9. Pollution and the environment
The major drawback of molybdenite metallurgy is the release of SO 2 during roasting. This disadvantage is reduced when the gases are treated for rhenium extraction. The optimum conditions for recovering this element correspond to the optimum conditions for oxidizing MoS 2 . The use of oxygen-enriched air ensures total oxidation, as well as a reduction in gas volume.
Consequently, in terms of environmental protection, the sensitive points of this metallurgy are as follows.
The residual amount of SO 2 in the gases leaving the treatment: these gases are wet, and treatment with lime milk is the most appropriate (semi-wet or wet processes). An SO 2 ...
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Pollution and the environment
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