Sunday, August 14, 2011
Daniel Cowan Jackling--Bingham Canyon Mine
Daniel Jackling was an American mining engineer and metallurgist who founded the Utah Copper Company and with an economical method to process low-grade porphyry copper ores, below 2% copper. As electricity use expanded in the early 20th century, so demand for copper rose, and the need to exploit even low-grade ore. Such ore was obtained by open-pit mining then loaded by steam shovels into railroad cars and transported to concentrating mills. Jackling developed improved extraction/flotation processes to produce a higher-grade concentrate for smelting. By the time Jackling died, over 60% of the world's copper production took advantage of his low-grade ore processing methods. His Bingham Canyon Mine, now a huge pit, still produces copper.
I thought the industry was dead but who produces approximately 300,000 tons of copper, along with 400,000 ounces of gold, 4 million ounces of silver, about 20 million pounds of molybdenum, and about 1 million tons of sulfuric acid as a by-product ? Kennecott Utah Copper, of course.
Daniel Cowan Jackling [Wikipedia]
Bingham Canyon Mine [Wikipedia]