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Re: Fairways18 post# 35860

Friday, 09/25/2009 11:26:53 AM

Friday, September 25, 2009 11:26:53 AM

Post# of 83059
OK, but either all the copper would need to go through the mag circuit, or vise versa, right? Regardless after the mag circuit, there is still about 10 parts mag to 1 part of copper.

It seems that the mag circuit is only getting 55% of the mag con. for example

30% mag in ore
1200 tpd ore processed
360 ton of mag in ore
2000 ton every 10 days (per the pr) = 200 tpd of mag
160 ton of mag remaining after mag line???
1.5% copper in 1200 tons = 18 tons copper in ore.

Therefore if 160 tons of mag is not being removed from any point on the line, it implies that 160 tons of mag are going through floatation??? That is where I am wondering if the chemistry and/or reagents are not specific enough to float the copper (easily) without also floating the mag. Since floating the mag would be disastrous to the con quality if it was all to be captured in floatation, con quality would drop to <10% CU. It would make sense that the residual mag would need to go with the tailings, and therefore taking some of the CU with it, which in turn would yeild a lower recovery rate, thus explaining the lower quantity of concentrate being shipped on a daily basis.

Again, I am not prefessing anything here, I am asking, since I don't know, but simply trying to justify why only 25 ton of con is shipping after processing 1200 ton ore. Seems to be only about a 50% CU recovery rate (imo).

sd

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