Description: technologyComment of indium production (RER): Indium containing residues from hydrometallurgical zinc operations are leached. Subsequent solvent extraction and precipitation of sponge indium. Indium cathodes are cast and electrorefined, followed by vacuum refining to obtain 5N quality. LEACHING AND SOLVENT EXTRACTION WITH D2EHPA This leaching step works on residues from hydrometallurgical zinc extraction. CEMENTATION WITH ZINC POWDER AND ANODE CASTING: Crude indium is formed by the precipitation of a sponge. Here, it is assumed that the sponge contains 20%wt moisture and is dried prior to anode casting. Drying is effected in a spray dryer used in ceramic industry (38kW at 250 kg per hour), Melting is assessed using the heat of fusion and assuming a system efficiency of 70%. ELECTROREFINING: Electricity consumption equals 0.35 kWh per kg indium cathode sheet. VACUUM REFINING: A RF induction heated Vacuum furnace is employed. It uses 0.5 kW per kg load, which corresponds to a batch of 30 kg indium that is heated for 4 hours in a 15kW furnace, and utterly results in a somewhat higher span of 0.5 – 0.3 kW per kg batch. References: Timokhova M. I. (2002) Certain specifics of quasi-isostatic molding (a review). In: Glass and Ceramics, 59(1-2), pp. 22-26, Online-Version under: <Go to ISI>://000177012300007. technologyComment of indium production (RoW): Indium containing residues from hydrometallurgical zinc operations are leached. Subsequent solvent extraction and precipitation of sponge indium. Indium cathodes are cast and electrorefined, followed by vacuum refining to obtain 5N quality. Solvent-extraction and electrowinning has been extrapolated from copper refining.
Types:
Text {
text_type: Report,
}
Comment: This is a market activity. Each market represents the consumption mix of a product in a given geography, connecting suppliers with consumers of the same product in the same geographical area. Markets group the producers and also the imports of the product (if relevant) within the same geographical area. They also account for transport to the consumer and for the losses during that process, when relevant. This is the market for 'indium', in the Global geography. Transport from producers to consumers of this product in the geography covered by the market is included. This market is supplied by the following activities with the given share: indium production, RER: 0.111675126903553 indium production, RoW: 0.888324873096447 generalComment of indium production (RoW): The module describes the primary production of indium metal (99.999%, 5N) on a European average. No secondary sources from post consumer scrap are consid-ered. Only the most important source of indium raw material, the hydrometallurgical zinc operations, is reflected with the dataset. This dataset is based on the respec-tive flow from multi-output module "smelting, primary zinc production". This dataset is not to be used when indium is a substantial part of the system modelled, viz. for comparisons of special solder pastes. [This dataset was already contained in the ecoinvent database version 2. It was not individually updated during the transfer to ecoinvent version 3. Life Cycle Impact Assessment results may still have changed, as they are affected by changes in the supply chain, i.e. in other datasets. This dataset was generated following the ecoinvent quality guidelines for version 2. It may have been subject to central changes described in the ecoinvent version 3 change report (http://www.ecoinvent.org/database/ecoinvent-version-3/reports-of-changes/), and the results of the central updates were reviewed extensively. The changes added e.g. consistent water flows and other information throughout the database. The documentation of this dataset can be found in the ecoinvent reports of version 2, which are still available via the ecoinvent website. The change report linked above covers all central changes that were made during the conversion process.] generalComment of indium production (RER): This dataset describes the primary production of 1 kg of indium metal (99.999%, 5N) on a European average, at plant. No secondary sources from post consumer scrap are considered; only the most important source of indium raw material: The hydrometallurgical zinc operations. Process steps are taken from solvent extraction / electrowinning of copper, given the absence of data specific to indium production, and the many similarities indium production has with copper beneficiation. This dataset is not to be used when indium is a substantial part of the system modelled, i.e. for comparisons of special solder pastes. [This dataset was already contained in the ecoinvent database version 2. It was not individually updated during the transfer to ecoinvent version 3. Life Cycle Impact Assessment results may still have changed, as they are affected by changes in the supply chain, i.e. in other datasets. This dataset was generated following the ecoinvent quality guidelines for version 2. It may have been subject to central changes described in the ecoinvent version 3 change report (http://www.ecoinvent.org/database/ecoinvent-version-3/reports-of-changes/), and the results of the central updates were reviewed extensively. The changes added e.g. consistent water flows and other information throughout the database. The documentation of this dataset can be found in the ecoinvent reports of version 2, which are still available via the ecoinvent website. The change report linked above covers all central changes that were made during the conversion process.]
Origin: /Bund/UBA/ProBas
Tags: Keramik ? Zinkhütte ? Kupfer ? Schwämme ? Keramikindustrie ? Lösungsmittel ? Raffination ? Zink ? Indium ? Elektrizitätsverbrauch ? Wärmeeffizienz ? Literaturauswertung ? Niederschlag ? Ofen ? Manufacture of basic chemicals ? Manufacture of basic chemicals, fertilizers and nitrogen compounds, plastics and synthetic rubber in primary forms ? Manufacture of chemicals and chemical products ? Manufacturing ?
License: unbekannt
Language: Deutsch
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