A kind of process method of recovering copper from low-grade copper oxide ore
A technology for oxidizing copper ore and recovering copper, which is applied in the directions of photography technology, photography auxiliary technology, and process efficiency improvement, can solve the problems of large environmental impact, strict equipment requirements, and high production costs, and achieves simple leaching process and simple equipment requirements. Effect
Active Publication Date: 2021-02-19
CHANGCHUN GOLD RES INST
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Problems solved by technology
[0003] At present, the processing technology of low-grade copper oxide ore mainly includes flotation process and leaching process. Flotation process is a common method for processing low-grade copper oxide ore. When the flotation process is difficult to achieve the desired effect
The leaching processes mainly include acid leaching and ammonia leaching. Acid leaching is widely used and is suitable for treating copper oxide ores containing acidic minerals. However, acid leaching has strict requirements on equipment, and the acid consumption of copper oxide ores containing alkaline minerals Large, high cost; ammonia leaching method is suitable for treating copper oxide ore containing alkaline minerals, but sometimes heating and pressure are required during the leaching process, which leads to high production costs and great environmental impact
[0004] Mineral resources are non-renewable resources, but due to the low grade of copper in the ore and the high cost of the existing production process, some low-grade copper oxide ores become waste resources. Therefore, a simple treatment process is developed to improve the efficiency of waste resources. Utilization rate is the main goal of technology development in this industry
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Embodiment 1
[0018] A low-grade copper oxide ore (copper oxide ore with a grade lower than 2%) was selected from a mining company, and its composition is Cu 0.71%, As 0.013%, Pb 0.01%, Zn 0.035%, Fe 7.9%, C 1.44 %, S 0.43%, CaO 16.79%, MgO 11.24%.
[0019] The phase of copper in this ore is shown in Table 1
[0020] Table 1 Copper phase in low-grade copper oxide ore
[0021]
[0022] First adopt single-batch test to prepare raffinate, take above-mentioned 10kg low-grade copper oxide ore (copper grade in ore is 0.71%), through ore grinding and pulping, the ore pulp after grinding and pulping is pumped in the leaching tank, to leaching Add 50kg / t of leaching agent ethylenediamine in the tank, filter after leaching for 48h, and extract the expensive liquid obtained after filtration with N910 copper extractant to obtain raffinate, the copper content in the raffinate is 17mg / L;
[0023] Reuse the above-mentioned raffinate to carry out a method for recovering copper from a low-grade copper ...
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The invention discloses a process method for recovering copper from low-grade copper oxide ore, which realizes high-efficiency utilization of low-grade copper oxide ore resources, and is especially suitable for the treatment of alkaline copper-containing oxide ore; the process features are: the ore is finely ground Slurry is leached by adding chemicals; after leaching, the ore pulp undergoes four-stage dense cycle washing; the raffinate produced by the extraction-electrowinning process returns the raffinate to the grinding, slurry, and leaching process; the chemicals used in this process can be recycled and are not consumed The medicament has simple process, low production cost and good economic and social benefits.
Description
technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a process for recovering copper from low-grade copper oxide ore. [0002] technical background [0003] At present, the processing technology of low-grade copper oxide ore mainly includes flotation process and leaching process. Flotation process is a common method for processing low-grade copper oxide ore. When the flotation process is difficult to achieve the desired effect. The leaching processes mainly include acid leaching and ammonia leaching. Acid leaching is widely used and is suitable for treating copper oxide ores containing acidic minerals. However, acid leaching has strict requirements on equipment, and the acid consumption of copper oxide ores containing alkaline minerals Large, high cost; ammonia leaching method is suitable for the treatment of copper oxide ore containing alkaline minerals, but sometimes heating and pressure are required during th...
Claims
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IPC IPC(8): C22B3/16C22B15/00C25C1/12
CPCC22B3/1625C22B15/0065C25C1/12Y02P10/20
Inventor 李健郑晔郝福来张世镖赵国惠王秀美
Owner CHANGCHUN GOLD RES INST