** Shares of Hindustan Zinc HZNC.NS rise as much as 1.6%
** Stock trimmed most gains to trade flat at 427.10 rupees in a broadly flat market .BO
** Miner will spend 38.23 billion rupees ($437.5 million) to set up a metals re-processing plant
** The plant with a capacity of 10 million tons per year, will recover metal from tailing dumps — waste piles left after ore processing
** Eleven analysts covering HZNC have a "hold" rating on average; median PT is 462 rupees, per LSEG data
** Stock down 3.8% YTD
(Reporting by Urvi Dugar)
((UrviManoj.Dugar@thomsonreuters.com;))