Download or read book Study of Copper Electrowinning and Electrorefining Systems written by R. J. Ollerenshaw and published by . This book was released on 1982 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Electrorefining and Winning of Copper written by J. E. Hoffmann and published by . This book was released on 1987 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Copper 99 Cobre 99 International Conference Electrorefining and electrowinning of copper written by J. E. Dutrizac and published by Minerals, Metals, & Materials Society. This book was released on 1999 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume III contains 33 electrorefining and 15 electrowinning papers. The electrorefining papers provide a valuable record of the status of the industry and summarize research and development work in progress. The electrowinning section outlines the state of the industry and many supporting research activities. Topics include reduction of energy costs, stainless steel plating technology, and techniques to monitor and control impurities in the electrolyte. Lastly, several papers deal with modeling the electrorefining process to obtain better process control and enhance plant automation.

Download or read book Copper Leaching Solvent Extraction and Electrowinning Technology written by Gerald V. Jergensen and published by SME. This book was released on 1999 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume recognizes the growing role of solvent extraction and electrowinning technology in the world copper business. This well-established, remarkable hydrometallurgical achievement fills an important role in our technical ability to extract copper in an efficient and cost-effective way. This proceedings documents the present status of the SX-EW business. It represents a substantial body of historical, scientific, engineering, and commercial information regarding the growth and application of the technology.

Download or read book Copper Electrocrystallization in Electrorefining and Electrowinning Systems written by Ersan Ilgar and published by . This book was released on 1993 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: In electrorefining systems, additives are critical to the control of cathode roughness and irregular growth. In electrowinning, impurities (chloride ion, ferric ion, etc.) are the most influential components that determine the electrocrystallization.

Download or read book Electrorefining Copper at High Current Densities written by United States. Bureau of Mines and published by . This book was released on 1979 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrorefining and Electrowinning of Copper written by J. E. Dutrizac and published by . This book was released on 1999 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Review on Copper Hydrometallurgy written by Roger Rumbu and published by Lulu.com. This book was released on with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Study of the Electrowinning of Copper Using a Fluidized Bed Electrochemical Reactor written by David Lloyd Felker and published by . This book was released on 1982 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Current Density Copper Electrorefining and Electrowinning in a Series Cell written by M. R. Randlett and published by . This book was released on 1974 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Improving the Fundamental Understanding of Copper Electrowinning written by Youness Khouraibchia and published by . This book was released on 2009 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrorefining of Copper from a Cuprous Ion Complexing Electrolyte II Experimental Comparison of Possible Alternative Electrolytes and Preliminary Cost Engineering Analysis written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The energy saving potential and refining capability of three copper(I)/electrolyte systems for the electrorefining of copper were compared experimentally. The alternative electrolyte systems studied were copper(I)/acid chloride, copper(I)/acetonitrile and sulfuric acid, and copper(I)/ammonia solutions. These were compared to the conventional copper(II)/sulfuric acid electrolyte. All of the alternative electrolyte systems demonstrated at least some potential for saving energy when run at an equal deposition rate to the conventional process; the chloride electrolyte showed the greatest energy saving potential, about 70%, and the ammonia electrolyte showed the least, about 25%. All of the alternative electrolyte systems, however, exhibited performance problems, primarily with regard to inadequate separation of impurities. A preliminary capital cost estimate was made for the copper(I)/chloride system. This estimate showed that, for the alternative electrolyte system to be cost competitive (that is, a reduction of capital cost of about 15 to 20%) with the conventional electrorefining process, the refining cells would have to be operated at a current density of about 25 to 30 mA-cm−2. At this current density, the estimated energy saving potential for the copper(I)/chloride system was still about 50%.

Download or read book A Study of Integrated Leaching and Electrowinning of Copper from Chalcopyrite Ore Using Chloride Media written by Prashant Kumar Sarswat and published by . This book was released on 2010 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Advances in Copper Electrowinning written by D. J. MacKinnon and published by CANMET. This book was released on 1976 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study Into the Efficiency of Electrowinning of Copper from Dilute Leach Liquors Using the chemelec Cell written by D. W. Dew and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics and Control of a Copper Electrowinning Process written by D.L. Schwieg and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study on Electrowinning Copper and Zinc from Low Grade Ores written by Marlin John Bennett and published by . This book was released on 1963 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large quantities of copper and zinc bearing ores exist in Oregon. The metals are present as sulfides in small concentrations so that it is difficult and uneconomical to mine them by the conventional sulfuric acid electrowinning process. A new process was developed to make mining of the copper and zinc feasible. In ores of this type an ammonium hydroxide electrowinning process has proved to be more economical and more efficient than the sulfuric acid method. The ore is first ground to approximately 100 mesh and then roasted in air for a few hours at 1200°F. A solution of 15% ammonia in water is then used to leach the copper and zinc from the ore. The ammoniacal solution is selective for copper and zinc since these metals form ammonia complex ions. A countercurrent leaching procedure is recommended since a 91.5% recovery of total copper in 1.5 hours was accomplished in bench scale experiments by this method of leaching. The ammonium hydroxide leach liquor can be reused three times before losing any of its ability to complex the metals. After that time small amounts of concentrated ammonium hydroxide should then be added to the leaching and plating cycle. Experiments showed 0.213 pounds ammonia used per pound of copper refined. The copper is plated from the leach liquor at a current density less than 5.5 amps/ft2. By plating below this limit pure copper may be deposited from the solution without plating zinc. After the copper is removed pure zinc is plated at 20-30 amps/ft2. A current efficiency of 89.2% was obtained in plating the copper with a power requirement of 1.285 kwhr/lb. Cu. The developed process has many advantages over the sulfuric acid electrowinning process now used in the majority of copper and zinc refineries since both copper and zinc can be recovered in one simple process with little extra cost. Ores containing large amounts of iron are very detrimental to the acid process and elaborate purification techniques are needed before the acid process can be employed at all. Iron and lead cause no difficulty in ammonia leaching since they have no tendency to complex. The ammonia leach is much faster which in turn produces a savings in wages and capital investment. An equal cost batch leach of both ammonium hydroxide and sulfuric acid was conducted and the ammonium hydroxide leach showed a 77.6% recovery of total copper in a six hour period while the acid leach produced only a 55.1% recovery. The power cost for the ammonia process was 0.321 cents per pound of copper which is slightly less than the 0.337 cents per pound for the acid process. This process should prove to be beneficial as a means of extracting copper and zinc from predominately sulfide ores. The advantages of the process over the sulfuric acid method are probably enough to make the products competitive with the metals obtained by acid refineries.