| 摘要 |
An integrated process for the recovery of copper from impure copper bearing materials is provided by leaching the copper bearing material with sulfuric acid to convert the copper value to the soluble copper sulfate, selectively extracting the copper value from the leach liquor by contacting the liquor with an organic extractant stripping the copper from the organic copper extractant by contacting with liquor of enhanced acid content resulting from a subsequent reduction step, thus regenerating the organic extractant, contacting and thus reacting the acidified copper containing solution with an organic solution of amine extractant to reduce its acid concentration to a desired level, and recovering the copper metal by reacting the copper containing solution of lowered acid content with sulfur dioxide. |
