Obiettivo The aim of this project is to demonstrate the recovery of zinc, lead and other valuable metals from zinc-lead blast furnace slags using less energy than that needed to extract them from their conventional raw materials. This will be achieved by fitting a plasma torch to an extended section of the blast furnace forehearth. A carbonaceous reducing agent will be added to the electrically heated slag to reduce the zinc and lead oxides to produce metals which will evaporate to form vapours that will then be condensed to liquid metal.The project involves modifying a zinc-lead blast furnace by building a transferred arc plasma torch into the totally enclosed blast furnace fore hearth. An electric arc is struck between the plama torch electrode and the slag stream. The majority of the arc energy is liberated at the arc-slag terminus producing a temperature of around 1450 deg c. A carbonaceous reducant such as coke breeze is added to the slag to reduce the zinc oxide to metallic zinc vapour. This vapour is condensed from the exhaust gases in a zinc splash condenser.The slag from a zinc-lead blast furnace typically contains 7 - 10% zinc oxide. The process described should reduce this to approximately 2%. This could be further reduced by raising the temperature and bubbling an inert gas through the slag.Programme schedule extended until 28/02/91. Modifications in the programme were made concerning the plasma power source and associated cabling, as well as the form of the product which will be zinc metal for whichthere is a potential market available. Programma(i) ENG-ENDEMO C - Programme (EEC) of demonstration projects and industrial pilot projects (EEC) in the energy field, 1985-1989 Argomento(i) 3.4 - INDUSTRY Invito a presentare proposte Data not available Meccanismo di finanziamento DEM - Demonstration contracts Coordinatore Tetronics Research and Development Company Ltd Contributo UE Nessun dato Indirizzo 5b Lechlade Road SN7 9AJ Faringdon Regno Unito Mostra sulla mappa Costo totale Nessun dato
