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Neues kontinuierliches Schmelz- und Raffinationsverfahren fuer Kupfer

Description: Das Projekt "Neues kontinuierliches Schmelz- und Raffinationsverfahren fuer Kupfer" wird vom Umweltbundesamt gefördert und von Norddeutsche Affinerie durchgeführt. Objective: The rising costs of energy and labour together with stringent environmental protection requirements have led to the development of new methods for non-ferrous metal extraction, in which there is a trend towards continuous production plants with a high specific output. Contimelt is a new two-stage process for melting and refining copper. Compared to the traditional batch wise operated reverberatory refining furnace, Contimelt represents a continuous operation with a high melting/refining rate, saving energy and man-hours and allowing close environmental control. General Information: Contimelt consists of two processing stages: the anode shaft furnace, in which the Cu-feed material (blister copper, anode scrap, copper scrap) is melted and refined, and the poling furnace, in which copper is poled (deoxidized) in a continuous flow. The molter copper is cast to anodes to be electrolytic ally refined in the tank house. ANODE SHAFT FURNACE (ASF). The anode shaft furnace consists of a small hearth furnace with a mounted shaft. The hot off-gases flow through the feed material in the shaft and heat it up in a counter current flow. As a result energy is saved in comparison with the conventional method. The firing system is divided into 3 burner sections (one of which is a pure oxygen-burner). The sections function independently of each other. By having one or more burners out of operation each area in the furnace can, as required, be heated to a different level. The melting rate of the anode shaft furnace lies in the region of 50-100 t/h according to the ease of melting the charge and the oxygen enrichment.. The slag tapping opening is in the superheating area of the hearth furnace through which the slag is skimmed. The copper is tapped continuously and flows via a launder into the drum-type poling furnace. POLING AND CASTING FURNACE (PCF). The copper with a high oxygen content melted in the anode shaft furnace is deoxidized from 6000 g/t or even 9000 g/t to less than 1000 g/t of oxygen in the poling furnace. The poling furnace has a holding capacity of up to 80 tonnes of copper. The off-gas with a high proportion of unburnt gases is then after burnt in a La-Mont boiler. Two tuyeres using natural gas operate under the bath to pole the copper. The tuyeres and the tap hole are situated so that poling and casting is continuous. The volume of poling gas that can be employed per tuyere is about 250 Nm3/h natural gas. The poled copper flows through a launder to two anode casting wheels. OFF-GAS SYSTEM. For off-gas handling from the ASF and the PCF three ventilators with a total 140,000 m3/h suction rate are available, of which one is installed behind the waste heat boiler and the other two behind the filter. A waste heat boiler and air preheater system is used to cool the combined off-gases of the ASF and PCF. The off-gases are finally ducted through a fresh air cooler, in which the off-gas temperature is further reduced by 80 to 100 deg C., and ...

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Origin: /Bund/UBA/UFORDAT

Tags: Hirsch ? Kupferhütte ? Kupferschrott ? Erdgas ? Luftkühlung ? Metallschmelze ? Nachverbrennung ? Kupfer ? Nichteisenmetall ? Sauerstoff ? Raffination ? Abgasnachbehandlung ? Luftbewegung ? Lufttemperatur ? Warmwasserbereiter ? Raffinerie ? Schachtofen ? Schlacke ? Umweltschutzausgaben ? Verfahrensoptimierung ? Filter ? Futtermittel ? Gasförmiger Stoff ? Kühleinrichtung ? Tankbehälter ? Blister-Verpackung ? Gebühr ? Abhitzekessel ? Kühlung ? Energie ? Energieeinsparung ? Energiekosten ? Abgasreinigung ? Neuanlage ? Produktionskosten ? Kostensenkung ? Kühlsystem ? Sauerstoffgehalt ? Schmelzofen ? Strömungsfeld ? Umwelttechnik ? Wärmekapazität ? Reinigungsverfahren ? Höhle ? Umweltschutz ? Anreicherung ? Ofen ? Arbeit ? Kessel ? Metallurgie ? Kontinuierliches Verfahren ? Produktivitätssteigerung ? Schmelztechnik ? Abgastemperatur ? Ventilator ? Metallumschmelzwerk ?

Region: Hamburg

Bounding box: 9.99302° .. 9.99302° x 53.55073° .. 53.55073°

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

Time ranges: 1982-11-01 - 1984-03-31

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