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In order to encourage the recycling of slag, the Japanese steel industry established the Slag utilisation Committee in Japan Iron and Steel Federation. A total of 37 Mio t slag is generated annually by the Japanese steelworks, 62 % as blast furnace slag. At present, all the blast furnace slag is recycled. Remarkable progress has been made in recycling steel making slag, where the recycling rate has reached 92 % for converter slag and 83 % for EAF slag. Current major markets for slags are as materials for cement production, road construction and earth works. The future of slag utilisation is influenced by the closing of material cycles not only in the steel industry. Especially the reuse of waste materials from the demolition of buildings, roads and other construction work are serious risk for the further use of slags in the construction industry. Collected coal fry ash can be used in cement material as well as steel plant slag. Currently lots of coal ash is being produced in power plant. Recycled concrete can be used to make coarse road bed material, as well as air cooled steel plant slag. It is necessary to develop a new market or new utilisation method. Past conventional utilisation of steel plant slag in port and harbour construction was mainly for sub-grade material. Utilisation of slag, taking advantage of the light weight of the granulated blast furnace slag and large unite weight of the converter slag, leads to the construction of a stable and economical structure. Besides, utilisation of slag is not only an effective recycling of industrial waste but also a prevention of environmental disruption by using slag instead of rock and sand.
In order to encourage the recycling of slag, the Japanese steel industry established the Slag utilisation Committee in Japan Iron and Steel Federation. A total of 37 Mio t slag is generated annually by the Japanese steelworks, 62 % as blast furnace slag. At present, all the blast furnace slag is recycled. Remarkable progress has been made in recycling steel making slag, where the recycling rate has reached 92 % for converter slag and 83 % for EAF slag. Current major markets for slags are as materials for cement production, road construction and earth works. The future of slag utilisation is influenced by the closing of material cycles not only in the steel industry. Especially the reuse of waste materials from the demolition of buildings, roads and other construction work are serious risk for the further use of slags in the construction industry. Collected coal fry ash can be used in cement material as well as steel plant slag. Currently lots of coal ash is being produced in power plant. Recycled concrete can be used to make coarse road bed material, as well as air cooled steel plant slag. It is necessary to develop a new market or new utilisation method. Past conventional utilisation of steel plant slag in port and harbour construction was mainly for sub-grade material. Utilisation of slag, taking advantage of the light weight of the granulated blast furnace slag and large unite weight of the converter slag, leads to the construction of a stable and economical structure. Besides, utilisation of slag is not only an effective recycling of industrial waste but also a prevention of environmental disruption by using slag instead of rock and sand.
Properties and usage of steel plant slag
Eigenschaften und Verwendung von Hochofen- und Stahlwerksschlacken
Ozeki, S. (author)
1997
5 Seiten, 1 Bild, 5 Tabellen, 5 Quellen
Conference paper
English
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