September 5, 2011   China sulphate additives prices stay flat   An eFeedLink Exclusive     Prices were unchanged.   Transacted prices of sulphate feed additives in China Variety Price as of Aug 19 (RMB/tonne) Price as of Sep 3 (RMB/tonne) Price change (RMB/tonne) Cupric sulphate 16,100-16,300 16,100-16,300 0 Ferrous su ...