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US8070851B2 Chloride heap leaching Google Patents

A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

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us8070851b2 chloride heap leaching Minevik

Home > Products > us8070851b2 chloride heap leaching. Mobile Crushing Plant. Stationary Crushing Plant. Grinding Mill. Washing & Screening. Three in One Mobile Crusher. Mobile VSI Crusher. Mobile VSI Crusher & Washer. Mobile Crusher & Screen. Mobile Impact Crusher. Four in One Mobile Crusher. CS Cone Crusher. Spring Cone Crusher . HST Hydraulic Cone Crusher. HPT Cone Crusher. Deep Rotor

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WO2007134343A3 Chloride heap leaching Google Patents

A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride or mixed chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

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US20090173188A1 Chloride Heap Leaching Google

A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

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CA2651516C Chloride heap leaching Google Patents

A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride or mixed chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

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Chloride leaching of chalcopyrite ScienceDirect

Chloride leaching offers significant advantages for hydrometallurgical processing, in supporting high metal solubility, enhanced redox behaviour, and increased rates of leaching. In this system, both cuprous ion and cupric ion, as well as several other metal ions are stabilized through complexation with chloride ion ( Winand, 1991 ); and thus has potential for treating complex ores and

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(PDF) Heap Leaching Technology-Current State,

Heap leaching is a well-established extractive metallurgical technology enabling the economical processing of various kinds of low-grade ores, which could not otherwise be exploited.

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Leaching of an oxide gold ore with chloride/hypochlorite

Gold–chloride complex is rather unstable and may re-precipitate upon contact with a reductant, such as sulfidic materials of ore. Puvvada and Murthy (2000) used chloride/hypochlorite solution to leach gold and silver from a chalcopyrite concentrate. Direct hypochlorite leaching of the sulfidic concentrate yielded gold and silver recoveries of 43% and 45%, respectively. After pressure

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Eliminating Copper from Gold Ore

When reviewing Methods of Eliminating Copper from Gold Ores we see that several methods have been suggested When 6 lbs. of ammonium chloride was added to each ton of solution together was sufficient lime to convert all of the ammonium chloride to the hydroxide, the consumption of cyanide was reduced to 1 lb. per ton of ore. The use of cyanides in the extraction of gold and silver is well

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Heap Leaching Mineral Processing & Metallurgy

Heap leaching of gold and silver ores is conducted at approximately 120 mines worldwide. Heap leaching is one of several alternative process methods for treating precious metal ores, and is selected primarily to take advantage of its low capital cost relative to other methods. Thirty-seven different heap leach operations with a total production of 198 tonnes of gold per year (6,150,000 ounces

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Leaching of an oxide gold ore with chloride/hypochlorite

Gold–chloride complex is rather unstable and may re-precipitate upon contact with a reductant, such as sulfidic materials of ore. Puvvada and Murthy (2000) used chloride/hypochlorite solution to leach gold and silver from a chalcopyrite concentrate. Direct hypochlorite leaching of the sulfidic concentrate yielded gold and silver recoveries of 43% and 45%, respectively. After pressure

Get Price

Chloride leaching of chalcopyrite ScienceDirect

Chloride leaching offers significant advantages for hydrometallurgical processing, in supporting high metal solubility, enhanced redox behaviour, and increased rates of leaching. In this system, both cuprous ion and cupric ion, as well as several other metal ions are stabilized through complexation with chloride ion ( Winand, 1991 ); and thus has potential for treating complex ores and

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Recovery of Silver, Gold, and Lead From a Complex Sulfide

ore. A ferric chloride (FeCI3 ) preleach, at 40° C in 6 h, extracted about 50 pct of the zinc and formed insoluble silver and lead chlorides. Subsequent acid thiourea leaching, for 1 to 3 h at 40° C, extracted about 85 pct of the gold and silver. Lead chloride was solubilized from

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CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate 63 Fig. 1. The Pourbaix diagram of Fe–S at [Fe] –= 10 4 M, [S] = 10– M and 25 C (the chlorine species regions are also marked) (Marsden and House, 2005) Fig. 2.

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Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous

aspects of the heap leaching of copper sulfide minerals, Nicol [36] compared the anodic behavior of chalcopyrite at high potentials (transpassive region) in both sulfate and chloride solutions. Nicol et al. [37] studied the voltammetric characteristics of chalcopyrite under various conditions appropriate to low temperature leaching with acidic chloride solutions while Nicol and Basson [38

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Estimated Water Requirements for Gold Heap-Leach Operations

Estimated Water Requirements for Gold Heap-Leach Operations By Donald I. Bleiwas Introduction This report provides a perspective on the amount of water necessary for conventional gold heap-leach operations. Water is required for drilling and dust suppression during mining, for

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Chloride as an Alternative to Cyanide SGS

Chloride processes for gold extraction . have continued to attract some attention [2,3], although limited. Volatilization of gold chloride has been studied [4,5,6], and gold has been commercially recovered from an antimony-rich slag by chloride hydrometallurgy in South Africa [7]. Other investigators suggested high temperature (170-200ºC) acid pressure oxidation in concentrated chloride (>5 N

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(PDF) Heap Leaching Technology-Current State,

Heap leaching is a well-established extractive metallurgical technology enabling the economical processing of various kinds of low-grade ores, which could not otherwise be exploited.

Get Price

Heap leaching Wikipedia

Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of stone reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the

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