 PyroGenesis Canada Inc TSE:PYR NASDAQ:PYR FRA:8PY said it has signed a contract for 4 million with HPQ Silica Polvere Inc, a wholly-owned subsidiary of HPQ Silicon Resources Inc HPQ, a provider of low carbon emission silicon-based solutions. The partnership is part of the larger government contract PyroGenesis announced earlier this year, that saw the maker of advanced plasma processes and products win a 700,000 grant from Sustainable Development Technology Canada to develop a novel production process using a plasma reactor to transform quartz into fumed silica. 