Re: .. 95 % recovery
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Feb 09, 2012 10:33PM
Discovery and development of precious metals - New Brunswick & Manitoba
Copper recovery of 95% at Turgeon Rimouski, April 21, 2010 - Puma Exploration (PUM-TSXV) has received the results of metallurgical tests carried out on the Turgeon copper-zinc deposit in New Brunswick. A series of tests were conducted on the two types of mineralization found in the Turgeon deposit: copper-rich stockwork zones, and massive sulphide zones carrying copper and zinc mineralization. The flotation tests produced a copper recovery of 95% and a concentrate with more than 20% Cu from the stockwork zone. The other tests achieved copper recoveries in excess of 80%. In addition, it appears that the mineralization in this zone requires relatively little grinding to obtain a good recovery. Indeed, the optimal grain size is less than 65% minus 200 mesh, and overgrinding may impair the quality of the concentrate and the recovery, as in Test XP-2. Results of tests carried out on the copper-rich stockwork zone Test Sample grade Cu (%) Copper content of concentrate (%) Recovery (%) XP-1 3.88 27.2 84.0 XP-2 3.83 17.9 65.4 XP-3 3.90 27.8 91.7 XP-4 3.84 24.8 80.8 XP-5 3.90 23.1 94.7 For the massive copper-zinc sulphide zones the optimal grind for an initial flotation of copper is similar to that for the stockwork zones: about 65% minus 200 mesh. Taking into account the grades of the feed and the grades of the tails, the highest possible recovery for the copper is 90%, and 94% for zinc in the massive sulphide zone. On the other hand, it appears difficult to suppress the zinc during copper flotation, and additional tests will be necessary to obtain a copper concentrate with a minimum content of zinc. It should be noted that this is a preliminary series of unoptimized tests, and that both the concentrate grade and the recovery are likely to be improved during subsequent testing.