Mumbai, June 29 -- Hindustan Zinc Ltd plans to add at least three new metals to its portfolio over the next five years as it seeks to transform from a zinc-focused miner into a diversified critical minerals company, chief executive Arun Misra said at its 60th annual general meeting on Monday.

The Vedanta Group company, India's largest producer of zinc and silver, said its long-term strategy is to diversify beyond its existing portfolio of zinc, lead, silver and cadmium by entering businesses such as rare earths, potash and tungsten.

"In our strategic vision, in the next five years we must add about three more new metals to our portfolio," Misra told shareholders, adding that the company could also pursue opportunities in copper or gold ...