Журналы →  Non-ferrous Мetals →  2012 →  №1 →  Назад

TECHNOLOGY OF RARE, DISPERSED AND RADIOACTIVE ELEMENTS OBTAINING
Название Research of fluorination process of rutile concentrate
Автор Karelin V. A., Mikutskaya E. N.
Информация об авторе

Seversk Technological Institute of National Research Nuclear University “MEPhI”

V. A. Karelin, Professor, e-mail: vladimir@seversk.tomsknet.ru

E. N. Mikutskaya, Senior Lecturer

Реферат

The brief review of industrial technologies of processing the titanium containing concentrates has been carried out. Drawbacks of existing schemes of titanium manufacture are shown and the necessity of essentially new fluoride technologies development has been proved. The reactions proceeding during fluorination of rutile concentrate with element fluoride are described in the given work. The thermodynamic research of the process was carried out with the use of the ASTRA computer program. We have shown that from the thermodynamic point of view the process of fluorination has no restrictions. Dependence of change of mass concentration of titanium tetra fluoride was investigated in products of reaction on the temperature of the process, and the choice of optimum surplus of element fluoride was proved. The equilibrium composition of fluorination products of rutile concentrate was determined at the chosen surplus of fluoride. The basic stages of process were described and its kinetic features were studied. The factors influencing the fluorination speed were determined. Mathematical processing of the research results showed that for the description of fluorination kinetics it was necessary to use Yander’s equation. It was established, that the process is limited by some diffusion factors, such as supply of a fluorinating reagent to a surface of a solid material. The activation energy of fluorination process was determined. The conditions of the process carrying out on industrial equipment were discussed.

Ключевые слова Rutile concentrate, fluorination process, fluorine, titanium dioxide and tetrafluoride, fluorides of alloys, thermodynamics and kinetics of process, ratelimiting step
Библиографический список

1. Korovin S. S., Zimina G. V., Reznik A. M. et al. Redkie i rasseyannye elementy. Khimiya i tekhnologiya. V 3 kn. Kn. II. (Rare and Scattered Elements. Chemistry and Tehnology. In 3 books. Part II). Ed. S. S. Korovin. Moscow, 1997. 376 p.
2. Summary of Emerging Low Cost Titanium Technologies. For US Dept. of Energy. Oak Ridge National laboratory. — EHK Technologies, January 2004. Available at : http://enginematerials.ornl.gov/Kraft-Titanium-2.pdf
3. Zelikman A. N. Metallurgiya tugoplavkikh redkikh metallov (Metallurgy of Refractory Rare-earth Metals). Moscow, 1986. 440 p.
4. Parfenov O. G., Pashkov G. L. Problemy sovremennoy metallurgii titana (Problems of Contemporary Metallurgy of Titanium). Ed. A. D. Mikhnev. Novosibirsk, 2008. 279 p.

5. Karelin V. A., Karelin A. I. Ftoridnaya tekhnologiya pererabotki kontsentratov redkikh metallov (Fluoride Technology of Concentrates of Rare-earth Metals Reprocessing). Tomsk, 2004. 184 p.
6. Karelin A. I., Karelin V. A., Kazimirov V. A. Sposob polucheniya veshchestva, vybrannogo iz ryada: bor, fosfor, kremniy i redkie tugoplavkie metally (Method of obtaining a substance, selected form a following raw: boron, phosphorus, silicon and rare-earth refractory metals). Patent RF, No. 2298589. Priority 25.04.2005. Gosudarstvennyy reestr izobreteniy RF (State Register of Inventions of the Russian federation). 10.05.2007.
7. Sinyarev G. B., Vatolin N. A., Trusov B. G., Moiseev G. K. Primenenie EVM dlya termodinamicheskikh raschetov metallurgicheskikh protsessov (The Use of Computers for Thermodynamic Calculation of Metallurgical Process). Moscow, 1986. 261 p.
8. Shcherbakov V. I., Zuev V. A., Parfenov A. V. Kinetika i mekhanizm ftorirovaniya soedineniy urana, plutoniya i neptuniya ftorom i galogenftoridami (Kinetics and Mechanism of Fluorination of Uranium, Plutonium and Neptunium Compounds by Fluorine and Halogenated Fluorine). Moscow, 1985. 127 p.
9. Levenshpil O. Inzhenernoe oformlenie khimicheskikh protsessov (Engineering Support of Chemical Processes). Moscow, 1969. 622 p.
10. Kopyrin A. A., Karelin A. I., Karelin V. A. Tekhnologiya proizvodstva i radiokhimicheskoy pererabotki yadernogo topliva : uchebnoe posobie dlya vuzov (Technology of Manufacturing and Radiochemical Reprocessing of Nuclear Fuel : a textbook for high schools). Moscow, 2006. 576 p.
11. Galkin N. P., Sudarikov B. N., Veryatin U. D. et al. Tekhnologiya urana (Technology of Uranium). Moscow, 1964. 398 p.

Language of full-text английский
Полный текст статьи Получить
Назад