Gipronickel Institute

V. M. Shpaer, Researcher, Laboratory of Hydrometallurgy
M. I. Kalashnikova, Head of Laboratory of Hydrometallurgy, e-mail: MIKal@nickel.spb.ru

In the process of oxidation leaching of sulphide concentrates having challenging composition, abnormal indices of the regular kinetics are observed, namely: order due to oxygen exceeds one; order due to oxygen and activation energy are not constant values. Mathematical modelling as analysis of leaching process’ macrokinetics has provided with the correct explanation of the anomalies revealed in the course of experimental work performance. It has been demonstrated that running of the series-parallel chemical reactions can cause intricate nature of the leaching process’ kinetic curves. It also explains the dependency of the reaction’ order due to oxygen observed in the course of testing on the rate of leaching. Peculiarities of the leaching process’ macrokinetics are related to the ratio of speeds of various series-parallel chemical reactions, the said ratio determining, among other parameters, ability of secondary sulphides formation and degree of the said process’ effect on the leaching kinetics.

1. Naboychenko S. S., Shneerson Ya. M., Kalashnikova M. I., Chugaev L. V. Avtoklavnaya gidrometallurgiya tsvetnykh metallov (Pressure Hydrometallurgy of Non-ferrous Metals). Ekaterinburg, 2008. Vol. 1. 376 pp.
2. Naboychenko S. S., Shneerson Ya. M., Kalashnikova M. I., Chugaev L. V. Avtoklavnaya gidrometallurgiya tsvetnykh metallov (Pressure Hydrometallurgy of Non-ferrous Metals). Ekaterinburg, 2009. Vol. 2. 612 pp.
3. Naboychenko S. S., Bolatbaev K. N. Tsvetnye Metally— Non-ferrous Metals. 1986. No. 10. pp. 27–29.
4. Naboychenko S. S. Avtoklavnaya pererabotka medno-tsinkovykh i tsinkovykh kontsentratov (High-pressure steam processing of copper-nickel and zinc concentrates). Moscow, 1989. 112 pp.
5. Bolatbaev K. N. Avtoklavnoe sernokislotnoe vyshchelachivanie tsinkovykh i medno-tsinkovykh kontsentratov : avtoref. dis. … kand. tekhn. nauk (High-pressure steam sulfuric-acid leaching of zinc and copper-zinc concentrates : abstracts of a thesis ... Candidate of Engineering Sciences). Sverdlovsk, 1986.
6. Shneerson Ya. M., Krasnov A. L., Kukin A. V. and etc. Tsvetnye Metally — Non-ferrous Metals. 1989. No. 1. pp. 17–20.
7. Shneerson Ya. M., Vigdorchik E. M., Ivanovskiy V. V., Kasatkin S. V. Tsvetnye Metally — Non-ferrous Metals. 1981. No. 3. pp. 34–37.
8. Shpaer V. M., Kalashnikova M. I. Tsvetnye Metally — Non-ferrous Metals. 2010. No. 5. pp. 23–27.
9. Shpaer V. M. Vysokotemperaturnoe avtoklavnoe vyshchelachivanie nizkosortnykh sulfidnykh tsinkovykh kontsentratov : avtoref. dipp. … kand. tekhn. nauk (High-pressure steam leaching of low-grade sulphide-zinc concentrates : abstracts of a thesis ... Candidate of Engineering Sciences). Saint Petersburg, 2010.
10. Ochkov V. F. Mathcad 7 Pro dlya studentov i inzhenerov (Mathcad 7 Pro for Students and Engineers). Moscow, 1998. 384 pp.
11. Shneerson Ya. M., Vasserman M. B., Zilber E. R. Kompleks. ispolz. mineralnogo syrya — Multipurpose Utilization of Mineral Resources. 1982. No. 7. pp. 37–42.