from the amorphous to the completely graphitized stage. The most dramatic chemical and crystallographic changes take place within the chlorite metamorphic zone.The detailed X-ray investigation of crystallite size and crystalline ordering is complex and can best be investigated by other means such as high resolution transmission electron microscopy (HRTEM). The natural graphitization series is similar to that for heat-treated commercial carbon blacks, which have been successfully studied by HRTEM (Ban and others).

Scanning Electron Microscope Study of Bacteria on Mineral Surfaces

1976 ◽  
Vol 34 ◽  
pp. 130-131
Author(s):  
V.K. Berry
Keyword(s):  
Oxidation Reaction ◽  
Electron Microscope Study ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Physical Contact ◽  
Metal Sulfides ◽  
Low Grade ◽  
Mineral Surfaces ◽  
Mineral Surface ◽  
Scanning Electron Microscope Study

There are two strains of bacteria viz. Thiobacillus thiooxidansand Thiobacillus ferrooxidanswidely mentioned to play an important role in the leaching process of low-grade ores. Another strain used in this study is a thermophile and is designated Caldariella .These microorganisms are acidophilic chemosynthetic aerobic autotrophs and are capable of oxidizing many metal sulfides and elemental sulfur to sulfates and Fe2+ to Fe3+. The necessity of physical contact or attachment by bacteria to mineral surfaces during oxidation reaction has not been fairly established so far. Temple and Koehler reported that during oxidation of marcasite T. thiooxidanswere found concentrated on mineral surface. Schaeffer, et al. demonstrated that physical contact or attachment is essential for oxidation of sulfur.

Sign in / Sign up

Export Citation Format

Share Document