The water granulation conditions for producing high density, coarse granulated blast furnace slag were investigated in a laboratory-scale experiment. The influence of slag temperature, water temperature and nozzle shape on the density and grain size of granulated slag was clarified. The influence of these factors on the density and grain size of the slag was confirmed by using various nozzles in a slag water granulation system.Neural network computation was applied to estimation of the density and grain size of granulated blast furnace slag. The influence of water granulation conditions on the density and grain size predicted by neural network computation.Based on the results of this research, we proposed a new slag granulation system and manufactured a high density, coarse blast furnace slag fine aggregate.
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