COPPER RECOVERY FROM SULFURIC ACID LEACH SOLUTIONS
Abstract
Solvent extraction is an effective method for separating and recovering metal ions from aqueous solutions based on their distribution between two immiscible phases. In this process, metal compounds react with organic extractants dissolved in hydrocarbon solvents, such as kerosene, forming hydrocarbon-soluble metal complexes. The extraction and subsequent re-extraction (stripping) of metals can be controlled by adjusting process parameters, particularly the pH of the aqueous phase. The present study focuses on oxidized copper ores located in the dumps of the Kalmakyr deposit. To develop an optimal process for the recovery of valuable metals from productive leach solutions, the initial stage involves evaluating whether the obtained solution can be considered standard and predicting its behavior under conventional extraction conditions. The chemical composition of the solution was analyzed, including the type and concentration of dissolved metals, pH value, presence and concentration of ammonia, chlorides, nitrates, and other relevant components. Based on the established solution characteristics, the feasibility of selectively recovering metals using solvent extraction technology was assessed, providing a foundation for the development of an efficient metal recovery process.
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