SX EW Concentrate Leaching. 24 ©2006 Phelps Dodge Corporation Copper Concentrate Leaching History Process developments 1970's and 80's yAmmonia Arbiter yChloride CLEAR, SOX, Cuprex ... Bagdad Concentrate Leach Plant Copper Production 0 500,000 1,000,000 1,500,000 2,000,000 2,500,000 3,000,000