Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Roland Kammel"'
Publikováno v:
Hydrometallurgy. 57:85-96
This paper describes the properties and leaching behaviour of a pentlandite concentrate mechanically activated by grinding in an attritor (stirring ball mill) in H2O for 15–60 min. It appears that mechanical activation brings about an increase in s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3098f96d509e45c1a9e282fd00874296
https://doi.org/10.1016/s0304-386x(00)00102-x
https://doi.org/10.1016/s0304-386x(00)00102-x
Publikováno v:
Hydrometallurgy. 47:297-307
In this study the physico-chemical transformations and leachability of antimony and mercury from tetrahedrite concentrate mechanically activated by intensive grinding in a planetary mill were investigated. It has appeared that the leaching of antimon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ab7a36d6e0b10f68cd511d0fe7a87041
https://doi.org/10.1016/s0304-386x(97)00054-6
https://doi.org/10.1016/s0304-386x(97)00054-6
Autor:
Hisaaki Fukushima, S. K. Gogia, Tetsuya Akiyama, Shigeo Kobayashi, Roland Kammel, Toshiaki Tsuru
Publikováno v:
Journal of Applied Electrochemistry. 27:209-214
Electrodeposition of zinc–iron-group metal alloys is carried out in a methanol bath. The effects of different parameters, such as bath composition and current density on current efficiency and alloy composition are investigated. Partial polarizatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f7d4bb67190c72dd243da21d58851a5
https://doi.org/10.1023/a:1018460109175
https://doi.org/10.1023/a:1018460109175
Publikováno v:
Hydrometallurgy. 43:367-377
The thiourea leaching of silver from a tetrahedrite concentrate mechanically activated in a planetary mill or an attritor was studied. It was found that the two types of equipment gave rise to different rates of new surface formation and of crystal s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca0e07115fec63e5598263527503af99
https://doi.org/10.1016/0304-386x(96)00015-1
https://doi.org/10.1016/0304-386x(96)00015-1
Autor:
Tomas Havlik, Roland Kammel
Publikováno v:
Minerals Engineering. 8:1125-1134
Leaching characteristics of chalcopyrite concentrate from Cuba were investigated in acidified FeCl 3 and acidified FeCl 3 + CCl 4 . Carbon tetrachloride was used as solvent for the elemental sulfur produced during leaching. The tests shows higher ext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::166652dd29f812df7410bef30f0653f1
https://doi.org/10.1016/0892-6875(95)00077-4
https://doi.org/10.1016/0892-6875(95)00077-4
Publikováno v:
Scripta Metallurgica et Materialia. 32:1357-1362
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25be09b429aceabfd2f65a3a5fcca06c
https://doi.org/10.1016/0956-716x(95)00171-q
https://doi.org/10.1016/0956-716x(95)00171-q
Publikováno v:
International Journal of Mineral Processing. 43:61-72
In this study the kinetic leaching characteristics of chalcopyrite concentrate from Cuba (32.3% Cu) were investigated with granularities − 315 + 200 μm as delivered. The value of the apparent activation energy was determined to EA = 55 ± 5 kJ/mol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd1eb921508d30fb03ab8c5c6e44c10f
https://doi.org/10.1016/0301-7516(94)00040-7
https://doi.org/10.1016/0301-7516(94)00040-7
Publikováno v:
ISIJ International. 33:1009-1015
Electrodeposition of Zn-iron-group metal binary alloys, which has been applied in the production of highly corrosion-resistant alloy plated steel sheet, was conducted from sulfate and chloride baths and the alloy deposition behavior was compared betw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa7d8461d6e92b533bf32d24ed524fea
https://doi.org/10.2355/isijinternational.33.1009
https://doi.org/10.2355/isijinternational.33.1009
Publikováno v:
Solar Energy Materials and Solar Cells. 26:269-276
We report on our studies to remove impurities such as Fe, Ca, Al, etc., from metallurgical grade silicon MG-Si using a combination of attrition grinding and leaching. The study was divided into two parts. First, impure MG-Si was leached under differe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e54acc0bea50711c3479b2669a692af2
https://doi.org/10.1016/0927-0248(92)90046-r
https://doi.org/10.1016/0927-0248(92)90046-r