Autoclave leaching kinetics of a leucoxene concentrate with alkaline solutions
Tóm tắt
The autoclave leaching kinetics of a leucoxene concentrate from the Yaregskoe deposit (Komi Republic, Russia) with NaOH and Na2SiO3 solutions is studied. The changes in the activation energy and reaction order are determined as a function of the degree of desiliconization of a leucoxene concentrate. A steplike character of quartz leaching is shown: “internal” quartz dissolves at the first stage and then free quartz dissolves.
Tài liệu tham khảo
L. P. Tigunov, L. Z. Bykhovskii, and L. B. Zubkov, “Titanium ores of Russia: mastering state and prospects,” in Mineral Raw Materials. Geological Economical Series (VIMS, Moscow, 2005), No. 17.
G. B. Sadykhov, V. A. Reznichenko, Yu. V. Zablotskaya, T. V. Olyunina, N. Yu. Kiryushkina, K. G. Anisonyan, D. Yu. Kop’ev, and I. M. Zelenova, “Oil-bearing sandstones of the Yaregskoe deposit as a solution of the problem of titanium raw materials in Russia,” Titan 1(18), 12–19 (2006).
I. V. Shvetsova, Mineralogy of Leucoxene from the Yaregskoe Deposit (Nauka, Moscow, 1975).
Yu. V. Zablotskaya, G. B. Sadykhov, T. V. Gon- charenko, T. V. Olyunina, K. G. Anisonyan, and R. K. Tagirov, “Pressure leaching of leucoxene concentrate using Ca(OH)2,” Russian Metallurgy (Metally), No. 11, 859–864 (2011).
D. A. Frank-Kamenetskii, Diffusion and Heat Transfer in Chemical Kinetics (Nauka, Moscow, 1987).
A. I. Brodskii, Physical Chemistry: Two Volumes. Vol. 2. Solutions, Electrochemistry, Chemical Kinetics, and Photochemistry (GONTI Khim. Lit-ry, Leningrad, 1948).
A. A. Zhukhovitskii and L. A. Shvartsman, Physical Chemistry (Metallurgiya, Moscow, 1987).
A. S. Medvedev, Leaching and Methods of Its Intensification (MISiS, Moscow, 2005).
G. M. Vol’dman and A. N. Zelikman, Theory of Hydrometallurgical Processes (Intermet Inzhiniring, Moscow, 2003).