Pedersen process (original) (raw)
The Pederson process is a process of refining aluminum that first separates iron by reducing it to metal, and reacting alumina with lime to produce calcium aluminate, which is then leached with sodium hydroxide. It is more environmentally friendly than the more well-known Bayer process. This is because instead of producing alumina slag, also known as red mud, it produces pig iron as a byproduct. Red mud is considered both an economic and environmental challenge in the aluminum industry because it is considered a waste, with little benefit. It destroys the environment with its high pH, and is costly to maintain, even when in a landfill. Iron, however, is used in the manufacture of steel, and has structural uses in civil engineering and chemical uses as a catalyst.
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| dbo:abstract | The Pederson process is a process of refining aluminum that first separates iron by reducing it to metal, and reacting alumina with lime to produce calcium aluminate, which is then leached with sodium hydroxide. It is more environmentally friendly than the more well-known Bayer process. This is because instead of producing alumina slag, also known as red mud, it produces pig iron as a byproduct. Red mud is considered both an economic and environmental challenge in the aluminum industry because it is considered a waste, with little benefit. It destroys the environment with its high pH, and is costly to maintain, even when in a landfill. Iron, however, is used in the manufacture of steel, and has structural uses in civil engineering and chemical uses as a catalyst. (en) |
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| dbo:wikiPageWikiLink | dbr:Catalyst dbr:Bayer_process dbr:Electrical_energy dbr:Environmentally_friendly dbr:Byproduct dbr:Lime_(material) dbr:Pig_iron dbr:Manufacture dbr:Environmental dbr:Copper dbr:Bauxite dbr:Hall–Héroult_process dbr:Thermal_energy dbr:Tin dbr:Iron_oxide dbr:Economic dbr:Landfill dbr:Aluminum dbc:Aluminium_industry dbr:Bronze dbr:Norway dbr:PH dbr:Steel dbr:Chemical dbr:Process dbr:Harald_Pedersen dbr:Iron dbc:Chemical_processes dbc:Metallurgical_processes dbr:Coal dbr:Red_mud dbr:Sodium_hydroxide dbr:Civil_engineering dbr:Metal dbr:Natural_environment dbr:Maintain dbr:Smelting dbr:Refining dbr:Alumina dbr:Structural |
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| dct:subject | dbc:Aluminium_industry dbc:Chemical_processes dbc:Metallurgical_processes |
| rdfs:comment | The Pederson process is a process of refining aluminum that first separates iron by reducing it to metal, and reacting alumina with lime to produce calcium aluminate, which is then leached with sodium hydroxide. It is more environmentally friendly than the more well-known Bayer process. This is because instead of producing alumina slag, also known as red mud, it produces pig iron as a byproduct. Red mud is considered both an economic and environmental challenge in the aluminum industry because it is considered a waste, with little benefit. It destroys the environment with its high pH, and is costly to maintain, even when in a landfill. Iron, however, is used in the manufacture of steel, and has structural uses in civil engineering and chemical uses as a catalyst. (en) |
| rdfs:label | Pedersen process (en) |
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