Copper Leaching Practices
Dump Leaching. Dump leaching is used for low-grade and waste material stripped from open- pit operations. Run-of-mine ore materials containing copper in …
Progress in bioleaching: part B, applications of microbial
It can be argued that adoption of SX-EW across the industry enabled the exploitation of relatively low-grade deposits (< 0.5% Cu by weight) through heap and dump leaching (Kordosky 2002) and by extension, bioleaching.Higher-grade deposits can be processed more efficiently through direct smelting or smelting of flotation concentrates.
Influence of Chelating Reagents on Leaching of …
gents to simulated dump leaching 1ixi viants could increase the dissolution of metals and the liquid flow rates. The research was divided into three phases. In phase 1, an assortment of synthetic copper dump 1ixiviants (with and without chelating reagents, molybdenum, titani um, etc.) were prepared, and their pH's
Studies of the Anaerobic Leaching of Iron and Copper Containing Dump
The objective of this study was to investigate the leaching of a non-sulfide copper ore by a new bioleaching process, the Ferredox process. In the Ferredox process, Acidithiobacillus ferrooxidans reduces ferric ions and oxidizes sulfur at low pH under anaerobic conditions. In this study, a bacterial culture (mainly A. ferrooxidans) was …
(PDF) HEAP AND DUMP LEACH PROCESS AT THE …
The leaching of copper maximum in a sample was in the order of leaching of copper in three ores is as Sample C>sample D>Waziristan chalcopyrite. The experiments showed that the untreated raw oxidized copper ore …
Deep well rinsing of a copper oxide heap | Request PDF
The production of the dump leaching plant at Dexing Copper Mining in China was significantly influenced by preferential flow due to the heterogeneity of the ores in dump. Surface tension, negative ...
(PDF) BIOLEACHING OF COPPER ORES AND …
Low-grade ores are treated by dump leaching, while vat leaching can be used to treat higher grade oxide ore. Agitation leaching in stirred tanks is applied to both oxide and sulfide materials: the ...
Heap Leaching Oxide and Sulfide Copper Ores
Dump leaching is used to recover copper from very low-grade oxide-sulfide pit-waste materials. Here again, leach solutions are percolated downward through a heap. However, in this method, little or no acid is added to the leach liquors prepared drainage pads are not used and the leaching cycle is generally measured in terms of several …
Copper Hydrometallurgy
Copper hydrometallurgy the leaching of siliceous low-grade copper-bearing ores and waste rock that cannot be processed economically by milling and concentrating is an important low-cost process for recovering copper. In the free world, the United States is the principal user of this process, and in 1965 nearly 10 percent of the U.S. production of …
Bioleaching: metal solubilization by microorganisms
A: Open-cast mining of copper ore. B: Preparation of dumps for leaching. C: Irrigation by perforated tubes. D: Dump leaching area, covered for insulation. E: Overall view of the leaching operation plant (1: dump leaching area; 2: solvent extraction for copper concentration; 3: collecting pond for the concentrated leaching solution; 4 ...
Extraction Metallurgy of Copper
Hydrometallurgy of copper 2. Leaching (cont.) (a) Dump leaching • Leaching solution trickled over a dump. • Runoff solution collected & the Cu recovered from it. • A slow process that takes months or years to complete. • Typically only around 60% of the Cu in the dump is recovered. Hydrometallurgy of copper 2. Leaching (cont.) (b) …
TENORM: Copper Mining and Production Wastes
Heap Leaching. In contrast to dump leaching, heap leaching refers to the application of chemicals to low-grade ore that has been crushed and deposited on a specially designed pad. The pad is lined with synthetic or natural materials such as polyethylene or compacted clay. Copper heap leach operations are much smaller than …
(PDF) Energy Efficiency & Copper …
In copper dump leaching, run-of-mine ore is irrigated with acidic leaching solution to generate aqueous cupric ions for further processing. The very large size of the ore particles being leached ...
Increasing the Duration of Dump Leaching of Copper …
The successful introduction of the technology of copper production using a dump leaching method is associated with low capital investments, low cost of copper …
Energy and Environmental Profile of the U.S. Mining …
Approximately half of copper beneficiation occurs through dump leaching, while a combination of solvent extraction, froth flotation, and electrowinning is generally used for the other half. Often, more than one metal is the target of beneficiation activities. According to EPA's Office of Solid Waste Technical Resource Document, copper is
LEACHING OF LOW-GRADE COPPER ORES: A CASE …
Oxidation reactions and leaching of copper minerals and pyrite from low-grade copper ores and mining waste (waste rock, overburden, oxidized portions of the ore body) proceed according to the following stoichiometric equations shown in Table 1 [16]. Dump, heap and in-situ leaching are the
Potential Problems in Copper Dump Leaching | PDF
Potential Problems in Copper Dump Leaching By Mark E. Smith, PE Abstract Copper dump leaching is the most rapidly growing copper recovery process. Unlike its predecessors, which are typified by unlined, unmanaged dumps which presented a myriad of environmental concerns and anything but an optimized process circuit, modern dump …
7.4.5: Heap Leaching Method | GEOG 000
7.4.5: Heap Leaching Method. Heap leaching was first used to extract very low grades of metal ore from piles of plant tailings or waste rock. In the case of copper, for example, a solution of sulfuric acid was …
Minerals | Free Full-Text | Bioleaching Process for Copper …
The old Bor flotation dump was active from 1934 to 1980 and includes two fields (fields 1 and 2). ... The highest degree of copper leaching was observed at a stock consistency of 33%. The effect of stirring speed was investigated at 300, 600, and 900 rpm. The time required to achieve the maximum degree of copper leaching was reduced by ...
(PDF) Increasing the Duration of Dump Leaching of Copper …
1.3. The actual copper recovery is not shown, since full-scale testing of the proposed method is. I NCREASING THE DURATION OF DUMP LEACHING OF COPPER UNDER WINTER CONDITIONS 545. 2. gion), where ...
Producing Copper Nature's Way: Bioleaching
In 2001, bioleaching constituted approximately 10% of Chilean copper production and heap and dump leaching, in general, constituted approximately 30% of Chilean production. 2 The first Chilean plant to be put into operation was S.M. Pudahuel. The plant was initiated in 1982 using the Thin Layer Bacterial leach process (TLB) - a water saving ...
Copper Bioleaching in China: Review and Prospect
Keywords: copper bioleaching; biotechnology; heap leaching; dump leaching; review 1. Introduction Due to its excellent ductility and electric and thermal conductivity, copper has been widely applied in the construction, electricity, transportation, and manufacturing industries [1,2]. Since the 1970s,
Study on preferential flow in dump leaching of low-grade ores
Semantic Scholar extracted view of "Study on preferential flow in dump leaching of low-grade ores" by A. Wu et al. ... This paper deals with the investigation of column leaching of low-grade ores from the copper mine Cerovo, Serbia (the approximate Cu content in the ore ranges from 0.2 - 0.3 % with >10 % copper in … Expand. 14 [PDF] …
Hydrometallurgy | SpringerLink
The leach solution composition depends on the type of metal to be extracted, for example, cyanide solution to recover precious metals and acid solution to recover copper metal. The dump leaching approach is normally used to treat low-grade ores assuming that poor recovery rate is achieved due to bigger size materials. Leaching of …
Metal Extraction | SpringerLink
In copper dump leaching the solutions generally contain acid. In gold dump leaching, the solutions generally contain cyanide and hydroxide. The leaching solutions are then passed through a stripping process to concentrate the metal. The leaching solutions are combined with makeup leaching solution before being reapplied at the top of the dump.
Application of aerial image analysis for assessing particle size
In dump leaching, most of the dissolved copper would initially come from the upper parts of the ore bed, where the fines are concentrated. Show abstract. In copper dump leaching, run-of-mine ore is irrigated with acidic leaching solution to generate aqueous cupric ions for further processing. The very large size of the ore particles being ...
Copper Heap Leaching & SX-EW Slideshow
Heap leaching & SX-EW is a method of extracting pure copper from oxide ore by placing the crushed ore on a pad in a heap and spraying the leaching solution, sulphuric acid, over the heap. The acid trickles through the heap and dissolves the copper mineral into solution. The leach solution collects at the bottom of the pad in a collection pond.
Copper leaching, solvent extraction, and electrowinning …
Copper is recovered from subgrade rock by dump or in-place leaching acidified ferric sulfate solutions. The leaching solution migrates down through the rock and dissolves copper. The solution is collected from the base of the dumps and copper is recovered by solvent extraction, electrowinning, or by cementation on detinned more » …
Dump Leaching Copper Recovery
Dump leaching of low-tenor ores is a simple procedure whereby leach solution is distributed over the top of the dump to dissolve the copper minerals as the …
Copper Leaching Method
Extraction of copper from suitable ore by leaching methods is generally assumed to cost less than the combined expense of concentration, smelting, and refining, and experimental data tend to confirm this opinion. At the Butte-Duluth plant, which is handling in excess of 100 tons of oxidized ore daily, the copper is said to cost $0.085 per …
