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Process For Extraction Of Platinum Free Patents Online
Oct 20 1981 process for extraction of platinum group metals from chromitebearing ore united states patent 4295881 chromite bearing ore containing platinum group metals is mined at 1 by suitable methods and is comminuted at 2 to a sizing suitable for liberation of the chromite grains from gangue and additionally suitable for the magnetic separation
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Extraction Of Gold From Platinum Group Metal Pgm Ores
Jan 01 2005 2 gold extraction from secondary sources the amount of gold that is recycled in the usa is substantial and is in the range of 170200 tpa the main sources of scrap gold include discarded jewellery scrap from jewellery manufacture dental scrap platingbath solutions scrapped electronic equipment gold coins and medals
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Pdf Commercial Processes For The Extraction Of Platinum
Solutions for recovery of platinumgroup metals and rhenium us patent 5542957 the leaching kinetics of an oxide gold ore with the extraction of platinum and rhodium from scrapped
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Method For Extracting Metals From Ore Calif Rafael
The process of the present invention relates to extraction of precious metals from ore and particularly to the extraction from refractory gold ores in general the process for the extraction of precious metals from ore is a sequence three procedures first the ore is crushed then enriched by washing away some constituents of the ore
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Extraction Of Gold From Platinum Group Metal Ores
Jan 01 2016 2 gold extraction from secondary sources the amount of gold that is recycled in the world is substantial and was estimated to be 150 t in 2014 us geological survey 2015a us geological survey 2015bthe main sources of scrap gold in the usa include discarded jewelry scrap from jewelry manufacture dental scrap platingbath solutions scrapped electronic equipment and gold
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The Extractive Metallurgy Of South Africas Platinum Ores
The extraction technology for platinumgroup metals pgms has changed dramatically in the last 80 years and the changes are likely to continue for years to come this article will review advances in pgm extraction including developments in semiautogenous and fully autogenous milling flotation equipment applications for treating highchrome ores increases in power densities for future
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A Goldplatinumpalladium Lode In Southern
Not until recently has the gold and platinum content of the ore been recognized the owners messrs yount amp white discovered the high gold content by sampling and assaying and the boss gold mining co was organized in march 1914 the failure to recognize previously the auriferous character of the ore needs explanation
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Patents Assigned To Newmont Mining Corporation Justia
Sep 29 2000 justia patents patents and patent application resources abstract a hydrometallurgical process for the recovery of one or more metal values from a metal ore material in the presence of clays andor fines material said ore material being comprised of one or more metal values and a matrix material having a sulfur content wherein the sulfur is present in an oxidationreduction
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Method For Extraction And Separation Of Platinum And
The closest technical solution selected as a prototype is a method of extracting platinum group metals from poor sulfate solutions rf patent 2323986 c22b 1100 c22b 324 publ 10052008 including simultaneous translation of platinum metals in activearray form the chlorination and extraction
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Us4671868a Method For Recovering Gold Platinum Or
A method of recovering gold from an ore containing micron gold or gold dust is disclosed the gold is recovered by providing a silver coated surface coating the silver coated surface with mercury washing a mixture of ore and water over the mercury such that an amalgam of gold and mercury is created on the silver coated surface removing the amalgam from the silver coated surface and heating
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Ca2644407c Process For Extracting Gold From Goldbearing
A process for extracting gold from a goldbearing ore the process includes first providing a leaching liquor with thiosulfate anion and ethylenediamine next the leaching liquor is contacted with the goldbearing ore to form a pregnant leach solution including gold dissolved from the goldbearing ore finally at least part of the gold in the pregnant leach solution is recovered
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Us5536294a Process For Extracting Google Patents
A process for extracting precious metal from volcanic ore includes the steps of crushing the ore heating the ore in a hydrogen atmosphere to soften oxide mineral encapsulating the precious metal cooling the ore grinding the ore and processing the ore to extract precious metal
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Extraction Of Precious Metals From Free Patents Online
Jul 12 1994 united states patent 5328669 abstract platinum group metals gold and silver are extracted from complex ores automobile scrap refractory ores and as naturally occurring by leaching the precious metal containing materials with a solution containing halogen salts such as potassium or sodium iodide and bromide in the presence of ammonium ions
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Process For Extracting Gold Silver Platinum Lead Or
Nov 22 1983 1 a process for extracting gold silver platinum lead or manganese metals from ore comprising such metals in steps comprising a pulverizing an ore material comprising gold silver platinum lead or manganese into fine particles b drying the ore particles thoroughly to
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Precious Metal Extraction Process Martenson Irvin
Mar 28 1995 this invention comprises a method for the extraction of gold silver and the platinum metals ruthenium rhodium palladium osmium iridium and platinum from preciousmetalcontaining ores by the use of low cost and relatively small quantities of common chemicals nontoxic to the environment or ground water
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Us4295881a Process For Extraction Of Platinum Group
Us4295881a us06158184 us15818480a us4295881a us 4295881 a us4295881 a us 4295881a us 15818480 a us15818480 a us 15818480a us 4295881 a us4295881 a us 4295881a authority us united states prior art keywords platinum group group metals ore process magnetic prior art date 19790423 legal status the legal status is an assumption and is not a legal conclusion
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Us4353740a Chlorine Extraction Of Gold Google Patents
A process for treating a particulated gold bearing ore to recover the gold therein is disclosed the process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about 350 c in the presence of iron to form a mixture of volatile gold chlorides and volatile goldiron chlorides in the chlorine off gases followed by condensing
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Extraction Of Gold From Platinum Group Metal Pgm Ores
The mechanism for the extraction of gold from aqua regia media produced in the refining of precious metal concentrates with the poiyether dibutylcarbitol dbc has been studied by u v
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Extraction Of Platinum Palladium And Gold By Cyanidation
Apr 01 1994 elsevier hydrometallurgy 35 1994 141159 hydrometallurgy extraction of platinum palladium and gold by cyanidation of coronation hill ore cm mclnnes gjsparrow jt woodcock csiro division of mineral products p 0 box 124 port melbourne victoria 3207 australia received july 22 199 l revised version accepted july 2 1993 abstract the effects of cyanidation conditions
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Platinum Palladium And Gold Extraction From Coronation
Coarse gold but no platinum or palladium was recovered by amalgamation at ambient temperature for material 80 74 m and a cyanidation time of 48 h reducing the cyanidation ph from 115 to 95 increased the palladium extraction from 227 to 664 and the platinum extraction from 57 to 257
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United States Patent And Trademark Office Patent
Process for extracting gold silver platinum lead or manganese metals from ore patent application united states patent and trademark office patent application no 06236997 examiner melvyn j andrews presiding
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Separating The Platinum Group Metals By Liquidliquid
To extract the platinum group metals from the ore and to refine them to the very high purity required for their many applications requires a multitude of complex operations at present the final refining stage that produces the individual platinum group metals is carried out by selective precipitation from a solution of mixed platinum group metals but this is inefficient as far as the
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Extraction Of Platinum Group Metals Intechopen
Oct 02 2017 platinum group metals pgms are a group of six elements namely iridium ir osmium os platinum pt palladium pd rhodium rh and ruthenium ru 1 2pgms together with gold and silver are classified as noble or precious metals because of their high corrosion and oxidation resistance 1 2 3the worlds reserves of platinum group metalselements are estimated at 100 million
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Pdf Characterization And Gold Assaying Methods In The
The head grade for this type of low grade gold ore was found to be in the range of 031 gt to 055 gt where the gold was highly associated with aluminosilicate minerals
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Extraction Of Chromium From Chromite Ore
Table of contentsore sampleschromite ore processingshaker table concentration of dry crushed orechromium ore metallurgyconclusions chromium has a wide variety of applications in the modern world its major uses are in stainless steels and the plating of metals other important uses include alloy steel heating elements pigments leather processing catalysts and refractories of the chromite
