Brine leaching of lead-silver ores, with electrolytic precipitation

The present economic importance of lead has greatly emphasized the necessity of obtaining it from its low grade ores. recent developments in flotation have simplified very much the problem as regards sulphide ores, but other methods must be employed when oxidized lead ores are encountered. In most of the low grade deposits, silver in varying quantities is present, so that when developing a method of extracting the lead the silver extractions must also be considered. Ordinary concentration methods are not applicable to such ores and therefore other processes must be perfected.