The treatment of copper refinery anode slimes | SpringerLink

W.C. Cooper, “A Review of Processes for the Treatment of Copper Refinery Anode Slimes with Particular Reference to Selenium Behaviour and Recovery,” final report on project no. 169/02/87, Energy, Mines and Resources Canada, CANMET, Ottawa, Canada K1A 0G1 (August 1989).

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About Copper Slimes - copperalliance.eu

Slimes and sludges, copper electrolytic are defined as : A complex combination of insoluble compounds produced by precipitation during the copper electrolytic refining or winning processes. It consists typically of various metals (such as precious metals, copper, antimony, tin, selenium, tellurium, arsenic, lead and nickel), as well as their ...

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Sequential removal of selenium and tellurium from copper ...

This is probably because selenium and tellurium tend to disperse into different process products and thus are difficult to recover. According to the properties of selenium and tellurium, soda roastingíacid leaching process is a cost-effective approach for recovering selenium and tellurium from anode slimes.

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Recovering selenium and tellurium from copper refinery slimes

The significant amount of selenium and tellurium present in copper refinery slimes often makes the recovery of these elements not only desirable, but economically viable. While a variety of processes have been developed to this end, some are more feasible because they recover greater values and are environmentally safer.

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Mineral Resource of the Month: Tellurium | EARTH Magazine

A relatively rare element, tellurium is tied with platinum and palladium as the 71st most abundant element in Earth’s crust. Tellurium belongs to the chalcogen chemical family, along with oxygen, sulfur, selenium and polonium. Oxygen and sulfur are nonmetals, polonium is a metal, and selenium and tellurium are metalloids. However, selenium and tellurium are often referred to as metals when ...

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US5939042A - Tellurium extraction from copper ...

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 ...

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Selenium and Tellurium Statistics and Information - usgs.gov

Tellurium is a relatively rare element, in the same chemical family as oxygen, sulfur, selenium, and polonium: oxygen and sulfur are nonmetals, polonium is a metal, and selenium and tellurium are semiconductors (i.e., their electrical properties are between those of a metal and an insulator).

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Selenium and Tellurium 2013 - IBM

SELENIUM AND TELLURIUM 14 Selenium and Tellurium Selenium and tellurium metals are recovered as by-products during copper, lead-zinc, gold and platinum ore processing. The principal sources of selenium are sulphide deposits and anode mud or slime obtained during electrolytic refining of copper. Tellurium is found mostly in

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Selenium and Tellurium IMYB2014 - IBM

SELENIUM AND TELLURIUM 14 Selenium and Tellurium S elenium and tellurium metals are recovered as by-products during copper, lead-zinc, gold and platinum ore processing. The principal sources of selenium are sulphide deposits and anode mud or slime obtained during electrolytic refining of copper. Tellurium is found mostly in

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STDA---Selenium Tellurium Development Association

The impurities dissolve in the electrolyte or settle as slimes to the bottom of the cells. Present in the slimes as selenides and tellurides of copper, gold, and silver, Se and Te are separated by various processes, and are further refined into commercial product forms and compounds. ... Selenium-Arsenic Alloys Selenium-Tellurium Alloys ...

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Selenium | Se - PubChem

Slimes generated by the refining of primary copper, copper produced from ores and concentrates, generally contain from 5-25% selenium and 2-10% tellurium. ... Some of the first processes to recover selenium on a commercial basis were based on roasting of copper slimes with soda ash to convert both selenium and tellurium to

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Effect of Impurities on Gold Slimes Refining Process

Effect of Selenium. Only one sample of zinc box slimes containing an appreciable quantity of selenium was dealt with. It came from the Waihi Mine, N.Z. When the slimes are smelted direct with fluxes, about one or two per cent, of selenium passes into the bullion. This has proved very difficult to remove.

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SELENIUM AND TELLURIUM Indian Minerals Yearbook 2017

SELENIUM AND TELLURIUM 14 Selenium and Tellurium S elenium and tellurium are rare elements widely distributed within the Earth's crust. They do not occur in concentrations high enough to justify mining solely for their content. They are recovered as by-products, mostly from anode mud or slime obtained during electrolytic refining of copper.

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Selenium and Tellurium - USGS

Selenium and tellurium are byproduct metals usually associated with copper production. Primary selenium was produced domestically as a byproduct of copper refining in 2000; secondary (recycled) selenium was not produced. Five electrolytic copper refineries generated selenium-containing anode slimes. One of the refineries recovered commercial-

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CCR Refinery - Recycling Operations | Recycling

The refinery's precious metal slimes processing plant obtains feed from internally generated, as well as externally purchased, slimes. The CCR refinery's products include copper cathodes, gold, silver and other specialty metals and chemicals, including selenium, tellurium, copper sulphate, nickel sulphate and a concentrate of platinum group metals.

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Some Studies on Sulfuric Acid Leaching of Anode Slime with ...

The process involved the leaching of anode slime in sulfuric acid medium. At room temperature, sulfuric acid leaching without any additive resulted in poor recoveries of metals other than copper. With the addition of MnO2 to the leaching system at room temperature, an increase in the recovery values of copper, selenium, and tellurium was found.

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Selenium and Tellurium 2016 - mitra.ibm.gov.in

SELENIUM AND TELLURIUM 14 Selenium and Tellurium S elenium and tellurium are rare elements widely distributed within the Earth's crust. They do not occur in concentrations high enough to justify mining solely for their content. They are recovered as by-products, mostly from anode mud or slime obtained during electrolytic refining of copper.

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Recovering selenium and tellurium from copper refinery slimes

Selenium and tellurium are generally present in slimes as intermetallic compounds of silver, copper, and occasionally gold (e.g., Ag2 Se, CU2 Te and (Ag,Au)Te 2 ). A variety of processes are employed for the extraction of selenium and tellurium from slimes, as well as their separation from each other.

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Selenium and Tellurium from Copper Refinery Slimes and ...

Nearly all the selenium and tellurium traded and consumed commercially is derived from the copper industry in refinery slimes. Invariably, these minor metals which are byproducts of refined copper ...

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Mineral Resource of the Month: Selenium | EARTH Magazine

SELENIUM PRODUCTION AND CONSUMPTION. In 2013, there was one U.S. producer of refined selenium. Another U.S. copper refinery produced and exported semirefined material containing 90 percent selenium for refining in Asia, and one U.S. refinery generated selenium- and tellurium-containing slimes that were exported for processing.

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Tellurium | Te - PubChem

The tellurium content of the slimes can range from trace up to 10%. ... The Selenium Tellurium Development Association also submitted a study that reported an LD50 greater than 5000 mg/kg for tellurium metal. Based on this information, EPA is deleting tellurium from the list of EHSs.

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v116n6a16 Selenium minerals and the recovery of selenium ...

refinery anode slimes for the recovery of selenium. Our focus is on the selenium minerals, including their discovery and occurrence, and the distribution of selenium resources. In addition, the main methods of recovering selenium from copper anode slimes are summarized.;9# 53*2 selenium, selenium minerals, anode slimes.

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Selenium and Tellurium - ibm.gov.in

SELENIUM AND TELLURIUM 14 Selenium and Tellurium S elenium and tellurium metals are recovered as by-products during copper, lead-zinc, gold and platinum ore processing. The principal sources of selenium are sulphide deposits and anode mud or slime obtained during electrolytic refining of copper. Tellurium is found mostly in

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Selenium Mineral Commodity Profile - USGS

available from copper electrorefining, so part of the selenium-containing anode slimes from the refining cells was stockpiled during the interwar years. When the market for selenium grew larger in the 1940s, the stockpiled anode ... and tellurium below 1 to 2 parts per million (ppm). It is sold as shot or powder. Ultrahigh grade is 99.999 to 99 ...

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Selenium - Wikipedia

Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic.It rarely occurs in its elemental state or as pure ore compounds in the Earth's crust.

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Optimized Leaching Conditions for Selenium from Sar ...

selenium and tellurium from the anode slimes, in which the decopperised slimes are sulphated in an iron tank containing concentrated sulphuric acid at about 180 °C for four hours. The silver, selenium and tellurium are dissolved in the sulphuric acid, also nickel is sulphated. Wang et al. [2] presented a new hydrometallurgical

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Selenium - an overview | ScienceDirect Topics

Oct 03, 2010· The anode slimes contain copper, mostly as cuprous oxide and additionally, a variety of cuprous silver selenides, cuprous telluride and small quantities of elemental copper. The copper interferes with the processing of the slime to recover selenium and tellurium, especially in pyrometallurgical processing. The first step in the slime processing ...

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Sequential removal of selenium and tellurium from copper ...

This is probably because selenium and tellurium tend to disperse into different process products and thus are difficult to recover. According to the properties of selenium and tellurium, soda roasting−acid leaching process is a cost-effective approach for recovering selenium and tellurium from anode slimes.

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Sequential removal of selenium and tellurium from copper ...

probably because selenium and tellurium tend to disperse into different process products and thus are difficult to recover. According to the properties of selenium and tellurium, soda roasting−acid leaching process is a cost-effective approach for recovering selenium and tellurium from anode slimes. The disadvantage of direct

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Recovering Selenium and Tellurium from Copper Refinery Slimes

The significant amount of selenium and tellurium present in copper refinery slimes often makes the recovery of these elements not only desirable, but economically viable.

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Recovery of Gold and Silver from Copper Anode Slime ...

Feb 15, 2007· This study has shown that gold and silver can be recovered from a complex anode slime containing copper, selenium, and tellurium, but a carefully planned leaching procedure is required. To extract the gold with thiourea, it is necessary to first remove the copper, selenium, tellurium, and most of the silver from the mixture. Once these elements are removed, the gold and most of the remaining ...

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EP0528361A1 - Improved method of tellurium separation from ...

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°C until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and contacting the slurry ...

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Selenium Recovery in Precious Metal Technology - DiVA …

Selenium is mostly extracted from copper anode slimes because the selenium-rich ores are too rare to be mined with profit. When copper anode slimes are processed in a precious metal plant the first step is to remove copper by pressure leach in an autoclave. The anode slime …

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