See: Zinc set to go sky high as supplies deplete in medium term
Of note:
The main factor that comes into play here is mine supply, with some of the biggest zinc mines in the world set to close over the coming years - the Century mine in Australia owned by China's Minmetals, which produces 500,000 tonnes a year, is due to close in early 2016 (actually early 2015 I think), while Xstrata's (LON:XTA) Brunswick mine in Canada, which provides 220,000 tonnes a year, is due to shut in early 2013.
KZL Price at posting:
31.0¢ Sentiment: Buy Disclosure: Held