Recovery of metal values from zinc plant residues

Details Recovery of metal values from zinc plant residues Recovery of metal values from zinc plant residues

C - Chemistry, Metallurgy

22

B

C22B 7/00 (2006.01) C22B 3/08 (2006.01) C22B 15/00 (2006.01) C22B 19/30 (2006.01)

Patent

CA 2076025

2076025 9109146 PCTABS00005 A process is disclosed for recovering zinc, lead, copper and precious metals from zinc plant residue, said process comprising leaching the residue with return zinc spent electrolyte, neutralizing residual acid and reducing ferric iron in the solution by addition of zinc sulphide concentrate in the presence of a limited quantity of oxygen, flotation of the resulting slurry to separate unreacted zinc sulphide, treatment of the flotation tailings with sulphur dioxide and elemental sulphur to further leach iron, zinc and impurity elements and precipitate copper, flotation of the resulting slurry to separate a copper sulphide concentrate, thickening, filtering and washing of the flotation tailings followed by addition of lime and sodium sulphide to activate lead sulphate and flotation of a lead concentrate from the residue. Iron and impurity elements are precipitated from the copper flotation tailings thickener overflow solution by addition of zinc hydroxide sludge, lime and oxygen to produce a high strength, iron free zinc sulphate solution.

Affiliated with

Also associated with

Rating

Recovery of metal values from zinc plant residues does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recovery of metal values from zinc plant residues, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of metal values from zinc plant residues will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-2024299