Lead smelting (original) (raw)
Eine Bleihütte ist eine Industrieanlage zur Verhüttung (Erzeugung) von Blei. Die Bleihütten sind häufig in der Nähe von heutigen oder früheren Bleierzvorkommen angesiedelt. Die Abläufe und weiteren Hintergründe sind detailliert unter Blei dargestellt. In Deutschland dominieren heute Hütten, die Altblei, das „Sekundärblei“, wiederaufarbeiten, das überwiegend aus Autobatterien gewonnen wird. Eine Hütte, die Blei durch die Verhüttung von Bleierz gewinnt, heißt Primärbleihütte. Es gibt mehrere Standorte von ehemaligen und aktiven Bleihütten in Deutschland, darunter
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| dbo:abstract | Eine Bleihütte ist eine Industrieanlage zur Verhüttung (Erzeugung) von Blei. Die Bleihütten sind häufig in der Nähe von heutigen oder früheren Bleierzvorkommen angesiedelt. Die Abläufe und weiteren Hintergründe sind detailliert unter Blei dargestellt. In Deutschland dominieren heute Hütten, die Altblei, das „Sekundärblei“, wiederaufarbeiten, das überwiegend aus Autobatterien gewonnen wird. Eine Hütte, die Blei durch die Verhüttung von Bleierz gewinnt, heißt Primärbleihütte. Es gibt mehrere Standorte von ehemaligen und aktiven Bleihütten in Deutschland, darunter * Stolberg (Rhld.) mit den Primärbleihütten * Binsfeldhammer * Luzilia * Münsterbusch * Nordenham * Bleihütte der * Freiberg/Sachsen * Bleihütte Muldenhütten * Braubach * ehemalige Blei- und Silberhütte Braubach * im Harz * Bleihütte Clausthal * Bleihütte Oker. (de) Plants for the production of lead are generally referred to as lead smelters. Primary lead production begins with sintering. Concentrated lead ore is fed into a sintering machine with iron, silica, limestone fluxes, coke, soda ash, pyrite, zinc, caustics or pollution control particulates. Smelting uses suitable reducing substances that will combine with those oxidizing elements to free the metal. Reduction is the final, high-temperature step in smelting. It is here that the oxide becomes the elemental metal. A reducing environment (often provided by carbon monoxide in an air-starved furnace) pulls the final oxygen atoms from the raw metal. Lead is usually smelted in a blast furnace, using the lead sinter produced in the sintering process and coke to provide the heat source. As melting occurs, several layers form in the furnace. A combination of molten lead and slag sinks to the bottom of the furnace, with a layer of the lightest elements referred to as speiss, including arsenic and antimony floating to the top of the molten material. The crude bullion and lead slag layers flow out of the 'furnace front' and into the 'forehearth', where the two streams are separated. The lead slag stream, containing most of the 'fluxing' elements added to the sintering machine (predominantly silica, limestone, iron and zinc) can either be discarded or further processed to recover the contained zinc. The crude lead bullion, containing significant quantities of copper will then undergo 'copper drossing'. In this step elemental sulphur, usually in solid form is added to the molten crude lead bullion to react with the contained copper. A "matte" layer forms in this step, containing most of the copper originating from the crude lead bullion and some other impurities as metal sulfides. The speiss and the matte are usually sold to copper smelters where they are refined for copper processing. The lead from the blast furnace, called lead bullion, then undergoes the drossing process. The bullion is agitated in kettles then cooled to 700-800 degrees. This process results in molten lead and dross. Dross refers to the lead oxides, copper, antimony and other elements that float to the top of the lead. Dross is usually skimmed off and sent to a dross furnace to recover the non-lead components which are sold to other metal manufacturers. The Parkes process is used to separate silver or gold from lead. Finally, the molten lead is refined. Pyrometallurgical methods are usually used to remove the remaining non-lead components of the mixture, for example the Betterton-Kroll process and the Betts electrolytic process. The non-lead metals are usually sold to other metal processing plants. The refined lead may be made into alloys or directly cast. People who operate or work in such plants are also referred to as smelters. (en) |
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| dbp:date | February 2021 (en) |
| dbp:reason | Please define "primary lead production" (en) |
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| dct:subject | dbc:Smelting dbc:Lead |
| rdfs:comment | Eine Bleihütte ist eine Industrieanlage zur Verhüttung (Erzeugung) von Blei. Die Bleihütten sind häufig in der Nähe von heutigen oder früheren Bleierzvorkommen angesiedelt. Die Abläufe und weiteren Hintergründe sind detailliert unter Blei dargestellt. In Deutschland dominieren heute Hütten, die Altblei, das „Sekundärblei“, wiederaufarbeiten, das überwiegend aus Autobatterien gewonnen wird. Eine Hütte, die Blei durch die Verhüttung von Bleierz gewinnt, heißt Primärbleihütte. Es gibt mehrere Standorte von ehemaligen und aktiven Bleihütten in Deutschland, darunter (de) Plants for the production of lead are generally referred to as lead smelters. Primary lead production begins with sintering. Concentrated lead ore is fed into a sintering machine with iron, silica, limestone fluxes, coke, soda ash, pyrite, zinc, caustics or pollution control particulates. Smelting uses suitable reducing substances that will combine with those oxidizing elements to free the metal. Reduction is the final, high-temperature step in smelting. It is here that the oxide becomes the elemental metal. A reducing environment (often provided by carbon monoxide in an air-starved furnace) pulls the final oxygen atoms from the raw metal. (en) |
| rdfs:label | Bleihütte (de) Lead smelting (en) |
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