High grade copper oxide-containing material sulfuric acid leaching and stage extraction technology
A copper oxide, high-grade technology, applied in the direction of improving process efficiency, etc., can solve the problems of residual acid not being reused, increasing production costs, etc., and achieve the effect of realizing reuse, reducing usage, and reducing interference
Inactive Publication Date: 2013-07-03
有研资源环境技术研究院(北京)有限公司
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But this undoubtedly makes a large amount of residual acid not be reused reasonably, which increases the production cost
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Embodiment 1
[0024] The raw material ore used in this example comes from the Yulong high-grade copper oxide mine in Tibet, my country. The copper content in the ore is 4.5wt%, the copper oxide content is 6.4wt%, the iron content is 22wt%, and the silicon dioxide is 17.3wt%.
[0025] (1) Stirring and leaching of high-grade copper oxide ore with sulfuric acid
[0026] Use a ball mill to perform a one-stage ball mill on the copper oxide ore, and ball mill the ore until the mineral particle size accounting for more than 65wt% of the total minerals is less than 0.074mm; the minerals after ball milling are mixed, and the ore pulp is thickened to a concentration of more than 40wt% by using a thickener. Add sulfuric acid and stir for leaching, the solid-to-liquid ratio is adjusted to a weight ratio of 1:4, the leaching time is 2 hours, the temperature is 30°C, and the pH value at the end point is controlled at 1.0.
[0027] (2) Extraction of copper in leaching solution
[0028] When the leaching ...
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The invention provides a high grade copper oxide-containing material sulfuric acid leaching and stage extraction technology, which is characterized in that high grade copper oxide-containing material is subjected to ball milling, sulfuric acid is added for stirring and leaching, a leachate after solid-liquid separation is subjected to extraction and back extraction, a raffinade of the leachate is returned for leaching, the leached residue after solid-liquid separation is washed through counter current, the washing water is subjected to extraction and back extraction, the raffinade of washing water is neutralized, and the leachate and strip liquor of washing water are introduced in electrodeposition to obtain cathode copper. The high grade copper oxide-containing material sulfuric acid leaching and stage extraction technology solves the contradiction between reacted acid reuse and impurity accumulation during the high grade copper oxide-containing material sulfuric acid leaching and stage extraction process, reacted acid reuse with maximum extent can be realized, the interference of impurity factor can be effectively reduced, the usage amount of lime is reduced, and the neutralized slag quantity is reduced.
Description
technical field [0001] The invention relates to a staged extraction process for wet leaching of materials containing copper oxide, in particular to a staged extraction process for wet leaching of materials containing copper oxide. Background technique [0002] High-grade copper oxide-containing materials usually come from high-grade copper oxide ore and copper-containing waste from secondary resources (dust slag from copper smelting, etc.). Wet leaching is a more effective way to treat this material. Ammonia leaching is generally less used in actual production because of its high requirements on equipment airtightness, while sulfuric acid stirring leaching is the most feasible. The concentration of copper ions in the leaching solution obtained by stirring and leaching with sulfuric acid is generally above 10g / L, and the final pH value is about 1. The usual method of treating this leachate is extraction-electrowinning, and the product is high-purity cathode copper. The hig...
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IPC IPC(8): C22B3/08C22B3/26C22B15/00
CPCY02P10/20
Inventor 刘学温建康武彪武名麟刘国梁
Owner 有研资源环境技术研究院(北京)有限公司