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however as the concentration of copper in the ore bodies decreased the energy costs of smelting the whole ore also became prohibitive and it became necessary to concentrate the ores first. initial concentration techniques included hand-sorting and gravity concentration. they resulted in high losses of copper.
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barrick/newmont jv’s turquoise ridge underground gold mine complex. source: panoramio. the grade or concentration of a mineral or metal in ore directly affects costs associated with mining as
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because of their vast reserves of moonjuice however the high elves won. the war totalled the continent caused the high elves to build this huge wall to keep out humans and triggered an ongoing high elf civil war which could bubble over into larger conflict at any time.
produced by greyber electrics this battery is the standard for most industrial jobs including construction mining deep sea farming and polar water delivery. the red color is due to the high concentration of iron. used in higher quality electronics and circuitry when refined gold is needed for more advanced items.