Abstract
In establishing coal firing power plants, the processing of a large amount of coal ash generated from the plants is becoming a serious problem and the development of the technology to effectively utilize a large amount of coal ash as a resource is expected.
In accordance with such social demands, Kyushu Electric Power Co. Inc., Kyudensangyo Co. Inc., and Kobe steel, Ltd. jointly succeed in development of the technology of manufacturing the lightweight aggregates which was expected to enable to effectively utilize a large amount of coal fly ash. The product has been brought to market under the brand name of FA-LIGHT.
FA-LIGHT is produced by the sintering process utilizing the unburned carbon left in coal fly ash, after the green pellets agglomerated by the mixed and premoistened fly ash are ignited by the pulverized coal firing burner.
This technology can make a great contribution to the recycling of industrial waste, compared with the conventional process to manufacture the lightweight aggregates from shale with the rotary kiln system, because the process effectively utilizes a large amount of coal fly ash of industrial waste and consume less fuel by adopting of the sintering method utilizing the unburned carbon left in coal fly ash.
