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Recovering Cadmium & Tellurium from Scrap

Mar 08, 2018· The tellurium-containing leach residue also contained glass, sulfur, and other foreign matter from the scrap. However, standard methods of oxidative leaching followed by selective reduction of tellurium should allow for separation of the tellurium from the sulfur and inert materials. Cadmium Recovery

Electrochemical recovery of tellurium from metallurgical ...

Nov 08, 2019· Based on the study, a new, combined two-stage electrochemical recovery process of tellurium from Doré slag PLS is proposed: EW followed by EDRR. Graphic abstract. Introduction. Tellurium is a metalloid element, which is currently produced primarily as a by-product of copper electrorefining via anode slime treatment [2, 3].

USGS Mineral Resources Program Te [Kr]5s24d10 5p4 ...

refining process, which cannot extract tellurium. A global decrease in high-grade copper ores could therefore constrain tellurium recovery and increase the likelihood tellurium would be recovered from gold deposits. In the United States, tellurium demand is …

A Novel Process For Recovery Of Te And Se From Copper ...

The tellurium and selenium are precipitated from the leach liquor as copper telluride and copper selenide and separated from the solution by filtration. In order to improve the reaction efficiency and reduce the process cost, viz. minimize the copper addition, cut retention time, and reduce the energy consumption; a chemical reducing agent is ...

An environmental-friendly process for recovery of ...

Nov 01, 2020· In the present study, a novel process for effective recoveries of Te and Cu from copper telluride from anode slime processing in copper smelters was proposed. The process consists of two hydrometallurgical steps of atmospheric alkaline leaching for Cu and Te separation, and TeO 2 precipitation with H 2 SO 4 for Te recovery.

US20100326840A1 - Process for the recovery of tellurium ...

A process and method for recovering elemental tellurium from minerals and acidic solutions using a reducing sugar as the reducing agent in order to reduce and precipitate tellurium as tellurium dioxide (TeO 2 ) from which elemental tellurium may be recovered.

Process for recovering or purifying selenium - Mitsubishi ...

A process for purifying selenium, having utility in the recovery of selenium from a selenium-containing material containing one or more of sulfur, tellurium, arsenic, …

Process for separating selenium and telurium from each ...

Process for recovering selenium as selenium dioxide from copper refinery slimes: : Clark: 423/509: 2076738: Recovery of tellurium: : Martin et al. 423/510: 2039256: Process of treating refinery sludges or slimes containing selenium and tellurium: : Martin et al. 75/99

Tellurium plant to be built at Rio Tinto's Kennecott mine ...

Mar 10, 2021· In addition to tellurium, the smelting process at Kennecott yields gold, silver, lead carbonate, platinum, palladium and selenium. Cobalt price …

Rio Tinto to recover tellurium from waste at Kennecott ...

Mar 08, 2021· The plant will recover tellurium from waste already being produced as a result of the copper smelting process. It will have capacity to produce roughly 20 tonnes of tellurium per year, with production beginning in the fourth quarter.

A novel and clean process for extracting tellurium and ...

Jan 01, 2020· The tellurium in anode slime can be recovered by combining the pyrometallurgical and hydrometallurgical process. The pyrometallurgical treatment methods for anode slime include oxidizing roasting and soda ash roasting, soda ash smelting, cupellation, sulphation roasting, etc. (Makuei and Senanayake, 2018).

Recovery of tellurium from high tellurium-bearing ...

Recovery of tellurium from high tellurium-bearing materials by alkaline pressure leaching process: Thermodynamic evaluation and experimental study. Author links open overlay panel Youqi Fan a Yongxiang Yang b Yanping Xiao c Zhuo Zhao a Ying Lei a. Show more. Share. Cite.

Rio Tinto Plans New $2.9M Tellurium Recovery Plant ...

Mar 08, 2021· Metals and minerals firm Rio Tinto said Monday it will construct new facility that will recover the mineral tellurium from copper smelting byproducts at its Kennecott mine near Salt Lake City, UT. The $2.9 million plant will be capable of producing 20 tn/yr of tellurium. "Adding tellurium to our product portfolio provides customers in North America with a secure and reliable source of ...

Processing technologies for gold-telluride ores

tive process. Roasting consists of heating the ores/concentrates below the fusion point in contact with air, oxygen, water vapor, carbon, sulfur, or chlorine. This aims to produce the desired chemical and/or physical change that will be beneficial to downstream processing for the recovery of the metal [8]. Roasting may be realized through one of

Rio Tinto to build tellurium plant at Kennecott copper ...

Mar 09, 2021· Rio Tinto to build tellurium plant at Kennecott copper mine in US. 09 Mar 2021. Metals and mining company Rio Tinto has announced plans to build a new plant to recover tellurium from copper refining at its Kennecott mine in the US. The new plant will have 20 tonnes of tellurium production capacity per year. Credit: JacquieS from Pixabay.

Electrochemical recovery of tellurium from metallurgical ...

above 300 ppm, whereas at lower concentrations EDRR is favoured. The purity of recovered tellurium is investigated with SEM–EDS (scanning electron microscope–energy dispersion spectroscopy). Based on the study, a new, combined two-stage electrochemical recovery process of tellurium from Doré slag PLS is proposed: EW followed by EDRR.

Selective Recovery of Tellurium from the Tellurium-Bearing ...

sodium carbonate slag, which is considered to be an important resource for tellurium recovery [13]. Tellurium separation and purification from tellurium-bearing sodium carbonate slag (TSCS) is a complex process involving many tellurium intermediates, and the …

Tellurium - USGS

Tellurium (Te) is a very rare element that averages only 3 parts per billion in Earth's upper crust. It shows a close association with gold and may be present in orebodies of most gold deposit types at levels of tens to hundreds of parts per million. In large-tonnage mineral deposits, such as porphyry copper and seafloor volcanogenic massive sulfide deposits, sulfide minerals may contain ...

How to recover tellurium from tellurides? - Laboratory ...

Tellurium was then recovered from the solids residue by leaching with sodium sulphide I think. The Tellurium was precipitated with sodium sulphite after the leach solution was filtered. From memory Hisshion developed this process. By the time I was there in the late 70's we didn't produce Tellurium as it …

Rio Tinto to build new tellurium plant at Kennecott mine ...

Mar 08, 2021· March 8, 2021. 766. Salt Lake City — Rio Tinto will begin construction on a new plant that will recover tellurium, a critical mineral used in solar panels, from copper refining at its Kennecott mine near Salt Lake City, Utah. Rio Tinto is investing $2.9 million to set up the plant, which will recover tellurium as a byproduct of copper ...

Bacterial recovery and recycling of tellurium from ...

mediated tellurium recovery process. Methods and Results: We show that the hydrothermal vent microbe Pseudoalteromonas sp. strain EPR3 can convert tellurium from a wide variety of compounds, industrial sources and devices into metallic tellurium and a gaseous tellurium species.

Tellurium extraction from copper electrorefining slimes ...

Jul 27, 1998· Some metallic silver is also precipitated with the tellurium. Metallic tellurium is then recovered from the cementation product through a smelting operation. U.S. Pat. No. 3,127,244 discloses a process for separately recovering selenium and tellurium having an oxidation state of from +2 to -2 from copper electrorefining slimes.

Recovery of tellurium from high tellurium-bearing ...

Jul 01, 2013· Tellurium was discovered in 1782 in a mineral containing tellurium and gold. In the 1930s, with the tellurium widely used, the industrial production of tellurium developed rapidly ().The largest consumer of tellurium is metallurgy (Micheal, 2011), where it is used in iron, copper and lead alloys to make them more machinable.Tellurium is also used in semiconductor and electronics …

Recovery of tellurium from high tellurium-bearing ...

Aug 01, 2017· A novel process of tellurium recovering from high tellurium-bearing materials was proposed. • Tellurium was transformed to soluble thiotellurate (TeS 4 2 −) when the tellurium-bearing material dissolves in Na 2 S solution.. The thiotellurate was decomposed by sodium sulfite with precipitation of elemental tellurium.

Recovering Selenium and Tellurium from copper refinery ...

View Recovering Selenium and Tellurium from copper refinery slimes.pdf from CHE INORGANIC at Technological Institute of Parral. Overview Recovering Selenium and Tellurium from Copper Refinery

A novel and clean process for extracting tellurium and ...

Jan 01, 2020· In the pyrometallurgical treatment, tellurium can be converted into soluble or insoluble forms according to the needs of subsequent processes. Then, tellurium is recovered in the hydrometallurgical process. However, due to the long process, the recovery of tellurium is usually <70% (Ludvigsson and Larsson, 2003; Wang, 2011).

Identification and Description of Mineral Processing ...

the recovery of tellurium metal and purification of the recovered tellurium. The process f low diagrams for a typical recovery process are presented in Exhibits 1 through 3. Exhibit 1 shows the s teps involved in producing tellurous acid from copper anode slimes. The process flow diagrams for two methods of recovering tellurium metal from

Recovery of tellurium from high tellurium-bearing ...

Jul 01, 2013· In order to recover tellurium selectively and keep other elements such as copper and selenium not entering the solution, the ideal thermodynamic conditions should fall in the stable regions of 6, 7 or 8 in Fig. 3. However these three regions are relatively narrow, and the practical production is difficult to control.

Rio Tinto to build new tellurium plant at Kennecott mine

08 March 2021. share. SALT LAKE CITY-- (BUSINESS WIRE)-- Rio Tinto will begin construction on a new plant that will recover tellurium, a critical mineral used in solar panels, from copper refining at its Kennecott mine near Salt Lake City, Utah. Rio Tinto is investing $2.9 million to set up the plant, which will recover tellurium as a byproduct ...

Recovery of tellurium from decopperizing leach solution of ...

Jun 01, 1992· A process is proposed for the recovery of tellurium from the decopperizing leach solution of copper refinery slimes. At present, in the Naoshima Smelter and Refinery, tellurium is recovered as copper telluride from the decopperizing leach solution by precipitation with metallic copper.

An environmental-friendly process for recovery of ...

The process consists of two hydrometallurgical steps of atmospheric alkaline leaching for Cu and Te separation, and TeO2 precipitation with H2SO4 for Te recovery. The effects of NaOH concentration, liquid to solid ratio, temperature, H2O2 to Cu2Te mole ratio, and reaction time on the dissolution behavior of tellurium were investigated.

US8268285B2 - Process for the recovery of tellurium from ...

A process and method for recovering elemental tellurium from minerals and acidic solutions using a reducing sugar as the reducing agent in order to reduce and precipitate tellurium as tellurium dioxide (TeO 2 ) from which elemental tellurium may be recovered.

dore, precious & minor metals, refining & extracting ...

Their market value justifies a specific processing allowing to concentrate and to recover Special Metals. They are used as high purity compounds in new technological applications, such as Photo Voltaic Solar Pannels. In particular the price of Tellurium culminated a …

PROCESS FOR THE RECOVERY OF TELLURIUM FROM MINERALS …

A process and method for recovering elemental tellurium from minerals and acidic solutions using a reducing sugar as the reducing agent in order to reduce and precipitate tellurium as tellurium dioxide (TeO2) from which elemental tellurium may be recovered.

Process of treating refinery sludges or slimes containing ...

Process of recovering tellurium from slimes containing the same, which comprises subjecting the slimes to a sulphatizing roast, subsequently oxidizing the tellurium content with a reagent, then treating the leach solution with a neutralizing reagent whereby the tellurium is precipitated, and further purifying the precipitated tellurium by ...