Definitely improve the quality. The original Century mine had a separate lead circuit however NCZ removed this as part of the changes to the circuit to treat the tailings. In the last quarterly they mentioned that they will be producing a separate lead con as part of stage 2 - where they have indicated that they may look to blend the tailings with fresh mined ore. However if they are not generating cash from ops they will need to raise funds or go to the market to get to stage 2.
The other problem of increasing volume of a lower grade zinc concentrate in a surplus concentrate market is that it will increase the zinc TC for miners - the lower the zinc con grade the greater the discount miner is going to have an offer.
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