| Autor: |
Abdelmalek-Babbou, Ch., Chaabani, F., Henchiri, A. |
| Předmět: |
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| Zdroj: |
International Review of Chemical Engineering - Rapid Communications; Sep2011, Vol. 3 Issue 5, p592-601, 10p, 3 Color Photographs, 2 Diagrams, 4 Charts, 2 Graphs, 4 Maps |
| Abstrakt: |
The Aguiba ore mineralization is of the Pbx-Ba-Sr type from which Galena (PbS) has been exploited. The only secondary mineral remaining is found as cerussite (PbCO3). Economic quantities of lead can be concentrated from secondary minerals such as cerussite by the froth flotation process. Tunisian sulphide ores contain relatively large amounts of secondary lead minerals besides lead sulphides at low grade. This oxidized ore type has however, previously been regarded as uneconomic. The current tendency in increasing metal prices has motivated the search for new deposits as well as appropriate technology such as froth flotation to make oxidized ore economically profitable. Lead flotation of secondary minerals is much more difficult than that of sulphides. Cerussite sulphidization with Na2S results in important recovery of total Pbx (79.1%) and oxidized Pbx (73.39%) from a feed grade 3.23 % total Pbx and 2.3% oxidized Pbx. The separation efficiency increases from 14.74% to 45.57% after addition of Na2S, which enables lead to float more efficiently. In fact, major advances in productivity and technology have greatly increased both the amount of resources and the supply of Pbx. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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