Description: technologyComment of manganese concentrate production (GLO): Mining is done 70% open pit and 30% underground, followed by a beneficiation of the ore trough classification. Overburden and tailings are non-sulphidic , they are disposed near the mining site. MINING: Manganese ores are usually mined in open pits. It's been estimated a share of 70% surface mining activities in the mine production in 1994. The deposits are of various nature and therefore the average manganese concentration differs greatly, from Asia with 24%wt to Australia with 48.5%wt and a world-wide average of 35.7%wt manganese content in the ore. Emissions and waste: The major emissions are due to mineral born pollutants in the effluents. Open cut mining generates large quantities of dust, which contains elevated contents of metals. Rain percolate through overburden and accounts to metal emissions to groundwater. Overburden is deposed close to the mine. BENEFICIATION: After mining, the ore is first crushed in several stages with jaw and / or cone crushers, and then subsequently ground with rod and or ball mills and finally screened for classification. In a second step the classified material it is subjected to gravity concentration to separate the metal-bearing particles from the unwanted minerals. For this drum separators and de-watering screens for lumps are used and cone separators and a high-gradient magnetic separator for fine material. No flotation is done. Recovery of Manganese vary in a range from 65% to 75%. Emissions and waste: Ore handling and processing produce large amounts of dust, containing PM10 and several metals from the ore itself. Tailings are deposed as piles and in ponds. Since the tailings are not sulphidic, no acid rock drainage (ARD) occurs. References: Adelhardt W. and Saiger H. (1999) Stoffmengenflüsse und Energiebedarf bei der Gewinnung ausgewählter mineralischer Rohstoffe; Teilstudie Mangan. In: Geo-logisches Jahrbuch, Vol. Sonderhefte SH 8. Bundesanstalt für Geowissen-schaften und Rohstoffe, Hannover. ISBN 3-510-95830-6.
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text_type: Report,
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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 'manganese concentrate', 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: manganese concentrate production, GLO: 1.0 generalComment of manganese concentrate production (GLO): This dataset describes the production of 1 kg of manganese concentrate, at plant, for a world-wide production average in 2003. The dataset is designed for the use of manganese ore as intermediary product in the production of ferromanganese and manganese metal. For the use of this module in the battery manufacture, the data quality may not be sufficient. [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: Hannover ? Mangan ? PM10 ? Mineralischer Rohstoff ? Ackerrandstreifen ? Dränung ? Energiebedarf ? Flotation ? Rohstoff ? Mineral ? Mining and quarrying ? Mining of metal ores ? Mining of non-ferrous metal ores ? Mining of other non-ferrous metal ores ?
License: unbekannt
Language: Deutsch
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