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Eastern-European Journal of Enterprise Technologies
Article . 2017 . Peer-reviewed
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A study of environmentally safe obtaining of molybdenum-based alloying material by solid phase extraction

Authors: Hryhoriev, Stanislav; Petryshchev, Artem; Krupey, Kristina; Andreev, Andrey; Katschan, Alexander; Stepanov, Dmytro; Manidina, Yevheniia; +3 Authors

A study of environmentally safe obtaining of molybdenum-based alloying material by solid phase extraction

Abstract

The study has determined an increase of the degree of thermal carbon extraction of the molybdenum oxide concentrate from 11 % to 97 % with an increase in the processing temperature from 873 K to 1373 K, respectively. A further rise in temperature to 1473 K led to a reduction in the degree of recovery to 89 %. The recovery products after treatment at 873–1073 K mostly consisted of MoO 2 with some Mo and Mo 2 C manifestations. Treatment at 1223–1473 K provided a predominance of Mo and Mo 2 C as to the oxide component. The microstructure of the recovery products was spongy and disordered with varying degrees of sintering, depending on the processing temperature. The alloying of R6M5 steel with the new molybdenum material in experimental industrial conditions provided an increase in the Mo uptake rate from 88.9 % to 95.0 % compared with the standard technology. Improvement of environmental safety is achieved by replacing carbon monoxide and aluminothermic melting of ferroalloy production of Mo with the latest methods of powder metallurgy.

Keywords

UDC 669.15′28-198, молібденовий концентрат; вуглецевотермічне відновлення; металізація; сублімація; фазовий аналіз; мікроструктура; ресурсозбереження, molybdenum concentrate; thermal carbon extraction; metallization; sublimation; phase analysis; microstructure; resource sparing, молибденовый концентрат; углеродотермическое восстановление; металлизация; сублимация; фазовый анализ; микроструктура; ресурсосбережения

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
gold