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6165248 |
Evaluating precious metal content in the processing of scrap materials
A method for evaluating a batch of scrap material, subsequent to processing of the batch, to determine the content of precious metal present in the batch prior to processing of the batch, includes...
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5722929 |
Particle agglomeration with acidic sulphate
An agglomeration process for metallurgical by-products and waste products is described, utilizing the sulphate material present in the metallurgical waste and by-products, which involves reacting...
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5516976 |
Sulphate agglomeration
A process for forming agglomerates of metallurgical dust containing metal sulphates for recycling to extractive processes includes adding lime particles and a small amount of water, forming a...
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5435831 |
Circulating fluidizable bed co-processing of fines in a direct reduction system
A method of producing direct reduced iron from pellets, lumps and fines of iron oxide. A mixture of iron oxide raw material is introduced to an apparatus which separates the lumps and pellets from...
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5211920 |
Agglomerating agents for clay containing ores
Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer preferably in combination with lime provides a highly effective...
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5190578 |
Method for hydrometallurgical processing of friable concentration products
A method for hydrometallurgical processing of friable concentration products containing precious nonferrous and ferrous metals comprising preliminary magnetic separation of friable products to pass...
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5186915 |
Heap leaching agglomeration and detoxification
Agglomerating agent and method for use in heap leaching of mineral bearing ores. A moderate to high molecular weight anionic polymer in combination with lime provides a highly effective...
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4979987 |
Precious metals recovery from refractory carbonate ores
Precious metal values, particularly gold and silver, are liberated from refractory, carbonate ores by adjusting the molar ratio of sulfide to total acid consumers to between about 1.2 and about 3.2...
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4976781 |
Mineral recovery process
Noble metal or diamond values are recovered from ore slurries by contact with pellets of oil, coal and bitumen as a secondary binder. The pellets are of a size above 0.75 mm and contain 2% bitumen...
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4961777 |
Pretreatment/agglomeration as a vehicle for refractory ore treatment
An agglomerative heap leaching method for recovering gold, silver or other metals from low grade refractory ores. Hypochlorite compounds are incorporated directly into the ore agglomerates as they...
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4960461 |
Method and installation for extracting gold from gold ore
The invention relates to a method and apparatus for extracting gold from gold ore. The apparatus and process save capital and operating costs in the extracting of gold from gold ore and include...
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4597791 |
Gold recovery processes
The present invention relates to a process for the separation of gold from particulate material containing gold, which comprises introducing a hydrophobic liquid, a non-gold particulate hydrophobic...
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4585548 |
Recovery of metal values from mineral ores by incorporation in coal-oil agglomerates
Gold ore, or any other mineral treated to have a lyophilic surface, (e.g. chalcopyrites), is ground into a slurry in crusher (1) powdered coal and oil are added at location (2), and the mix is...
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4374097 |
Method for recovering precious metals
Method for extracting precious metals from their ores in which the ore is particulated and mixed with a binding agent to form a paste. The paste material is discharged into a rotary drum at an...
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4256706 |
Leaching agglomerated gold - silver ores
Percolation leaching of gold or silver ores, tailings or wastes is accomplished by a process comprising initial agglomeration of fines in the feed by means of a binding agent and cyanide solution,...
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4019971 |
Method of recovering fine gold from ore
Ore bearing small particles of precious metal which forms an amalgam with mercury is passed in a water-ore pulp first over a positively charged conductive surface to neutralize particles of organic...
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2838391 |
Method of treating sulfur bearing mineral values with molten sulfur to concentrate mineral sulfides
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