e806b139-fa4c-4995-9816-4b4d6b73612dCasting (aluminum)primary productionconsumption mix, at plantMaterials productionMetals and semimetalsData was collected through the Aluminum Association and the International Aluminum Institute.166North America specific aluminium casting.Molten metal siphoned from the pots is sent to a resident cast house found in each smelter. In some cases, due to proximity, molten metal is transported directly to a shape casting foundry. Molten metal is then transferred to a holding furnace where the composition is adjusted to the specific alloy requested by a customer. In some instances, depending on the application and the bath composition in the pots, some initial hot metal treatment to remove impurities may be done.
When the alloying is complete, the melt is fluxed to remove impurities and reduce gas con-tent. The fluxing consists of slowly bubbling a combination of nitrogen and chlorine or of carbon monoxide, argon, and chlorine through the metal. Fluxing may also be accomplished with an inline degassing technology which performs the same function in a specialized degassing unit.
Fluxing removes entrained gases and inorganic particulates by flotation to the surface of the metal. These impurities (typically called dross) are skimmed off. The skimming process also takes some aluminum and drosses are normally further processed to recover the aluminum con-tent and to make products used in the abrasives and insulation industries.
Depending on the application, metal is then processed through an inline filter to remove any oxides that may have formed. Subsequently, metal is cast into ingots in a variety of methods: open molds (typically for remelt ingot), through direct chill molds for various fabrication shapes, electromagnetic molds for some sheet ingots, and through continuous casters for aluminum coils.
This unit process begins with the processing of molten primary aluminum and ends with the output of sheet ingot suitable for rolling, extruding, or shape casting. The various operations carried out in the cast house include (AA, 1999; IAI, 2005):
# Pretreatment of hot metal (cleaning and auxiliary heating);
# Recovery and handling of internal process scrap;
# Batching, metal treatment, and casting operations;
# Homogenizing, sawing, and packaging and casting operations;
# Maintenance and repair of plant and equipment; and
# Treatment of process air, liquids, and solids.Aluminium Ingots can be used in a number of applications, and for further processing into, for example, sheets, extrusion profiles, foils...Partly terminated systemAttributionalNoneAllocation - market valueAllocation - exergetic contentAllocation - massNoneAll data used in the calculation of the LCI results refer to net calorific value.None1% cut-off criteria applied for non-hazardous inputs & outputs except alloying elements which are not considered. - No cut-off criteria for hazardous products emissions (ex. PAH, PFC, BaP, etc.) - Infrastructure not included. All ancillary processes (electricity, caustic soda, etc.) included.
Cut-off rules for each unit process: Coverage of at least 95 % of mass and energy of the input and output flows, and 98 % of their environmental relevance (according to expert judgement).
For further details please see the document "GaBi Databases Modelling Principles"NoneFor details please see the document "GaBi Databases Modelling Principles"NoneFor details please see the document "GaBi Databases Modelling Principles"NoneLife Cycle Impact Assessment of aluminum Beverage CansLife Cycle Inventory Data Primary Aluminium, 200595.02006The data set represents a cradle to gate inventory. It can be used to characterise the supply chain situation of the respective commodity in a representative manner. Combination with individual unit processes using this commodity enables the generation of user-specific (product) LCAs.No statementthinkstepAAThis background LCI dataset can be used for any type of LCA studiesAAthinkstep2019-02-01T00:00:00.000ILCD format 1.1thinkstep2019-02-01T00:00:00.00000.00.001Data set finalised; entirely publishedAAtrueOtherGaBi (source code, database including extension modules and single data sets, documentation) remains property of thinkstep AG. thinkstep AG delivers GaBi licenses comprising data storage medium and manual as ordered by the customer. The license guarantees the right of use for one installation of GaBi. Further installations using the same license are not permitted. Additional licenses are only valid if the licensee holds at least one main license. Licenses are not transferable and must only be used within the licensee's organisation. Data sets may be copied for internal use. The number of copies is restricted to the number of licenses of the software system GaBi the licensee owns. The right of use is exclusively valid for the licensee. All rights reserved.Aluminium DC cast ingotOutput1.01.00Mixed primary / secondaryUnknown derivationvaluable