The solvent we would use how we would precipitate the copper from the solution and what we would do with the iron in the electrolyte Without going into the details of the reasons we decided that sulphuric acid would be the most satisfactory solvent and that we would recover the copper from the solutions by electrodeposition As to how we would take care of the iron in the electrolyte we ... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.
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In the copper electrowinning process lead based alloys are used as anodes Soluble cobalt at a concentration ranging from 50 – 200 ppm is added to the copper electrolyte to control the corrosion of the anode and prevent lead contamination of the copper cathode During bleed of copper electrolyte to control iron concentration cobalt is also lost from the system Cobalt must be continually added to the electrolyte
May 01 2011 · The temperature of the electrolyte is maintained at 333 K cathode current varies from 1350 to 2700 Am 2 When the copper concentration falls below 15 gL the electrolyte is drained and used for feed ore leaching Particle size of the powder prior to heat treatment processing ranges from 1 to 25 μm Copper content is excellent 999
This invention relates to a process for electrowinning copper from leach solutions containing a high iron concentration between about 5 and 40 gpl Recovery of copper from relatively dilute
not favour iron hydrolysis during the leach efforts have then to be made downstream to handle the relatively concentrated iron solutions and recover the acid and nickel from them In another example the hydrometallurgical treatment of copper developed significantly after solvent extractants selective for copper over iron were commercialized
The pressureleach expansion was commissioned in 1983 and the operation has been described in detail 4 Since iron is precipitated as sodium jarosite sodium ions are present in the spent electrolyte and some iron is precipitated as sodium jarosite in the lowacid pressure leach The pressure leach residue is washed and impounded along with
Iron oxide ores usually follow a processing path where the copper is leached from the surrounding rock The ore is first heaped into piles in special leaching areas and a sulphuric acid solution is sprayed over the heap to gradually dissolve the copper separating it from the surrounding gangue
The presence of SO2 in the copper electrolyte affects both the cathodic and anodic polarisation curves In addition it causes shifting of preferred orientations from 220 111 200 311 to
Dealloying Selective Leaching and Graphitic Corrosion Causes and Prevention All different types of corrosion are explained by NACE certified Corrosion Specialist 5047 WebCorr provides corrosion consultancy services corrosion expert witness and corrosion short courses for inhouse training online and distance learning corrosion types corrosion forms pipe corrosion generalized
The leaching reagent dilute sulfuric acid is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap where it dissolves the copper from the ore The resulting solution of sulfuric acid and copper sulfate is collected in a small pool Copper concentration is around 65 Next step is solvent extraction