Furnace slag expanded

Both air-cooled blast furnace slag and expanded blast furnace slag can be used as a conventional aggregate in embankment or fill. They are generally considered by many specifying agencies to be... 

Artificial coarse aggregates These are mainly slag and expanded shale, and are frequently used to produce lightweight concrete. They are the by-product of other manufacturing processes, such as blast-furnace slag or expanded shale, or pumice for lightweight concrete. 

Inorganic expanded products are materials with closed pore structures and low densities, which exhibit very good insulation properties. They are manufactured using certain clays, shales, glasses and blast furnace slags. 

Consequently, the porosity and water absorption are much lower than those of ACBFS or expanded blast furnace slag... 

The production of indium and germanium products is important, and as was expected with the start-up of the KIVCET furnace and a new slag fuming furnace, the production has been expanded. The associated indium-germanium plant has now the capacity to produce 60-70 totmes of refined indium and 30-35 tonnes of contained germanium in germanium dioxide. Further expansion of germanium production is planned and will be implemented as necessary to match demand increases. 

The width of the furnace at the tuyeres or lower section is set by the penetration of the air blast and is in the range of 1.2 to 2.0 m, but more commonly 1.5 to 1.8 m. The tuyeres are set at a height of around 450 mm above the furnace tap hole. The upper shaft width can be expanded to 2 to 3 m and the overall shaft height is around 5 to 6 m. Some experimentation with tuyere angle of inclination and distance above the hearth may be needed for each furnace to achieve the desired crucible temperature and lead content in slag. 

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