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HEAVY NON-FERROUS METALS
ArticleName Oxidation chain mechanism of non-ferrous heavy metals and iron sulphides
ArticleAuthor Okunev A. I.
ArticleAuthorData

Russian Academy of sciences Ural Branch

A. I. Okunev, Leading Scientific Associate, 8(343)267-89-16

Abstract

Chain mechanism of sulphides oxidation had been scientifically proved and experimentally confirmed. The lowest sulphides appear to be oxidized with intermediate oxi-sulphide MeSO2 complex formation. The complex then decays by МеО and sulfur monoxide SO(g). At low temperatures, when SO and SO2 has no place, sulphides oxidation is realised with oxi-sulphides MeSO3 and MeSO4 formation. It was emphasized, that lowest sulphides oxidation is related to category of chain reactions with unbranched chains. Higher sulphides oxidation (for example FeS2) is realized with branching of chains. Due to this process, the oxidation has explosive nature and the primary act of it is the pyrite dissociation with the following elementary sulfur oxidation by the chain mechanism. Results of researches are confirmed by pilot and semiindustrial tests on roasting and melting of copper-zinc concentrates, ores and technogenic raw materials that has allowed to offer new devices and technologies on roasting and autogenous fusion of sulphidic materials. The developed theory of sulphides oxidation by the chain mechanism and its results have no analogues abroad.

keywords Metals sulphides, electronic-absorption spectrum, sulphur monoxide, oxygen adsorption, sulphides oxidation, chain mechanism, explosibility of pyrites, adiabatic device
References

1. Semenov N. N. O nekotorykh problemakh khimicheskoy kinetiki i reaktsionnoy sposobnosti (About some problems of chemical kinetics and reactivity). Moscow, 1954. 350 p.
2. Semenov N. N. Tsepnye reaktsii. 2-e izd (Chain Reactions. 2nd ed.). Moscow, 1986. 535 p.
3. Semenov N. N. Izbrannye trudy (v 4 tomakh) (Selected works (in 4 volumes)). Moscow, 2004.
4. Chufarov G. I., Tatievskaya E. P. Adsorbtsionno-kataliticheskaya teoriya vosstanovleniya okislov metallov. Problemy metallurgii (Adsorption-catalytic theory of metal oxide recovery. Problems of metallurgy). Moscow, 1956. pp. 21–32.
5. Esin O. A., Geld P. V. Fizicheskaya khimiya pirometallurgicheskikh protsessov. Ch. 1 (Physical chemistry of pirometallurgical processes. P. 1.) Sverdlovsk, 1962. 672 p.
6. Diev N. P., Okunev A. I., Paduchev V. V. and etc. Doklady AN SSSR – Reports Of The Academy Of Sciences Of The USSR. 1956. Vol. 107, No.2. pp. 273–275.
7. Frents G. S., Chizhikov D. M. K voprosu ob okislenii sulfidov metallov kislorodom. Problemy metallurgii (On the issue of the of metal sulphide oxidation by oxygen. Problems of metallurgy). Moscow, 1956. pp. 107–115.
8. Smirnov V. I., Tikhonov A. I. Obzhig mednykh rud i kontsentratov (Roasting of copper ores and concentrates). Moscow, 1966. 255 p.
9. Nalbandyan A. B. Teoriya tsepnykh razvetvlennykh reaktsiy. Khimicheskaya kinetika i tsepnye reaktsii (Theory of chain branched reactions. Chemical kinetics and chain reaction). Moscow, 1966. pp. 175–213.
10. Okunev A. I., Krasikov S. A. Metally – Metals. 2008. No. 5. pp. 3–8.
11. Strizhov G. F., Myasnikov P. A., Martynova V. N. and etc. Obzhig sulfidnykh kontsentratov v vikhrevoy kamere. Tsiklonnye energotekhnologicheskie protsessy i ustanovki (Roasting of sulphide concentrates in Vortex Chamber. Cyclone energy-technological processes and installations). Moscow, 1967. pp. 179–186.
12. Kuznetsov P. A. Issledovanie i razrabotka pirometallurgicheskogo sposoba utilizatsii piritnykh ogarkov i kontsentratov : Avtoref. dis.... kand. tekhn. nauk. (Study and development of pirometallurgice-ways recycling pyrites ogarkov and concentrates: author’s abstract... Candidate of Engineering Sciences). Yekaterinburg, 1997. 20 p.
13. Raspopin Yu. B. Teplovaya obrabotka polidispersnykh materialov v tsiklonnykh apparatakh. Avtoref. dis. ... kand. tekhn. nauk. (Heat-treatment of polydispersible materials in cyclone devices. author’s abstract... Candidate of Engineering Sciences). Yekaterinburg, 1989. 22 p.
14. Okunev A. I., Myasnikov P. A., Strizhov G. F., Adamov S. A. Kompleksnaya pererabotka sulfidnykh polimetallicheskikh kontsentratov v dvukhstupenchatoy tsiklonnoy ustanovke. Tsiklonnye plavilnye energotekhnologicheskie protsessy (Complex processing of polymetallic sulphide concentrates in two-stage cyclone installation. Cyclone melting energytechnological processes). Moscow, 1963. pp. 102–110.
15. Patent RF 2225455. Sposob avtogennoy plavki sulfidnykh mednykh kontsentratov (Method of sulphidecopper concentrates autogenous smelting). Okunev A. I.; Published 2004.
16. Patent RF 2241931. Avtogennyy obzhigovo-plavilnyy agregat (Autogenous kilning-melting unit). Okunev A. I. Published 2004.
17. Okunev A. I. Novaya kontseptsiya tekhnologii pererabotki rud tsvetnykh metallov. Nauchnye osnovy i progressivnye tekhnologii pererabotki trudnoobogatimykh rud i tekhnogennogo syrya blagorodnykh metallov (New concept of nonferrous metal ores processing technology. Scientific basis and breakthrough technologies of complex ores and precious metals technogenic raw materials processing). Yekaterinburg, 2001. pp. 131–133.
18. Okunev A. I., Krasikov S. A. Izv. vuzov. Tsvetnaya metallurgiya – Institute of higher education news. Nonferrous Metallurgy. 2009. pp. 12–14.

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