Moscow State Mining University (MGGU)

A. A. Abramov, Professor, e-mail: AbramovAA31@mail.ru

In this part of the article theoretical bases of the problem in creation of new more selective reagentscollectors extremely necessary for increase in efficiency of technological processes of flotation and complexity use of mineral raw material are considered. The essence and lacks of widely known flotation hypotheses now in use for a choice or creation of new more selective collectors are considered. It is shown, that conditions for formation on a minerals surface of valence-saturated bonds of the collector with a mineral cation required by Taggart’s «chemical theory», formation of chemisorption coverings of the collector by Shwedov’s hypothesis, physical sorption of ions, molecules or their complexes by other hypotheses cannot be used as the criterion for a choice and designing of selective reagents-collectors and do not allow to solve the problem discussed. On the basis of the modern flotation theory requirements to the structure of the collector sorption layer the new flotation hypothesis is offered. By this hypothesis the effective flotation of a mineral occurs if only as the chemically fixed and physically sorbed collector are present on its surface. In this case as the thermodynamic probability of a mineral particle fastening on an air bubble and opportunity of the effective break of the hydrate layer between them as well as repeated hardening of the air bubble — particle contact in turbulent conditions of flotation are provided. Absence of any of forms of collector sorption on the surface of minerals not possessing natural hydrophobicity leads to its depression. Requirements of the new flotation hypothesis to the structure of the sorption layer on the surface of minerals divided in common with conditions for selective interaction of functional groups and ionic-molecular complexes of the collector with a mineral surface allow (as will be shown in part 2 of the article) to formulate the proved requirements to a choice and designing of selective reagents-collectors.

1. Abramov A. A. Flotatsionnye metody obogashcheniya. 3-e izd., pererab. i dop (Flotation methods of enrichment. 3-d ed., revised and enlarged). Moscow : MGGU Publ., 2008. 708 p.

2. Volkenshteyn F. F. Fizikokhimiya poverkhnosti poluprovodnikov (Physicochemistry of the semiconductors` surface). Moscow : Nauka, 1973. 399 p.

3. Abramov A. A. Flotatsiya. Reagenty-sobirateli (Flotation. Reagents-collectors). Moscow : MGGU Publ., 2012. 620 p.

4. Sorokin M. M. Flotatsionnye metody obogashcheniya. Khimicheskie osnovy flotatsii (Flotation methods of enrichment. Chemical basis of flotation). Moscow : MISIS, 2011. 411 p.

5. Mielczarski J. A., Cases J. M., Bouquet E., Barres O., Delon J. F. Nature and structure of adsorption layer on apatite contacted with oleate solution. 1. Adsorption and Fourier transform ifrared reflection studies. Langmuir, 1993. 9. p. 2370. I. A. 2382.

6. Chanturiya V. A., Vigdergauz V. E. Elektrokhimiya sulfidov. Teoriya i praktika flotatsii (Sulphide electrochemistry. Theory and practice of flotation). Moscow : “Ruda i Metally” Publ., 2008. 272 p.

7. Avdokhin V. M. Gornyy informatsionno-analiticheskiy byulleten – Mining informational and analytical bulletin. 1995. Is. 6. pp. 3–8.

8. Ryaboy V. I. Obogashchenie Rud – Mineral processing. 2008. No. 6. pp. 24–30.

9. Kurkov A. V. Osnovy teorii i praktika razrabotki flotatsionnykh reagentov i protsessov dlya glubokogo obogashcheniya bednykh kompleksnykh rud redkikh metallov s tselyu sozdaniya malootkhodnykh proizvodstv : avtoref. dis. ... d-ra tekhn. nauk (Theory basis and practice of the development of the flotation reagents and processes for the deep enrichment of the rare metals` poor composite ores for the purpose of creating the low-waste productions : Thesis of inauguration dissertation of Doctor of Engineering Sciences). Moscow : VNIIKHT, 1999. 28 p.

10. Ignatkina V. A. Razvitie teorii selektivnosti deystviya sochetaniy sobirateley pri flotatsii trudnoobogatimykh rud tsvetnykh metallov : avtoref. dis. ... d-ra tekhn. nauk (Development of the selectivity theory of the collectors` combination effect by flotation of the non-ferrous metals` ores, which are difficult for processing : Thesis of inauguration dissertation of Doctor of Engineering Sciences). Moscow : MISIS, 2011. 46 p.

11. Solozhenkin P. M., Solozhenkin O. I. Tsvetnye Metally – Non-ferrous metals. 2010. No. 7. pp. 11–14.

12. Abramov A. A. Flotatsiya. Fiziko-khimicheskoe modelirovanie protsessov (Flotation. Physical and chemical modeling of processes). Moscow : MGGU Publ., 2010. 613 p.