STUDIES ON THE EXTRACTION OF MAGNESIA FROM LOW-GRADE MAGNESITES BY CARBON-DIOXIDE PRESSURE LEACHING OF HYDRATED MAGNESIA

被引：18

作者：

SHEILA, D

SANKARAN, C

KHANGAONKAR, PR

机构：

[1] Centre for Water Resources, Guindy, Engineering College, Madras

[2] National Metallurgical Laboratory, Madras Centre, CSIR Madras Complex

[3] School of Material and Mineral Resources Engng., University Sains Malaysia, 30000 Ipoh, Perak Branch Campus

来源：

MINERALS ENGINEERING | 1991年 / 4卷 / 01期

关键词：

carbon dioxide; hydration; kinetics; Magnesite; pressure leaching; solubility;

D O I：

10.1016/0892-6875(91)90120-K

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The applicability of carbon dioxide pressure leaching for the extraction of magnesia of high purity from low grade magnesites and waste dumps material has been investigated. Factors which influence the magnesia recovery such as time, temperature, pressure, particle size, solid/liquid ratio and calcination temperature have been studied and optimum values were determined. The kinetic data were examined according to the rate equation -ln(1 - α) against t and the activation energy of 26.4 kJ mol-1 (6.3Kcal mol-1) suggested that the kinetics of the reaction are controlled by surface chemical reaction. © 1990.

引用

页码：79 / 88

页数：10

共 22 条

[1] Vijayaraghavan, Satyanarayana, Raman, Khangaonkar, NML I.R.No. 863/76, (1976)
[2] Vijayaraghavan, Satyanarayana, Mohan, Khangaonkar, NML I.R.No. 1037/80, (1980)
[3] Vijayaraghavan, Satyanarayana, Mohan, Khangaonkar, NML I.R.No. 1203/85, (1985)
[4] Kippe, U.S. Patent 2912306, (1959)
[5] Grill, Bouvier, British Patent 1332736, (1973)
[6] Cross, Krieger, Anschutz, Hirsh, U.S. Patent No. 4096235, (1978)
[7] Ainscow, Refractories Journal, pp. 6-13, (1984)
[8] Mower, Chemical Abstract, 47, (1953)
[9] Belyaev, Seryi, Zh. Prikl. Khim, 51, 2, (1978)
[10] Horiguchi, J. Sci. Research Inst., 46, pp. 258-267, (1952)

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