Prospects of the Use of Ash-and-Slag Wastes from Fuel-Bed Firing of Brown Coal of the Kangalas Field of the Lena Basin
O. M. SHARONOVA1, G. V. AKIMOCHKINA1, S. KH. LIFSHITS2, V. S. SUKNEV3, K. K. KONSTANTINOVA4, N. V. ARKHINCHEEVA4, A. G. ANSHITS1 and V. A. KASHIRTSEV2
1Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences, Ul. K. Marksa 42, Krasnoyarsk 660049 (Russia)
E-mail: shar@icct.ru
2Institute for Petroleum and Gas Problems, Siberian Branch of the Russian Academy of Sciences,
Ul. Oktyabrskaya 1, Yakutsk 677891 (Russia)
3Diamond and Precious Metal Geology Institute, Siberian Branch of the Russian Academy of Sciences,
Pr. Lenina 39, Yakutsk 677980 (Russia)
4Baikal Institute of Nature Management, Siberian Branch of the Russian Academy of Sciences,
Ul. Sakhyanovoy 6, Ulan Ude 670047 (Russia)
(Received September 14, 2005; revised October 18, 2005)
Pages: 183-191
Abstract
Granulometric and chemical composition of the ash-and-slag wastes (ASW) of fuel-bed firing of the brown coal from the Kangalas field of the Lena basin was investigated. The ash-and-slag material was separated by means of magnetic separation of the granulometric and hydrodynamic classification. The content of rare elements (RE) and rare-earth elements (REE) in the initial ash-and-slag and in separation products differing in particle size, density and magnetic properties was determined. It was shown that RE and REE content of the low-density products of hydrodynamic separation increases, while it decreases in the magnetic products. Manganese is also observed to get concentrated in the latter. In view of the low content of RE and REE in low-density products in comparison with the matter from ore deposits, it is concluded that the isolation of the metals from the investigated ASW is unreasonable. It was shown that the use of the investigated ASW in construction industry is promising; the compositions for obtaining nonfired bricks and building mortars of the grade strength were chosen.
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