The item Acid leaching of oxidized copper ores by downward percolation by McKinney and Carl Rampacek represents a specific individual material embodiment of a distinct intellectual or artistic creation found in University of Missouri Libraries
Get PriceLeaching usually refers to the movement of dissolved substances with water percolating through leaching may also refer to the movement of soluble chemicals out of biological tissues as when rainfall causes potassium and other ions to be lost by foliage A leaching model is a hydrological model by which the leaching with irrigation water of dissolved substances notably salt
Get Pricereducing the acidity of said leach liquor by effecting percolation leaching of a bed of copper ore with said leach liquor … More detailed Leaching definition of Leaching in the Free Online Encyclopedia In one procedure certain crushed ores of copper are placed into a series of tanks … those in which the leaching is
Get PriceA model for the leaching of oxide ores is developed and correlated with laboratory tests for percolation leaching of copper oxide ore using the model recovery of metal values and lixiviant concentration of the effluent solution at any time may be evaluated for the copper oxide ore implified version of the model is examined for the leaching mechanism consisting of
Get PriceThis process uses aqueous water based solutions to extract and purify copper from copper oxide ores at ordinary temperatures usually in three steps heap leaching solvent extraction and electrowinning Heap Leaching and Solvent Extraction of Oxide Ore Heap Leaching is the process of using percolating chemical solutions to leach out metals
Get PriceLeachable copper is the true head grade for heap leaching and the orebody should be modelled accordingly Select the appropriate leachable copper assay procedure Better to start
Get PriceA model for the leaching of oxide ores is developed and correlated with laboratory tests for percolation leaching of copper oxide ore Using the model recovery of metal values and lixiviant concentration of the effluent solution at any time may be evaluated For the copper oxide ore a simplified version of the model is examined for the leaching mechanism consisting of 1 a surface flush reactio
Get PriceBioleaching is used today in commercial operations to process ores of copper nickel cobalt zinc and uranium whereas biooxidation is used in gold processing and coal desulfurization Bioleaching involves the use of microorganisms to catalyze the oxidation of iron sulfides to create ferric sulfate and sulfuric acid
Get PriceIt is generally know n inmetallurgical leaching practice that there is a minimumwdegree of fineness to which ore particles may be crushed for subsequent percolation leaching The reason
Get PriceMoreover it is shown that the amount and distribution of both the leachable and non leachable phases in the slags depend on the ore chemical composition The results are discussed regarding the characteristics and potential leachability of the slags Standard leaching tests were performed to examine the actual leachability Full article
Get PricePercolation Leaching Copper Mine Waste Primary Sulfides 11 Solut The vertical zoning of minerals in porphyry copper deposits was discussed in the preceding chapter Horizontal zoning of the hypogene primary deposit is also Skip to main content Breadcrumbs Section Click here to navigate to respective pages Chapter Chapter
Get PricePretreatment process is used to improve the extraction of copper from sulfide ore Different gangues and clays affect the chemical dynamics in copper heap leaching processes The copper is also extracted by bioleaching in China This is an environmentally friendly approach at a small scale Copper thin film based use in photovoltaics
Get PriceIn percolation leaching the lixiviant perco phases of the ore sample lates by gravity through the metalliferous mass which remains static In general the ore is arranged in heaps trays or columns Agitation leaching As has been shown SO2 emissions and related environmental pro blems may even be exacerbated in reductive percolation
Get PriceThe percolation leaching process is a kind of leaching method in which the leaching agent penetrates the fixed ore bed in a top down or horizontal manner by means of gravity or pressure It is the key to ensuring the economic benefit of the concentrator to choose the appropriate percolation leaching way
Get PricePercolation Leaching Of Copper Ore Drip leaching for mining a r s drip leach irrigation drip leach line the best uniform percolation To meet the unique challenges of the mining industry and to improve the productivity of leaching methods developed the drip leach line an innovative solution comprising a series of dripperlines equipped with highly turbulent labyrinth flat drippers
Get PriceLeaching of copper from a Jordanian copper ore has been studied using a stirred batch reactor with hydrochloric acid as the main lixiviant under the following conditions temperature 25
Get PriceThis invention relates to a process for recovering value metals from sulphide ore including steps of crushing ore in a primary crusher 14 to a size of about 40 cm and less passing the crushed ore through one or more of the following pre beneficiation processes such as bulk sorting 16 and screening 20 followed by coarse floatation 46/50 or gravity separation or magnetic separation
Get PricePercolation Heap leaching see Mular et al pp 1571 1630 loc cit is very widely applied to the ores of copper and precious metals but percolation is also conducted on a smaller scale in batch tanks or vats and in continuous or dump extractors
Get PriceThis well researched process recovers copper cyanide as a precipitate after cyanide leaching This can be of benefit in those gold and copper bearing ores where the copper can interfere in the carbon in pulp recovery of the gold There are many micro organisms and other reagents that can be used in a percolation heap mode
Get PriceA drainage aid comprising ethoxylated aliphatic primary alcohols and mixtures thereof is dripped sprayed or otherwise brought into contact with the heaped metal ore aggregate and thereby improves percolation or drainage of the lixiviant through the heaped metal ore Hydroxyalkylhydroxylamine Oxygen Scavenger In Aqueous Mediums Abstract
Get PriceT h e best prospects therefore are restricted to the continental margins Manganese nodules and especially mid oceanic ridge ores are not easily exploited in spite of successful pilot operations conducted to obtain nodules bearing more than 2 per cent of combinations of cobalt nickel and copper from the depths of the equatorial Pacific Ocean
Get PriceA process for the extraction of copper from a sulphide copper ore or concentrate comprises the steps of subjecting the ore or concentrate to agitation leaching at an elevated temperature and pressure to obtain a resulting acidic leach liquor containing dissolved copper and reducing the acidity of the resulting acidic leach liquor by effecting percolation leaching of a bed of low grade copper
Get PriceThe present invention discloses a new process for leaching sulfide minerals consisting of leaching crushed ore in a vat reactor wherein the leaching solution is fed with an ORP value close to the upper limit suitable for leaching and the exiting leaching solution leaves the reactor with an ORP above the lower limit suitable for leaching the ore
Get PricePercolation leaching means a process for the primary purpose of the recovery of metals in an outdoor environment from a stockpile of crushed or excavated ore by percolating water or a solution through the ore and collecting the leachate and includes the processes known as heap leaching and dump leaching Sample 1 Based on 1 documents
Get Pricecalcium hydroxide is leached away regardless of its initial percolation state Based on computer simulation a volume fraction of 16 20% for the combined capillary porosity and leachable calcium hydroxide phase is sufficient to form a percolated pathway after leaching has taken place [37]
Get PriceAcid leaching of oxidized copper ores by downward percolation [McKinney William A ] on FREE shipping on qualifying offers Acid leaching of oxidized copper ores by downward percolation
Get PriceCopper Solvent Extraction BASF Leaching copper from oxide ores low grade secondary sulfide ores and primary sulfide BASF South Africa Pty Ltd 852 Sixteenth Road Midrand P O Box 2801 Halfway House 1685 South Africa Phone 27 11 203 2400 Fax 27 11 203 2431 Australia BASF Australia Ltd Level 12 28 Freshwater Place
Get PricePercolation leaching in its various forms plays an important role in the extraction of commodities from increasingly marginal ore deposits As part of ore characterisation aspects such
Get PriceAmmoniacal Percolation Leaching of Copper Ores J E Dutrizac Published 1 July 1981 Materials Science Chemistry Canadian Metallurgical Quarterly AbstractThe general feasibility of ammoniacal percolation leaching of copper sulphide ores has been demonstrated
Get PriceThese are mainly the non energy mineral resources which occur in the earth s crust ores of aluminium copper and mercury and deposits of fertilizer nutrients phosphate stock and potassium and minerals used in their natural state microbial Nature of Environmental Studies and Natural leaching technique restoration
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