Description: technologyComment of chromite ore concentrate production (RoW): Mining is done 21% open pit and 79% underground, followed by a benefication of the ore trough classification. Overburden and tailings are disposed near the mining site. MINING: Chromite ores are usually mined underground. An estimated share of 71% underground mining has been reported for activities in the mine production in 1994. This represents 78% of the total production. Of a surveyed part of 52% of the total world production, 69% of the chromite originated from stratiform deposits. 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 percolates through overburden and leads 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 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. The separated gangue is disposed in tailings ponds, the concentrated ore is fed to the metallurgy, which is on-site. Chromite yields vary in a range from 65% to 85%. There's no treatment of wastewater. 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. In the tailings material the most significant contents are Cr and Ni, which occur as insoluble compounds and are considered not to cause any negative effects. References: Adelhardt W. and Antrekowitsch H. (1998) Stoffmengenflüsse und Energie-bedarf bei der Gewinnung ausgewählter mineralischer Rohstoffe; Teilstudie Chrom. In: Geologisches Jahrbuch, Vol. Sonderhefte SH 3. Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover. ISBN 3-510-95831-4. IPPC (2002) Integrated Pollution Prevention and Control (IPPC); Draft Refer-ence Document on Best Available Techniques for Management of Tailings and Waste-Rock in Mining Activities. European Commission. Retrieved at 01.03.2003 from http://www.jrc.es/pub/english.cgi/0/733169 technologyComment of chromite ore concentrate production (KZ): Mining is done both open pit and underground, followed by a benefication of the ore trough classification. Overburden and tailings are disposed near the mining site. MINING: Chromite ores are usually mined underground. An estimated share of 93% underground mining has been reported for activities in the mine production in Donskoy mine operation site (leader in chromite ore production in Kazakhstan), while the remaining 7% is open pit (Kaplunov et al. 2018). 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 percolates through overburden and leads 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 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. The separated gangue is disposed in tailings ponds, the concentrated ore is fed to the metallurgy, which is on-site. Chromite yields vary in a range from 65% to 85%. There's no treatment of wastewater. 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. In the tailings material the most significant contents are Cr and Ni, which occur as insoluble compounds and are considered not to cause any negative effects. References: Adelhardt W. and Antrekowitsch H. (1998) Stoffmengenflüsse und Energie-bedarf bei der Gewinnung ausgewählter mineralischer Rohstoffe; Teilstudie Chrom. In: Geologisches Jahrbuch, Vol. Sonderhefte SH 3. Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover. ISBN 3-510-95831-4. IPPC (2002) Integrated Pollution Prevention and Control (IPPC); Draft Refer-ence Document on Best Available Techniques for Management of Tailings and Waste-Rock in Mining Activities. European Commission. Retrieved at 01.03.2003 from http://www.jrc.es/pub/english.cgi/0/733169 Kaplunov, D., Bekbergenov, D., & Djangulova, G. (2018). Particularities of solving the problem of sustainable development of chromite underground mining at deep horizons by means of combined geotechnology. In E3S Web of Conferences (Vol. 56, p. 01015). EDP Sciences.
Types:
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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 'chromite ore concentrate', in the Global geography. In this market, expert judgement was used to develop product specific transport distance estimations This market is supplied by the following activities with the given share: chromite ore concentrate production, KZ: 0.143536480686695 chromite ore concentrate production, RoW: 0.856463519313305 generalComment of chromite ore concentrate production (RoW): This dataset describes the production of 1 kg of chromite ore concentrate in 1994 for a worldwide production average. It is designed for the use of chromite as intermediary product in the production of ferrochromium, dichromate and refractories. Process data is taken mainly from a material flow analysis for the consumption of chromium compounds in Germany. [This dataset is meant to replace the following datasets:] generalComment of chromite ore concentrate production (KZ): This dataset describes the production of 1 kg of chromite ore concentrate in Kazakhstan. It is designed for the use of chromite as intermediary product in the production of ferrochromium, dichromate and refractories. This data set is adapted from the existing global dataset of chromite ore concentrate production, in which process data is taken mainly from a material flow analysis for the consumption of chromium compounds in Germany. Electricity consumption is estimated from the feasibility study made in 2006 for the Voskhod mine in Kazakhstan using sublevel caving (SLC) and selective mining of metallurgical grade chromite ore (Bleiwas, 2011). Reference: Bleiwas, D. I. (2011). Estimates of electricity requirements for the recovery of mineral commodities, with examples applied to sub-Saharan Africa. US Department of the Interior, US Geological Survey. [This dataset is meant to replace the following datasets:]
Origin: /Bund/UBA/ProBas
Tags: Hirsch ? Hannover ? Chrom ? Mineralischer Rohstoff ? Abfallbehandlung ? Abraum ? Chromeisenerz ? Europäische Kommission ? Staubemission ? Staubgehalt ? Kasachstan ? PM10 ? Abwasserbehandlung ? Erzbergbau ? Magnetabscheider ? Schadstoffemission ? Tagebau ? Metall ? Ackerrandstreifen ? Untertagebau ? Nachhaltige Entwicklung ? Mühle ? Regen ? Dränung ? Abwasser ? Erz ? Abfall ? Grundwasser ? Erzverhüttung ? Flotation ? Bergematerial ? Metallurgie ? Mineral ? Partikel ? Gestein ? Beste verfügbare Techniken ? Klassifikation ? Metallverarbeitung ? Mining of metal ores ? Mining of other non-ferrous metal ores ? Mining and quarrying ? Mining of non-ferrous metal ores ?
License: unbekannt
Language: Deutsch
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