Advances in high-temperature heap leaching of refractory copper

Academia.edu is a platform for academics to share research papers. Advances in high-temperature heap leaching of refractory copper sulphide ores ... Advances in high-temperature heap leaching of refractory copper sulphide ores. PJ Van Staden. Journal- South African Institute of Mining and Metallurgy. See full PDF download Download PDF.

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Management of Copper Heap Leach Projects: A Geologist's …

Copper production by heap leaching, coupled with solvent extraction and electrowinning (SX-EW), is a well-established technology, with an annual output of about …

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[PDF] Dump and Heap Leaching

This paper discusses the concept of applying HPGR technology to the preparation of low grade gold ores for heap leaching. ... ABSTRACT This article reviews agglomeration practices for precious metal and copper heap leaching. Both industries prefer drum to conveyor agglomeration, particularly for clayey ore or ore having a … Expand. 77.

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Analysis of heat conservation during copper sulphide heap leaching

Semantic Scholar extracted view of "Analysis of heat conservation during copper sulphide heap leaching" by D. G. Dixon. ... Semantic Scholar's Logo. Search 221,438,909 papers from all fields of science. Search. Sign In Create Free Account. DOI: 10.1016/S0304-386X(00)00119-5; Corpus ID: 97262765;

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(PDF) THE ART OF HEAP LEACHING | Lee JOHN

The heap leaching of nickel laterites is problematic in that the GAC is around 500 kg/t and this has also restricted the commercialisation of nickel heap leaching. Typical GAC for a copper heap leach is 10 to 40 kg/t H2SO4 acid and GLC for …

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Heap leaching as a key technology for recovery of values …

This paper gives a comprehensive overview of the principles of heap leaching, offers a critical analysis of the economic viability of the process and how …

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Chalcopyrite leaching in novel lixiviants

Chalcopyrite (CuFeS 2) makes up a large and increasing fraction of the world's future copper resources, but is highly refractory to leaching with common lixiviants.Novel lixiviants, less common reagents recently proposed for chalcopyrite leaching and reviewed here, show varying chemical effectiveness and economic potential.

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HEAP LEACHING OF AFRICAN COPPER-COBALT ORES

115 Heap leaching is now largely applied to recover copper from oxidized ores. However it is not yet applied in central Africa. Laboratory tests have been carried out in order to study the feasability of the process to valorize the coppercobalt oxidized ores from Katanga, DR Congo. Laboratory percolation tests studied the main parameters such as flow-rate, acid …

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Minerals | Special Issue : Heap Leaching: The State …

Special Issue Information. Dear Colleagues, Economically-significant quantities of gold, silver, copper, and uranium are currently extracted using heap leaching technology, and the technology is being …

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Copper Mineral Leaching Mathematical Models—A Review

Mineral leaching is the key unit operation in metallurgical processes and corresponds to the dissolution of metals. The study of leaching is carried out in many areas, such as geology, agriculture and metallurgy. This paper provides an introduction to the theoretical background regarding the mathematical modelling of the leaching …

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Heap and tank leaching of copper and nickel from a …

The technical feasibility of ammonia leaching of platinum group mineral (PGM)-bearing Platreef flotation concentrates was investigated as an alternative method for the recovery of base metals before precious metal recovery. The composition of the concentrate sample included 2·02% Cu and 3·17% Ni, mainly as chalcopyrite and …

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Copper sulfides leaching assisted by acidic seawater …

In this regard, to further understand the effects of ASM, this paper critically discussed the pivotal ions (ferric/ferrous ions, cupric/cuprous ions, elemental sulfur, passivation ions, silver catalytic ions, etc.) and its compounds, regeneration behavior in the leaching reaction. ... Copper: Chile: Heap leaching, 200 km to the ocean: 3 ...

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SART for copper control in cyanide heap leaching

This paper explores the basics of SART and makes the case for a simple plant design as applied to the heap leaching circuit. Keywords SART, sulphidization, copper removal, copper cyanide, cyanide ... For proper heap design for cyanide leaching of copper-bearing gold ores, it is necessary to run long-term column tests (typically 60 to 180 days ...

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Heap Leaching

Heap leaching is the most important method of hydrometallurgical copper extraction. Heap leaching is used for treating oxide and lower-grade secondary sulfide ores that contain …

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Development metallurgy guidelines for copper heap leach

This paper outlines a comprehensive, cost-effective testing program for the acid-ferric sulfate heap leaching of oxide, supergene and primary copper ores. It is …

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Development Metallurgy Guidelines for Copper Heap Leach

"This paper outlines a comprehensive, cost-effective testing program for the acid-ferric sulfate heap leaching of oxide, supergene and primary copper ores. It is based on extensive experience in copper heap leaching and uses the many technological advances in the field developed over the past several decades. The approach described …

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Advances in high-temperature heap leaching of refractory copper

Synopsis Acid heap leaching has been extensively applied to the processing of copper oxide ores, with recovery of copper by solvent extraction and electrowinning. Heap leaching has also been extended to the treatment of secondary sulphide copper ores, where oxidative conditions are generated in aerated heaps by the bacteriallyassisted …

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CICE awards pH7 Technologies $1 million to enhance copper …

Heap leaching is one of the most environmentally and economically sustainable mining extraction processes; however, its application is limited to oxide ores only. pH7's proprietary process enables heap leaching for sulfide ores, which accounts for more than 80% of copper deposits around the world.

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[PDF] Copper Extraction from Oxide Ore of Almalyk Mine by …

In this investigation, a laboratory-scale study to extract copper (Cu) from its oxide ore (0.425–11.2 mm particle size) was conducted using varied sulfuric acid (H2SO4) concentrations (0.05–0.5 M) as a lixiviant. Through a physicochemical and mineralogical analysis of real field ore samples from the Almalyk mine heap site (Tashkent, …

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Ore geotechnical effects on copper heap leach kinetics

The geotechnical characteristics of the ore are important in understanding the kinetics of a copper heap leach. These characteristics can indicate potential problems and can be used to determine the semi-quantitative changes in field kinetics as compared with column kinetics. The application of this approach allows a more rigorously based determination …

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(PDF) Investigation into the heap leaching of copper ore …

The paper presents development of ammonia leaching and its nowadays application for copper recovery, including leaching technological conditions, leaching kinetics and means for copper recovery from pregnant leach solutions with an emphasis on solvent extraction and the latest development in the area.

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Copper recovery from Meskani oxide ore using heap leaching …

The Chemical of Africa (CHEMAF) is a hydrometallurgical plant operated in Katanga since 2001. It produces copper metal using a process comprising the sulphuric acid leaching of copper-cobalt oxide ores under reducing conditions (Na 2 S 2 O 5 or SO 2 ) followed by the leach liquor purification by solvent extraction (SX) and electrowinning of copper.

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Feasibility study of detecting acid saturated zones …

Roman Balsamarium Shaped as a Male Head in Feline-Skin Cap from the Territory of Southeast Bulgaria, 2019. The main objective of this article is to present to the scientific community the most comprehensive data on a …

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Bacterial heap-leaching: Practice in Zijinshan copper mine☆

Semantic Scholar extracted view of "Bacterial heap-leaching: Practice in Zijinshan copper mine☆" by Ruan Ren-man et al. ... Semantic Scholar's Logo. Search 221,180,227 papers from all fields of science. Search. Sign In Create Free Account. DOI: 10.1016/J.HYDROMET.2006.03.048; Corpus ID: 95098968;

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Binders for heap leaching agglomeration | Semantic Scholar

Agglomeration techniques are widely used by industry to form fine particles into larger masses that are easier to handle and process. One area where agglomeration is potentially useful is in heap leaching operations. Without agglomeration, fine particles travel through the heap, clogging the spaces between the larger particles and resulting …

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2924 PDFs | Review articles in HEAP LEACHING

Heap leaching is an industrial mining process to extract precious metals, copper, uranium, and other compounds from ore via a series of chemical... | Explore the latest full-text research PDFs ...

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Heap Leaching

Heap leaching is the most important method of hydrometallurgical copper extraction. Heap leaching is used for treating oxide and lower-grade secondary sulfide ores that contain up to ∼2% Cu. The ore is crushed to a uniform particle size (typically 12–50 mm), often agglomerated, and then stacked on large flat-topped heaps in a controlled manner.. …

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Influence of surfactant on permeability of heap leaching of copper …

To improve heap permeability and leaching rate of high mud-content ore, the mechanism of the surfactant accelerated seepage based on both physical chemistry and mechanics of fluids in porous media was introduced. Four steps of surfactant's improving heap permeability were concluded as altering ore wettability, reducing leaching solution …

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Polyacrylamide as an agglomeration additive for copper heap leaching

Process. j o u r n a l h o m e p a g e : w w w. e l s e v i e r. c o m / l o c a t e / i j m i n p r o Polyacrylamide as an agglomeration additive for copper heap leaching K.A. Lewandowski, S. Komar Kawatra ⁎ Department of Chemical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA a r t i c l e i n f ...

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Development of an analytical model for copper heap leaching …

Copper recovery is then modelled by a system of first-order differential equations. The results indicated that the heap height and superficial velocity of leaching flow are the most critical independent variables while the others are less influential under operational conditions applied.

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Heap Leaching

In order to receive a copy of this paper, please contact the PVC Geomembrane Institute. Heap leaching of copper bearing mineral ores began large-scale production in the 1970's. Copper heap leaching uses a dilute sulfuric acid solution, and in the first decade of its commercialization the environmental threat was not considered significant.

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(PDF) Copper heap leaching: Process, principles …

Heap leaching generates a pregnant leach solution (PLS) containing 1–6 g/L Cu²⁺, which is sent to solvent extraction and electrowinning for copper production.

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Study on Column Leaching Behavior of Low-Grade High …

This paper studies the process mineralogy, mechanism, and kinetics of column leaching behavior of low-grade high-calcium–magnesium copper ore. The effect of sulfuric acid concentration, leach solution spraying intensity, and material particle size on column leaching kinetics is discussed. The kinetic analysis of column leaching of …

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Investigation of Affecting Parameters on Heap Leaching …

Heap leaching method is known as cheap method for copper extraction. Presence of clay and acid consumer waste minerals are the most critical issues because they may bring out the process from economic mode. For reduce acid consumption and increasing copper extraction in heap leaching method, about 3 tons sample was taken …

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Recovery of copper values from bio-heap …

This paper presents the experimental results obtained from the bioleaching of low grade copper ores obtained from M/S Hindustan Copper Limited at Malanjkhand through column and heap bioleaching, enrichment of …

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