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RARE METALS, SEMICONDUCTORS
ArticleName Alkaline autoclave opening of beryllium concentrates on Ermakovskoe deposit
DOI 10.17580/tsm.2017.02.09
ArticleAuthor Nesterov K. N., Radushinskiy S. M., Alekberov Z. M.
ArticleAuthorData

Leading Scientific-Research Institute of Chemical Technology, Moscow, Russia:

K. N. Nesterov, Senior Researcher, e-mail: nestor_@mail.ru
S. M. Radushinskiy, Head of Autoclave Group, e-mail: radushinskiy@yandex.ru
Z. M. Alekberov, Leading Engineer, e-mail: zaur_alekberov@mail.ru

Abstract

This paper shows the experimental results of beryllium extraction from bertrandite-phenakite concentrate on Ermakovskoe deposit by alkalineautoclave method. The method of concentrate processing was chosen; physical and chemical basis of the process were investigated; optimal technological parameters and fluorite-beryllium concentrates' processing conditions were defined. The disadvantages of modern concentrate processing technologies were found, and advantages of alkaline autoclave opening of beryllium-bearing raw materials are shown. The influence of various factors on the completeness of beryllium extraction in solution was investigated. Presence of CaO makes possible the bending of silicon, contained in concentrate, into sodium-calcium hydrosilicate. Purification from fluor is carried out by sedimentation of sodium cryolite, which is also removed with dump cake. Increasing of caustic soda concentration, temperature and time makes a little influence on the process indicators. The main opening parameters were found. The carried out investigations proved the principal possibility of usage of alkaline autoclave opening for processing of beryllium concentrates on Ermakovskoe deposit and will be the basis of recommendations for the development of innovation technology of beryllium hydroxide obtaining in the production conditions.
This scientific work was carried out within the Federal Target Program of the Ministry of Education and Science of the Russian Federation “Investigations and developments by the priority ways of development of the scientific and technological complex of Russia for the period of 2014–2020”. Subsidiary agreement No. 14.582.21.0008, unique identifier: RFMEFI58215X0008.

keywords Deposit, beryllium, autoclave, leaching, bertrandite, phenakite, caustic module
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