The Hydrometallurgy of the Base-Metals and its Application to Canada

THERMAL methods have been predominant in the metallurgy of the base-metals ever since the foundation of the industry thousands of years ago. Development in hydrometallurgy has been confined largely to the past six or seven decades. It was at first necessarily slow, then for a number of years rapid progress was made. At present, the uncertain state of the metal industry has curtailed research on the subject; however, in the next few years one may assuredly look forward to an ever increasing use of wet processes.
Keywords: copper, Copperopolis, Heap Roasting.-Leaching, hydrometallurgy, sulphuric acid, zinc, leaching, Ore, Ores, Process, Processes, zinc
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