Method for total precipitation of Metals bioleaching solution by Neutralization with Lime and / or Limestone in two stages.

摘要

A method is described for the total precipitation of metals in leaching solution was acidified with sulfuric acid and is substantially free of impurities,By neutralizing the solution with Lime and / or Limestone.The Neutralization is carried out in at least two phases, therefore only a partial precipitation takes place in the first stage,And where the complete precipitation of the metal content valuable remnant is carried out in the last Stage, adding excess neutralizing Agent.The slurry containing Solid remnant of Neutralization agents and precipitates formed in the last stage in the process of Neutralization is returning to the first stage of neutraliCharacterization, possibly after re Dissolving the slurry in the solution of acid leaching comes.The amount of slurry returning along with any neutralizing Agent added handles partial precipitation of the content of valuable metal.The Precipitated hydroxide / Gypsum Free D neutralizing Agent and formed in the first stage, washed and then removes the metal recovery process for the sameIn a known Way.