• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Copper is recovered from ores containing sulfidic copper minerals by forming the ore into a dump leach heap, and substantially saturating (i.e. thoroughly wetting) the ore in the heap with an aqueous strong acid solution containing 100 to 400 g/l H2SO4 and 5 to 50 g/l ferric ion. The ore thus saturated is cured in contact with the strong acid solution for a curing period of at least 2 days, and generally from 5 days to 6 months or even longer, depending on the character of the ore and its permeability by the acid solution. The ore in the heap may be run of mine size, or may be coarsely crushed, again depending on permeability to the strong acid solution. After the curing period, the ore in the heap is washed by percolating through it a weak acid solution containing up to 50 g/l H2SO4 and 5 to 50 g/l ferric ion. The wash solutions are collected and treated for copper recovery. Washing is continued until the copper content of the heap has been largely extracted.
    公开号:SU850013A3
    申请号:SU772488549
    申请日:1977-06-03
    公开日:1981-07-23
    发明作者:Фред Риггс Вильям；Ричард Дальберг Харри；Велос Хайме；Франклин Фаунтейн Джеральд
    申请人:Инспирейшн Консолидейтид Коппер Компани(Фирма)；
    IPC主号:
    专利说明:

    more) may be necessary for effective treatment with the preparation of relatively massive sulphides or minerals scattered in strong, essentially intact rocks, and in particular when such minerals slowly react with a concentrated acid solution (such as: cuprite, tenorite, chalcopyrite and enargite ). For a large amount of ores, the holding period is in the range of 10 to 50 days, which is satisfactory.
    Although ferric ions are in a concentrated acid solution before it is fed to the dump, in some cases they can be obtained or replaced in place by bacterial oxidation or other oxidation of ferrous ions in the treatment solution.
    The washing solution used to extract copper from the ore to be processed in the leach heap is a weak solution of sulfuric acid, which additionally contains ferric ions. PrO1 “The in-one solution initially fed to the heap may contain a small amount of sulfuric acid or does not contain it at all, because This solution is adequately acidified with residual acid contained in the ore as a result of treatment with a concentrated acid solution during ore recovery. However, as the treatment acid is leached from the ore, then a sufficient amount of acid must be poured into the washing solution to maintain the required acid concentration. In most cases, the washing solution should contain from 2 to 25 g / l.
    When using the washing solution, the concentration of ferric ions present in this solution should approach the concentration of strong acid in the treatment solution. Preferably, the concentration of ferric ions in the washing solution should be in the range of 10 to 25 g / l. As in the case of the concentrated acid of the treatment solution, ferric ions can be obtained completely or partially in the washing solution in place of bacterial or other oxidation of ferrous ions contained in this solution when the solution passes through the dump.
    The proposed method can also be applied to leach ores of only copper oxide minerals using concentrated acid and a washing solution not containing ferric ions.
    The method is carried out as follows.
    The mass of copper ore containing some or all of the ore minerals in the sulphide fom is in the form of a heap arranged for the usual heap leaching process. This includes the preparation of a solution-impermeable layer of considerable area and the subsequent laying of ore on this layer.
    for leaching it with the storage of ore to a certain depth. Tubes for distributing the solution are set up on a grid to release to the heap of solutions used to process it. Solutions filtered through the heap are drained from the impermeable layer to a pool or other reservoir to collect the solution, from which the solutions are collected for processing.
    The ore subjected to heap leaching is heaped on a heap with the appropriate thickness. The preferred layer thickness is 3 m, since with thicker layer thicknesses, the solutions leak down through the heap with a tendency to form channels through which a large part of the ore from the heap is passed. However, layers of considerably greater thickness can be used with the condition of applying special precautions against the occurrence of channels or with the laying of successive layers in a pile with their successive leaching. The lateral laying length is limited only by the amount of ore that is processed in a single heap leaching operation.
    Preliminary preparation of the ore to be stored in a heap is required at caivodx minimum sizes. In some cases, it is possible to stack ore from a mine dump into a layer of desired capacity. However, it is usually preferred to conduct large-scale crushing of the ore, for example, to a particle size of 10 cm.
    The method requires that the applied solutions could penetrate into the ore rock and react with the sulphide and other copper minerals found in this ore, such penetration of solutions occurs much easier in the case when the ore is either finely crushed or the size of its particles is small.
    权利要求:
    Claims (2)
    [1]
    The proposed method is not limited to the grade of ore being processed. Very low-grade ores, which are usually processed by heap leaching, can be subjected to the advantageous processing of the proposed method. Similarly, relatively high-grade ores that can be economically profitable by the method of froth flotation can also be processed with the benefit of the proposed method. The total recovered copper from relatively high grade ores (for example, containing 1% copper) approaches the recovery rates obtained from flotation with subsequent leaching or smelting of concentrates; in this way, these processes and the high capital costs associated with carrying out these processing processes can be eliminated. When the ore is laid in piles for leaching on the gasket into the layer of optimum power, a set of pipes that distribute the solution is installed to the upper surface of the layer. The tubes of this set at optimal intervals are made with the installation of spray nozzles through which the treatment solutions can be sprayed uniformly onto the upper surface of the heap. In a typical process, the tubes are located approximately at a distance of 1.829 / from each other, with the spray nozzles being made at equal distances along the length of the tube, so that the ore in the heap will be evenly distributed with treatment solutions. In the first treatment, the heap of copper ore is basically saturated, i.e., the ore in the heap is fully wetted with a solution of saturated sulfuric acid with a content of 100 to 400 g / l, and from 5 to 50 g / l of ionic ferric iron. Then, the saturated ore is left in contact with the concentrated acid solution for a considerable period of time (at least two days), by the end of the aging or aging period the ore in the heap is washed with a dilute solution of sulfuric acid containing from 2 to 50 g / l HjSO and From 5 to 50 g / l of ferric ions. After filtration through the heap, the washing solution is collected in a tank, from which it is pumped out and processed to recover the contained copper. The washing is continued until the copper contained in the heap is almost completely removed. In almost all cases, this is determined by analyzing the copper content in the solution removed from the Heap and stops the leaching process when the copper content in the solution is reduced to 1 g / l or less. Starting from this point on, further flushing can be unprofitable. Typically, such low copper levels occur after approximately 30 days of washing. In almost all cases, washing is continued for 30 days and can be cost-effective further in some cases for a period of up to 90 days or more. In order to obtain an effective washing and good filtration of the H solution, through the dump, a volumetric amount of such a solution is used, amounting to 5 to 10 times the volume of the concentrated acid used to process the ore while it is aged. With smaller volumes, there is no guarantee of effective flushing. Example: A sample of a mixed sulphide-oxide ore weighing 4 tons at entry from the mine is sieved at a screen and a fraction with a particle size of -10 cm is isolated and used for testing. Exposure of ore and impregnation is carried out in a polyvinyl chloride tube with an inner diameter of 29.11 cm and a length of 3.2 m. The base of the tubular column is mounted on a perforated plastic base connected to a drainage pipe supplied to the saturated metal reservoir of the solution. An ore with a particle size of -10 cm is screened to obtain two fractions of -5 cm and +5 cm. This operation is carried out in order to supply 40% of material with dimensions of +5 and 60% with dimensions of -5 cm to the extruder column. The weight of the load filed on the tubular column, 295.1 kg. the content in the starting material is 0.782% of the total copper content and 0.366% acid soluble copper. The process in the tubular column is carried out similarly to heap leaching. The amount of the concentrated acid solution is 7% by weight of the ore by weight. The solution contains 200 g / l 15 g / l of ferric ions. The ore is left for a period of 15 days. After this holding period, the ore is fed with a solution containing 15 g / l of H / jSO and 15 g / l of ferric ions. After 45 days, the column is emptied and samples are taken for annealing. The total copper recovery was 82.1% by the end of the 45-day flush period. Claim 1, Method for heap leaching of sulfide copper ores with a solution of sulfuric acid containing ferric ions, characterized in that, in order to increase the efficiency of the process, leaching is carried out first by saturating the heap of ore with a concentrated solution containing 100-400 g / l of sulfuric acid and 5-50 g / l of ferric ions with an aging for 2-180 days, then a lot of ore is washed with weak
    7 8500138
    a solution containing 2-50 g / l sulfuric acid solution serves 5-15%
    hydrochloric acid and 5-50 g / l of three-three-on-weight ore heaps.
    of tape iron. Sources of information,
    [2]
    2. The method according to p. 1, which is taken into account in the examination of C and with the fact that it is concentrated 1. RJ Metallurgists, 1966, 10G175.
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    同族专利:
    公开号 | 公开日
    US4091070A|1978-05-23|
    CA1093838A|1981-01-20|
    PH12905A|1979-10-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2563623A|1951-08-07|scott |
    US3260593A|1962-09-12|1966-07-12|Kennecott Copper Corp|Process for leaching copper from lowgrade, copper-bearing ore materials|
    US3441316A|1967-07-06|1969-04-29|Anaconda Co|Recovery of metal values by leaching|
    US3574599A|1968-06-25|1971-04-13|Exxon Production Research Co|Mineral recovery|
    US3669651A|1970-04-15|1972-06-13|Kennecott Copper Corp|Reduction of ferric ions in cyclic process of leaching and precipitation of copper|
    GB1328242A|1970-05-21|1973-08-30|Atomic Energy Authority Uk|Processes for recovering uranium values from ores|
    US3728430A|1970-12-14|1973-04-17|Anlin Co|Method for processing copper values|
    US3777004A|1971-05-10|1973-12-04|Hazen Research|Process for heap leaching ores|
    US3726667A|1971-10-29|1973-04-10|Treadwell Corp|Process of leaching sulfide containing materials with hot,strong sulfuric acid|
    US3886257A|1972-11-29|1975-05-27|Lummus Co|Sulfate leaching of copper ores using silver catalyst|
    US4017309A|1975-03-28|1977-04-12|Holmes & Narver, Inc.|Thin layer leaching method|US4301121A|1980-03-24|1981-11-17|Kohorn H Von|Method for leaching metal bearing ores|
    US4318892A|1980-11-10|1982-03-09|Kohorn H Von|Heap leaching device|
    FR2548262B1|1983-06-30|1986-05-09|Mokta Cie Fse|NEW TASTE LEACHING PROCESS|
    US5207996A|1991-10-10|1993-05-04|Minnesota Mining And Manufacturing Company|Acid leaching of copper ore heap with fluoroaliphatic surfactant|
    US6207443B1|1998-03-02|2001-03-27|Placer Dome, Inc.|Method for initiating heap bioleaching of sulfidic ores|
    US6149711A|1999-03-18|2000-11-21|Lane; Richard P.|Method and apparatus for solar heating and distributing a mining leach solution|
    US20050126923A1|2001-07-25|2005-06-16|Phelps Dodge Corporation|Process for recovery of copper from copper-bearing material using medium temperature pressure leaching, direct electrowinning and solvent/solution extraction|
    MXPA03000745A|2000-07-25|2004-11-01|Phelps Dodge Corp|Method for recovery of metals from metal-containing materials using medium temperature pressure leaching.|
    US7476308B2|2001-07-25|2009-01-13|Phelps Dodge Corporation|Process for multiple stage direct electrowinning of copper|
    AT278813T|2000-07-25|2004-10-15|Phelps Dodge Corp|TREATMENT OF MATERIALS CONTAINING ELEMENTAL SULFURIZE BY PRESSURE LYING AT HIGH TEMPERATURE FOR THE PRODUCTION OF SULFURIC ACID AND FOR METAL EXTRACTION|
    EA005464B1|2000-07-25|2005-02-24|Фелпс Додж Корпорейшн|Method for recovering copper|
    US6451089B1|2001-07-25|2002-09-17|Phelps Dodge Corporation|Process for direct electrowinning of copper|
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    US7736487B2|2004-10-29|2010-06-15|Freeport-Mcmoran Corporation|Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solution extraction|
    US6743276B1|2001-08-17|2004-06-01|Richard P. Lane|Method and apparatus for solar heating a mining leach solution|
    JP3948342B2|2002-05-10|2007-07-25|住友金属鉱山株式会社|Method for recovering copper from copper ore|
    AUPS273502A0|2002-05-31|2002-06-20|Technological Resources Pty Limited|Heap leaching|
    AP2057A|2004-06-03|2009-10-21|Univ British Columbia|Leaching process for copper concentrates|
    AP2325A|2004-10-29|2011-11-23|Freeport Mcmoran Corp|Process for recovery of copper from copper-bearingmaterial using pressure leaching, direct electrow inning and solvent/solution extraction.|
    JP5122295B2|2004-10-29|2013-01-16|フェルプスドッジコーポレイション|Process for multi-stage direct electrolytic extraction of copper|
    JP4565025B2|2008-07-23|2010-10-20|日鉱金属株式会社|Leaching method of copper sulfide ore using iodine|
    EP2716775A4|2011-05-27|2015-03-11|Lixivia Ltda|Obtaining a ferric nitrate reagent in situ from a copper raffinate solution in a hydrometallurgical copper process|
    US9683277B2|2013-09-24|2017-06-20|Likivia Process Metalúrgicos SPA|Process for preparing a ferric nitrate reagent from copper raffinate solution and use of such reagent in the leaching and/or curing of copper substances|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/717,500|US4091070A|1976-08-25|1976-08-25|Recovery of copper|
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