Modern commercial application of bacterial leaching began in the 1950s at Kennecotts Bingham mine near Salt Lake City, Utah. It was noticed that blue copper-containing solutions were running out of waste piles that contained copper sulfide minerals - a condition that should not have happened in the absence of powerful oxidizing agents and acid.
Mar 29, 2020nbsp018332a copper sulfide concentrate with a grain size of 0.074 mm 90 and a copper content of 24.5 obtained by the flotation concentration of ore from the udokan deposit and ozone with a concentration of 80180 mgl in a mixture with oxygen are used for the study. the concentrate is fed into a stirred reactor at a rate of 15 mls.
Metal sulfide leaching potential in the . metal sulfide leaching potential in the duluth gabbro complex a literature survey the copper and nickel sulfides in the duluth gabbro are combined with. get price
Chalcopyrite cufes2 is commonly used ore in production of copper, but leaching of this ore is very slow and inefficient due to passivation during leaching at atmospheric conditions. in this study, in order to overcome drawbacks of the passivation layers, the concentrate supplied from eti bakr a.. k252re plant in turkey was roasted at 600 176c for 1 h and after leached.
Jun 18, 2020nbsp018332in general, the hydrometallurgical process of sulfide ore including the heap leaching 12, acid leaching 13, and ammonia leaching 14,15. however, there are many drawbacks in the treatment of ...
Copper hydrometallurgy is a branch of metallurgy method to extract copper directly from those difficult-to-concentrate copper oxide ore. traditional copper hydrometallurgy process typically consists of atmospheric leaching, solvent extraction sx and electro-winning ew. it can produce either copper cathode or copper sulphate crystal.
Copper extraction wikipedia. copper smelting technology ... some supergene sulfide deposits can be leached using a bacterial oxidation heap leach process to oxidize ...
Leaching, or low grade sulphide ore that had to be mined in order to expose the underlying high grade sulfide ore. copper recovered from leaching low grade copper ores was considered a bonus and little effort had been made to fully understand the leaching process or to maximize copper recovery. while some fundamental leaching studies had
Jul 27, 2020nbsp018332potential to increase the mill cut-off grade to bolster copper concentrate production, thereby increasing the tonnage of high-grade waste available for leaching
Sep 07, 2018nbsp018332copper sulfate is a common, inexpensive herbicide and algaecide with a number of applications. if you find your sewer line slowed by invasive tree growth, a copper sulfate root treatment can be used to clear the line. some precautions must be taken to apply the copper
453 acid leaching of oxidesulfide copper ore prior the flotation a way for an increased metal recovery miroslav d. soki1, vladan d. miloevi1, velizar d. stankovi2, vladislav lj.matkovi1, branislav r. markovi1 1institute for technology of nuclear and other mineral raw materials, belgrade, serbia 2university of belgrade, technical faculty, bor, serbia
A process for hydrometallurgically recovering copper from concentrates of chalcopyrite and other sulfide and mixed sulfide ores utilizes the pretreatment step of fine grinding of the concentrates coupled with subsequent leaching steps. as a pretreatment for the copper-containing concentrates, the concentrates are ground, preferrably with an attritor-type grinding device, to reduce the particle ...
The present invention provides a method for efficiently leaching copper from copper sulfide ore by separating and recovering iodine, and ironiii ions to be used are regenerated by a heap of stacked ore in the method for leaching copper from copper sulfide using a sulfuric acid solution containing iodide ions and ironiii ions as a leaching solution.
An object of the present invention is to provide a method of recovering copper from primary copper sulfide ores containing chalcopyrite as a main constituent under versatile conditions for real operation in all efficient and cost-effective manner. a method of leaching copper sulfide ores, wherein the growth of microorganisms present on ore surfaces and in a leaching solution is inhibited and ...
Presented paper discusses the copper extraction behavior of commercial copper re-agents with copper sulfide concentrate leach solutions. the performance of lix 984n, lix 612n-lv and acorga m5640 in escaid 100 diluent were investigated. mccabe thiele diagrams were generated, copper net transfer values were compared and dis-cussed. experimental
Copper ore is classified into three groups primary copper sulfide, copper oxide and secondary copper sulfide. leaching copper from primary copper sulfide, such as chalcopyrite, with sulfuric acid takes longer time than from copper oxide and secondary copper sulfide. as such, an oxidant is required to extract copper from chalcopyrite. in this study, column leaching tests were carried out using ...
Apr 23, 2011nbsp018332some supergene sulfide deposits can be leached using a bacterial oxidation heap leach process to oxidize the sulfides to sulfuric acid, which also allows for simultaneous leaching with sulfuric ...
As with oxide ores, sx-ew tech is used to recover copper from a pregnant leach solution. secondary sulfides, which are formed by supergene secondary enrichment, are resistant to sulfuric leaching ...
Feasibility design amp ni 43-101 input. 8,000 metric tonnes per day sulfide processing expansion to an existing 15,000 metric tonnes per day oxide heap leach
Sulfide copper ores have slower kinetics but with good insulation, the internal temperature can be held about 10 176c warmer than ambient increasing dissolution rates. biological leaching is practiced using appropriate bacteria. the lixiviant with copper ores is typically sulfuric acid while sodium cyanide is used with gold ores. the
For copper leaching is 0.1 kg nacnt. if the quantity of copper extracted increases to 300 gt then the cyanide requirement increases to 0.7 kg nacnt. viewed another way, since the 3 moles of cyanide that are complexed with each mole of copper in the leach solution are effectively inactive as far as gold leaching is concerned, the maricunga
Leaching of copper sulfide oresconcentrates and mechanistic considerations, with special attention to the formation of interim compounds and competitive reactions in solid state or solution ii to present a quantitative analysis of published data for the
Recovery of copper from copper sulfide concentrate by. fides and copper sulfide for med copper sulfate, whereas iron sulfide converted mostly to hematite at 500c 9 in the present work, a sulfation roasting-acid leaching process that associated pyrometallurgical and hydro-metallurgical methods has been used for the recovery of copper from a copper sulfide concentrate the reactions.
All the studied copper sulfide minerals could be leached efficiently with a fecl 3 eg solution. other lixiviant systems, namely cucl 2 eg, fecl 3 ethanol and fecl 3 propylene glycol could also extract copper, but they did not perform as well as the fecl 3 eg solutions.
Ausenco developed the escondida bio-leach sulfide project ebp heap leach pad that included innovative design of material handling and an air-injection system to promote bio-leaching. it is the largest single use sulfide leach pad in the world with over 9 mm2 of pad.
Pressure leaching of sulfide concentrates generated through milling of the underlying copper sulfide mineralogy 2 the increase in penalty elements in some ore bodies the principal penalty element being found today is arsenic which is fixed through pressure oxidation, but other elements are