D. Serikbaev East Kazakhstan state technical university

N. A. Kulenova, Head of “Chemistry, Metallurgy and Processing” Department, e-mail: Nkulenova@ektu.kz

Zh. S. Onalbaeva, Lecturer

N. A. Baigazova, Assistant Professor

Joint Stock Company “Ulba Metallurgical Plant”

V. I. Samoilov, Lecturer

A. N. Borsuk, Beryllium Production Deputy Chief

The interaction kinetics activated by melting with beryllium flux and sulfuric acid has been investigated. Beryl is resistant to the chemicals (under normal conditions it hardly interacts only with hydrofluoric acid). Beryl activity is increased through its alkaline decomposition. According to the modern ideas about the interaction of beryl with soda ash (lime) their melting ties up the part of silica in sodium metasilicate (calcium), destroying the crystal of beryl. In addition to these compounds during melting and cooling (granulation) the melt by water complex silicates and sodium beryllium (beryllium and calcium) are formed. Cooled glassy meltgranulate after grinding is deeply and quickly opened by sulfuric acid under the temperature of spontaneous heating of the reaction mixture and forming a watersoluble sulfates and insoluble silica, gypsum. After leaching of reaction mixture from sulphate solution Ве(ОН)₂ is precipitated by the ammonia-water mixture. In the given paper the value of apparent activation energy of interaction kinetics activated by smelting with beryllium flux and sulfuric acid (E_app = 8.3 kJ /mol) has been identified. The calculated value E_app proves that the investigated process, apparently, goes on in the diffused area. So we can suppose that this process is limited by the rate of diffusion of acid molecules to the surface through the reaction layer of forming reaction products.

1. Samoylov V. I. Eksperimentalnaya razrabotka perspektivnykh khimicheskikh metodov izvlecheniya berilliya i litiya iz mineralnogo syrya (Experimental development of promising chemical methods of lithium and beryllium extraction from mineral ores) Ust-Kamenogorsk, 2006. 551 p.

2. White D., Berk G. Berilliy – Beryllium. Moscow, 1960. 616 p.
3. Darvin G., Baddery G. Berilliy – Beryllium. Moscow, 1962. 324 p.
4. Berilliy: nauka i tekhnologiya : per. s angl. Pod red. G. F. Tikhinskogo, I. I. Papirova (Beryllium: science and technology). Moscow, 1984. 624 p.
5. Zelikman A. N., Meerson G. A. Metallurgiya redkikh metallov (Metallurgy of Rare Metalls). Moscow, 1973. 608 p.
6. Khimicheskaya tekhnologiya i metallurgiya berilliya i ego splavov : sb. perevodov. Pod red. M. B. Borisova. Ch.1 (Chemical technology and metallurgy of beryllium and its alloys: collection of translations. Part 1). Moscow, 1953. pp. 5—25.
7. Samoylov V. I., Borsuk A. N., Kulenova N. A. and etc. Zhurn. prikl. khimii – Journal of Applied Chemistry. 2008. Vol.81. No. 6. pp. 895—903.
8. Kulenova N. A., Samoylov V. I., Shushkevich L. V. and etc. Tekhnologicheskoe oprobovanie berillovykh kontsentratov s polucheniem gidroksida berilliya. Resursovosproizvodyashchie, malootkhodnye i prirodookhrannye tekhnologii osvoeniya nedr : mater. VI Mezhdunar. konf (Technological testing of beryllium concentrates with beryllium hydroxide obtaining. Resource reproduction, low-waste and environmental technologies of mineral resources development. VI International Conference). Moscow, 2007. pp. 391–393.
9. Samoylov V. I., Borsuk A. N. Metody sovmestnoy pererabotki fenakita, bertrandita i berilla v gidrometallurgii berilliya (Methods of joint phenacite, bertrandite, beryl processing in beryllium hydrometallurgy). Ust-Kamenogorsk, 2006. 200 p.
10. Voldman G. M., Zelikman A. N. Teoriya gidrometallurgicheskikh protsessov (Theory of hydrometallurgical processes). Moscow, 2003. 424 p.