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The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave.
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12, 5 December 2003 () amp; JP 2003 268457 A (MITSUBISHI MATERIALS CORP), 25 September 2003 () DATABASE WPI Section Ch, Week 198111 Derwent Publications Ltd., London, GB; Class M25, AN D XP amp; JP 56 003631 A (SUMITOMO METAL MINING CO) 14 January 1981 () HOLLEMAN, E.
A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100#176; and 200#176; C. until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and contacting the
Slimes generated by the refining of primary copper (copper produced from ores and concentrates) generally contain from 525% selenium and 210% tellurium. Selenium and tellurium are generally present in slimes as intermetallic compounds of silver, copper, and occasionally gold (, Ag2 Se, CU2 Te and (Ag,Au)Te 2 ).
A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about and C. until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and
The treatment of copper scrap consisted of copper smelting and converting, copper electrorefining, anode slimes purification by H 2 SO 4 leach (to remove Cu + Ni), dor#233; smelting and silver electrorefining in a Thum cell, gold mud leaching with aqua regia, gold reduction with SO 2, and selective precipitation of red and yellow salts.
A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100#176; and 200#176; C. until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and contacting the
#0183;#32;There are numerous viable approaches to the treatment of anode slimes from electrolytic copper refining. Of particular interest in the treatment of slimes are the behavior and recovery of selenium. The understanding of the process chemistry involved in the treatment of anode slimes should be aided considerably by recent work on the formation and characterization of slimes.
The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave. The excess of selenium and/or sulphur allows the formation of Ag 2 Se or Ag 2 S, which remains
Copper electrorefining (CuER) is the principal method for producing gt;70% of high or % pure copper cathodes from 9799% pure blister/fire refinedscrap copper anodes. While the inert and most of less soluble impurities settle as anode slime/sludge, other soluble impurities, particularly the metalloids (group VA/15 elements or Q: As, Sb and Bi) and some transition metals (Mt) codissolved
When tellurium and selenium are separated by using the method of this invention from a dissolved solution in which a Bi 2 Te 3based waste thermoelectric material is dissolved, a recovery rate of 97% or more and a separation factor of 400 or more for tellurium may be achieved, and therefore, tellurium and selenium may be separated in a very
mainly from anode slimes produce d from copper electrorefining, which accounts for at least 75 percent of the tellurium rec overed (Goldfarb, 2017). The reduct ion in known copper sulfide
The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave. The excess of selenium and/or sulphur allows the formation of Se or S, which
Copper anode slimes, the byproduct of the copper electrorefining process, have been the subject of extensive investigation for recovering precious metals viz., Au, Ag, Pt and Pd, in addition to being the main source of rare/energycritical elements such as Se and Te. There have been various approaches aiming at the development of extraction processes involving thermal and aqueous approaches
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Anode slime is a byproduct of copper electrorefining process. It contains copper, lead, gold, silver, selenium, tellurium, arsenic, nickel, platinum, silica and other elements. In processing anode slime, extraction of precious metals becomes the main object, especially gold, silver, selenium, tellurium, the US Patent A (Ernst Runyon
#0183;#32;Abstract of EP A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100 and 200 DEG C until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry
A new method was proposed for extracting selenium from copper anode slimes with a low concentration of nitric acid in a sealed sulfuric acid leaching system. It is performed under an atmosphere of oxygen which allowed for a cyclic utilization of nitric acid. The effects of main parameters on selenium leaching were studied. The mineralogical characterizations of the typical samples were
Abstract: A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about and C. until copper, nickel and substantially all of the
Anode slimes contain precious metals like silver, gold and platinum group metals (PGMs), base metals including copper, selenium, tellurium and nickel as well as other impurity elements.
A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100 and 200#176;C until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and contacting the slurry
A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100 and 200#176;C until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and contacting the slurry
Tellurium extraction from copper electrorefining slimes: : Stafiej et al. : Composition for recovering metals and process for using same: : Schwartz, Jr. : Method of tellurium separation from copper electrorefining slime: : Claessens et al. : Flotation composition using a mixture of collectors
This paper focuses on the recovery of tellurium from high telluriumbearing material with similar compositions to the anode slime of copper electrorefining, containing about 50% of copper and 34%
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