Description: technologyComment of limestone production, crushed, washed (RoW): The company works on a technically high level; heavy machines (excl. building machines) are operated electrically; air recirculated in closed loop to avoid dust emissions; ground water used for washing.
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 'limestone, crushed, washed', in the Global geography. In this market, expert judgement was used to develop product specific transport distance estimations. The product "limestone, crushed, washed" represents 1 kg of washed crushed limestone. Limestone is a naturally occurring mineral that consists principally of calcium carbonate but may also contain magnesium carbonate as a secondary component. It is found in many forms and is classified in terms of its origin, chemical composition, structure, and geological formation. Limestone occurs widely throughout the world and is an essential raw material for many industries. Limestone is generally used for construction, cement, quicklime, agriculture, metal refining and flue gas desulphurisation: Construction: Limestone is the most widely used crushed rock, although it is generally sold in form of sand and gravel. Cement: The production of cement is the main use for chalk, and a major use for dense, high-calcium limestone. Quicklime: Approximately 1.8 t of limestone is required per 1.0 t of quicklime. Agriculture: Many crops grow best under neutral to slightly acid conditions (i.e., pH between 6 and 7). Thus soils which are more acidic than pH 6 generally benefit from the application of limestone. Metal refining: When limestone is used in metal refining it is initially converted to quicklime, which reacts with acidic oxides (e.g., SiO2, Al2O, and Fe2O3) to produce molten slag. Flue gas desulphurisation: A growing use of limestone is in the treatment of flue gas from combustion processes to remove sulphur dioxide. This market is supplied by the following activities with the given share: limestone production, crushed, washed, RoW: 1.0 generalComment of limestone production, crushed, washed (RoW): Infrastructure data are estimated based on a site visit and sketches of the process. The value of the infrastructure is normalized with a annual production capacity of about 195'000 tons of product per year. The estimated lifespan of the machines is 25 years. Assumed size partition of dust emissions for crushing, screening and transport processes: 50% >10µm (PM10), 45% between 10 µm and 2.5 µm, 5%<2.5 µm. Limestone, crushed, washed is a pre-product for the milling process. 50% of the electricity consumption is covered by the grid and 50% by a hydropower plant nearby. The infrastructure for electricity transportation from power plant to KFN is not included. 50% of the electricity consumption is covered by the grid and 50% by a hydropower plant nearby. The infrastructure for electricity transportation from power plant to KFN is not included.
Origin: /Bund/UBA/ProBas
Tags: Staubemission ? Gebäude ? Kalkstein ? Grundwasser ? Mining and quarrying ? Other mining and quarrying ? Quarrying of stone, sand and clay ?
License: unbekannt
Language: Deutsch
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