pre leach residue

  • Diagnostic Leach Test

    Sep 26, 2017 · Step 4: The resulting residue form step 3 is subjected to another oxidative pre-leach (H2SO4) followed by CIL to determine gold associated with sphalerite and reactive pyrite and other labile ...

  • Enhanced leachability of gold and silver in cyanide media ...

    pre-treatment and then secondly leaching with cyanide solution. These two steps ensured that free gold and silver found in the zinc refin- ery residue and in the .

  • Leaching of rare earths from bauxite residue (red mud)

    1 Leaching of rare earths from bauxite residue (red mud) Chenna Rao Borraa, Yiannis Pontikesb, Koen Binnemansc and Tom Van Gervena* aDepartment of Chemical Engineering, KU Leuven, 3001 Leuven, Belgium bDepartment of Materials Engineering, KU Leuven, 3001 Leuven, Belgium cDepartment of Chemistry, KU Leuven, 3001 Leuven, Belgium *Corresponding author.E-mail address: .