Foreign copper leaching - extraction - electrochemical factory | |||||
country | factory | Copper production, t/a | Processing raw materials | Date of production | Remarks |
| 　 | Damu Factory Exploration and Development Company | 7000 | Copper oxide ore dilute sulfuric acid leaching | 1968 | The world's first extraction plant |
| 　 | Ukrainian mine | ||||
| 　 | Baghdad (Arizona) | 7000 | Copper oxide ore dilute sulfuric acid leaching | 1970 | 　 |
nice | Kapital wire company Casag | 2500 | Ammonia immersion liquid of copper scrap and sponge copper | 1970 | Cu2+ extraction ammonia regeneration cycle |
country | Rand Factory | ||||
| 　 | SEC El Paso Factory | 7000 | Acidic Cu-Ni solution from the dielectric workshop | 　 | pH adjustment when extracting copper |
| 　 | Anaconda Corporation (Montana, USA) | 36000 | Ammonia leaching 25% sulfide concentrate | 1974 | 　 |
| 　 | Gold is a chemical company Mesa plant | 　 | Copper shavings | 　 | Using vinyl chloride thinner |
Thumbs up | Enchangjia United Company Kansongxi Mine | 26000 | Oxidized mineral acid immersion liquid | 1977 | 　 |
ratio | |||||
Asian | Enchangjia United Copper Mine Company | 90000 | Low grade oxidized ore tailings leaching solution | 1973 | Three-stage extraction, two-stage extraction |
| 　 | Pu Da Huier Mining Company | 18000 | Copper oxide ore leaching | 1077 | Lix-64N |
| 　 | |||||
wisdom | Domestic company Chuquicamata Mine | 36000 | Copper oxide ore leaching | 1977 | 189/e copper |
Profit | |||||
| 　 | Aguirre Factory (CPA) | 17000 | Thin layer two-stage leaching section rich liquid containing copper 5.5 g / liter | 1981 | The world's first thin layer of dip |
secret | Cerro Verde (Minino) | 33000 | Copper oxide ore heap leaching solution containing copper 5 g / liter | 1977 | Three-stage extraction, three-stage extraction |
Lu | |||||
The extraction method was mainly used to extract rare metals. Due to the high price of the extractant, the application of the copper extraction process is limited. Since the 1970s, the rapid development of the organic chemistry and petrochemical industries has provided conditions for the manufacture and use of new and inexpensive, effective extractants, making it possible to use extraction methods in the industrial production of copper. The remarkable characteristics of solvent extraction are high production efficiency, continuous workability, suitable for industrial scale production, good separation effect, high extraction rate, easy operation, and less “three wastes†during production. Therefore, in recent years, the industrial production of copper extracted by extraction in foreign countries has increased year by year. In 1968, the Lanwu Mine of Arizona's Rancho Exploration and Development Company first built the world's first copper extraction-electrotome plant. Solvent extraction of copper in the world - there are more than ten electro-chemical plants (see table), and the extractants used in these plants are almost all Lix64N.
Due to the strict requirements of environmental protection and the widespread exploitation of oxidized ore in foreign countries, the solvent extraction of copper has received extensive attention and attention. The leaching-extraction-electrowinning method is easy to handle low-grade oxidized ore and mixed ore. As the demand for copper increases, it will lead to the exploitation of low-grade ore. In addition, in order to control the environmental pollution of sulphur dioxide, it will provide more for the extraction method. Wide application prospects.
Zambian Enchangjia United Copper Co., Ltd., an acid leaching-extraction-electrochemical plant with an annual output of 90,000 tons of copper in Jingola, mainly dealing with low-grade copper oxide ore and flotation tailings, using three-stage extraction and two The stage back-extraction process, the extraction ratio is 1:1, about 60~70% of the extract residue is returned to the acid leaching system, and the copper loss is small. The extracting agent Lix-64 is an aromatic oxindole 12-hydroxy-5-dodecyl-tert-benzophene ruthenium, a Lix extractant, which is a chelating agent containing oxindole developed by General Minerals of the United States. Extractant with good extraction properties for copper and nickel .
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