Novel method for smelting copper through wet process

Abstract

The invention provides a technology for directly producing electrolytic copper through a copper back extraction solution. The technology is used for extracting a copper oxide part in copper ores through acid by adopting a wet-process smelting technology to prepare metal copper; the wet-process smelting technology comprises the following steps: taking sulfuric acid as a solvent and adding the solvent into ore pulp obtained by grinding the ores containing copper oxide and dissolving the copper oxide and other oxides in the ore pulp into a CuSO4 solution; and after carrying out copper extractionand copper back extraction on the CuSO4 solution, directly carrying out copper electrodeposition on the copper back extraction solution to obtain the electrolytic copper. According to the technology,the back extraction solution obtained by copper back extraction is directly subjected to electrodeposition and all electrolytic waste liquid is used for a back extraction procedure, so that a copper extraction flow is simplified, the technology is optimized and the acid consumption and cost also can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of producing electrolytic copper by a lead-copper ore hydrometallurgy process. Background technique [0002] The existing wet copper smelting technology generally adopts a leaching process to leach the copper oxide in the ore with acid. Specifically, sulfuric acid is added to the ore pulp ground with ore containing copper oxide. Under the conditions of acidity, high temperature and stirring, the ore pulp completely dissolves copper oxide and other oxides in the ore pulp into CuSO 4 solution, CuSO 4 Electrolytic copper is obtained from the solution through copper extraction, copper stripping and copper electrowinning. The stripped solution after copper stripping is usually returned to the leaching process for secondary acid leaching. For example, in Chinese patent 200610010938.7, the stripping solution after copper stripping in the process is returned to the leaching process of the wet copper smelting proc...

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Problems solved by technology

For example, in Chinese patent 200610010938.7, the stripping solution after copper stripping in the process is returned to the leaching process of the wet copper smelting process. With this process, the stripping agent contains H 2 SO 4 Usually as high as 150-200 grams per liter, not only the acid consumption is high, but also further purification treatment is necessary in actual production, increasing the purification process, prolonging the production process, increasing the production consumption of coal and purification agents, and pushing up the production cost