Abrégé

A method of extracting copper from a sulfide mineral ore including the steps of stacking the ore to form a heap, in a leach step, irrigating the heap with a first irrigation solution containing an acid nitrate solution and nitrite thereby to cause oxidation of sulfide minerals within the heap, oxidising nitric oxide gas released during the oxidation of the sulfide minerals within the heap by oxygen to form nitrogen dioxide, and hydrolysing the nitrogen dioxide to form nitric acid and/or nitrous acid in the first irrigation solution within the heap, to continue the leach step and to reduce the loss of nitric oxide from the heap.

Classes IPC  ?

• C22B 3/44 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés chimiques
• C22B 15/00 - Obtention du cuivre

Abrégé

An oxidative bioleaching process for leaching a base metal from an ore that includes an ore agglomeration step, an ore stacking step wherein agglomerated ore is stacked to form a heap, a curing step, a rinse step, an inoculation step and a leach step, and wherein, during the ore agglomeration step, the ore is contacted with an acid solution containing nitrate or nitrite thereby to accelerate tthe leaching rate in the leach step.

Classes IPC  ?

• C22B 15/00 - Obtention du cuivre
• C22B 1/14 - AgglomérationBriquetageAgglutinationGranulation
• C22B 3/08 - Acide sulfurique
• C22B 3/18 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés à l'aide de micro-organismes ou d'enzymes, p. ex. de bactéries ou d'algues

Abrégé

A method of leaching copper from a heap of ore which includes an ore agglomeration step, an ore stacking step wherein agglomerated ore is stacked to form a heap, a curing step, a leach step, and a rinse step, wherein, during the ore agglomeration step the ore is contacted with an acidified solution, nitrates or nitrites, and chloride, to create an oxidative environment prior to the leach step.

Classes IPC  ?

• C22B 15/00 - Obtention du cuivre
• C22B 1/16 - FrittageAgglomération
• C22B 1/24 - AgglutinationBriquetage
• C22B 3/06 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés par lixiviation dans des solutions inorganiques acides
• C22B 3/08 - Acide sulfurique

Abrégé

A method of leaching copper from a heap of ore which includes an ore agglomeration step, an ore stacking step wherein agglomerated ore is stacked to form a heap, a curing step, a leach step, and a rinse step, wherein, during the ore agglomeration step the ore is contacted with an acidified solution, nitrates or nitrites, and chloride, to create an oxidative environment prior to the leach step.

Classes IPC  ?

• C22B 1/00 - Traitement préliminaire de minerais ou de débris ou déchets métalliques
• C22B 3/08 - Acide sulfurique
• C22B 3/18 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés à l'aide de micro-organismes ou d'enzymes, p. ex. de bactéries ou d'algues
• C22B 3/44 - Traitement ou purification de solutions, p. ex. de solutions obtenues par lixiviation par des procédés chimiques
• C22B 15/00 - Obtention du cuivre

Abrégé

An oxidative bioleaching process for leaching a base metal from an ore that includes an ore agglomeration step, an ore stacking step wherein agglomerated ore is stacked to form a heap, a curing step, a rinse step, an inoculation step and a leach step, and wherein, during the ore agglomeration step, the ore is contacted with an acid solution containing nitrate or nitrite thereby to accelerate the leaching rate in the leach step.

Classes IPC  ?

• C22B 3/18 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés à l'aide de micro-organismes ou d'enzymes, p. ex. de bactéries ou d'algues
• C22B 15/00 - Obtention du cuivre

Abrégé

A method of controlling the acid balance in a high chloride heap leach process tomaximise the copper dissolution in a cure step and to increase overall copper recovery which include an agglomeration stage in which acid and process solutions are combined with the ore prior to stacking to form a heap followed by a cure phase to leach a portion of the copper in the ore in the heap followed by an irrigated leach phase in which the remaining copper minerals are leached and copper is recovered from a pregnant leach solution by a solvent extraction step followed by an electrowinning step wherein the acid concentration in the pregnant leach solution which reports to the solvent extraction step is less than 10 g/L to allow effective copper recovery from the pregnant leach solution in the solvent extraction step.

Classes IPC  ?

• C22B 15/00 - Obtention du cuivre

Abrégé

A method of maximising the amount of water available for rinsing in a high-chloride heap leach operation which includes the step of using process make-up water in the range of 0.05 to 0.35 m3/ton of ore to rinse leach residue ore, in the heap, thereby to displace a chloride-containing aqueous liquor from the leached ore.

Classes IPC  ?

• C22B 3/10 - Acide chlorhydrique
• C22B 15/00 - Obtention du cuivre

Abrégé

A method of controlling the acid balance in a high chloride heap leach process tomaximise the copper dissolution in a cure step and to increase overall copperrecovery which include an agglomeration stage in which acid and processsolutions are combined with the ore prior to stacking to form a heap followed by acure phase to leach a portion of the copper in the ore in the heap followed by anirrigated leach phase in which the remaining copper minerals are leached andcopper is recovered from a pregnant leach solution by a solvent extraction stepfollowed by an electrowinning step wherein the acid concentration in the prergnantleach solution which reports to the solvent extraction step is less than 10 g/L toallow effective copper recovery from the pregnant leach solution in the solventextraction step.

Classes IPC  ?

• C22B 3/10 - Acide chlorhydrique
• C22B 15/00 - Obtention du cuivre

Abrégé

A method of maximising the amount of water available for rinsing in a high-chloride heap leach operation which includes the step of using process make-up water in the range of 0.05 to 0.35 m3 / ton of ore to rinse leach residue ore, in the heap,thereby to displace a chloride-containing aqueous liquor from the leached ore.

Classes IPC  ?

• C22B 3/10 - Acide chlorhydrique
• C22B 15/00 - Obtention du cuivre

Abrégé

A method of maximising the amount of water available for rinsing in a high-chloride heap leach operation which includes the step of using process make-up water in the range of 0.05 to 0.35 m3 / ton of ore to rinse leach residue ore, in the heap,thereby to displace a chloride-containing aqueous liquor from the leached ore.

Classes IPC  ?

• C22B 3/10 - Acide chlorhydrique
• C22B 15/00 - Obtention du cuivre

Abrégé

A method of controlling the acid balance in a high chloride heap leach process tomaximise the copper dissolution in a cure step and to increase overall copperrecovery which include an agglomeration stage in which acid and processsolutions are combined with the ore prior to stacking to form a heap followed by acure phase to leach a portion of the copper in the ore in the heap followed by anirrigated leach phase in which the remaining copper minerals are leached andcopper is recovered from a pregnant leach solution by a solvent extraction stepfollowed by an electrowinning step wherein the acid concentration in the prergnantleach solution which reports to the solvent extraction step is less than 10 g/L toallow effective copper recovery from the pregnant leach solution in the solventextraction step.

Classes IPC  ?

• C22B 3/10 - Acide chlorhydrique
• C22B 15/00 - Obtention du cuivre

Abrégé

A method of leaching copper from a heap of ore that includes at least one resting step followed by an irrigation step, wherein, during the irrigation step a leach solution that contains chloride ions is applied to the ore at a higher rate than during the resting step.

Classes IPC  ?

• C22B 15/00 - Obtention du cuivre
• C22B 3/08 - Acide sulfurique
• C25C 1/12 - Production, récupération ou affinage électrolytique des métaux par électrolyse de solutions du cuivre

Abrégé

A process of extracting copper from copper sulphide minerals which is enhanced at solution potentials exceeding 700 mV SHE, in the absence of any microorganism, by contacting the minerals in a pre-treatment phase using an acid solution at a high chloride content containing dissolved copper.

Classes IPC  ?

• C22B 15/00 - Obtention du cuivre
• C22B 1/16 - FrittageAgglomération
• C22B 3/06 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés par lixiviation dans des solutions inorganiques acides

Abrégé

A method of leaching copper from a heap of ore which method includes at least one resting step followed by an irrigation step, wherein, during the irrigation step a leach solution that contains chloride ions is applied to the ore at a higher rate than during the resting step.

Classes IPC  ?

• C22B 15/00 - Obtention du cuivre

Abrégé

A method of leaching copper from a heap of ore which method includes at least one resting step followed by an irrigation step, wherein, during the irrigation step a leach solution that contains chloride ions is applied to the ore at a higher rate than during the resting step.

Classes IPC  ?

• C22B 15/00 - Obtention du cuivre

Abrégé

A process of extracting copper from copper sulphide minerals which is enhanced at solution potentials exceeding 700 mV SHE, in the absence of any microorganism, by contacting the minerals in a pre-treatment phase using an acid solution at a high chloride content containing dissolved copper.

Classes IPC  ?

• C22B 1/00 - Traitement préliminaire de minerais ou de débris ou déchets métalliques
• C22B 3/10 - Acide chlorhydrique
• C22B 15/00 - Obtention du cuivre

Abrégé

A process of extracting copper from copper sulphide minerals which is enhanced at solution potentials exceeding 700 mV SHE, in the absence of any microorganism, by contacting the minerals in a pre-treatment phase using an acid solution at a high chloride content containing dissolved copper.

Classes IPC  ?

• C22B 1/00 - Traitement préliminaire de minerais ou de débris ou déchets métalliques
• C22B 3/10 - Acide chlorhydrique
• C22B 15/00 - Obtention du cuivre

Abrégé

A method of recovering copper wherein a copper sulphide mineral is subjected to a chloride leach cycle, and then to a bioleach cycle in which the mineral is heated with a chloride-containing solution from the chloride leach.

Classes IPC  ?

• C22B 3/18 - Extraction de composés métalliques par voie humide à partir de minerais ou de concentrés à l'aide de micro-organismes ou d'enzymes, p. ex. de bactéries ou d'algues
• C22B 15/00 - Obtention du cuivre