Investigation into regularities of leaching sulfated cinders of roasting copper-zinc middlings / Panshin A. M.,Mamyachenkov S. V.,Tropnikov D. L.,Anisimova O. S.,Rogozhnikov D. A. // RUSSIAN JOURNAL OF NON-FERROUS METALS. - 2017. - V. 58, l. 4. - P. 345-350.

ISSN/EISSN:

1067-8212 / 1934-970X

Type:

Article

Abstract:

Results of an analysis of thermodynamic characteristic and the investigation into kinetic regularities of leaching a new type of sulfated copper-zinc middlings formed with the removal of sulfide materials that cannot be effectively selected by flotation are presented. When analyzing the kinetic curves, it is established that the reaction rate abruptly differs between the initial time period (30 min) and the subsequent period at any acid concentration in a range of 0-20 g/dm(3). In the initial instant, the rate is controlled only by the external diffusion, while after 30 min of the process, the kinetic obstacles start to manifest themselves. Reaction orders of cinder leaching are determined to be as follows: 1.0 +/- 0.1 for copper, 0.87 +/- 0.1 for zinc, and 0.56 +/- 0.1 for iron. A calculation of the apparent rate constant of the leaching reaction showed its weak temperature dependence, which correlates well with the thermodynamic analysis data.

Author keywords:

sulfated copper-zinc middlings; sulfuric acid leaching; thermodynamic characteristics; kinetics

DOI:

10.3103/S1067821217040137

Web of Science ID:

ISI:000409525800004

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL
Publisher	ALLERTON PRESS INC
Address	18 WEST 27TH ST, NEW YORK, NY 10001 USA
Language	English
EISSN	1934-970X
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
Author-Email	info@ugmk.com svmamyachenkov@yandex.ru tdl@svg.ru osanis@mail.ru darogozhnikov@yandex.ru
Funding-Acknowledgement	Russian Foundation for Basic Research {[}16-38-60095 mol\_a\_dk]
Funding-Text	This study was supported by the Russian Foundation for Basic Research in the scope of the scientific project no. 16-38-60095 mol\_a\_dk.
Number-of-Cited-References	15
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	1
Journal-ISO	Russ. J. Non-Ferrous Metals
Doc-Delivery-Number	FG1AU