フライアッシュの基礎的性状におよぼす燃焼条件と石炭性状の影響 : 微粉炭燃焼試験設備を用いた実験的研究(熱工学,内燃機関,動力など)  [in Japanese] An Experimental Study on Effects of Combustion Conditions and Coal Properties on Fundamental Properties of Fly Ash by use of a Pulverized Coal Combustion Test Facility(Thermal Engineering)  [in Japanese]

It is very important to control the fly ash properties for effective utilization of fly ash. The influence of combustion conditions (particle size of pulverized coal, two-stage combustion ratio) and coal properties on the fly ash properties (particle size, Blaine, particle density and particle shape) are experimentally investigated by use of a pulverized coal combustion test facility. Particle size of pulverized coal strongly affects the fly ash properties. As the particle size of pulverized coal decreases, the particle size of fly ash also decreases. The particle density of fly ash increases and the shape of fly ash particle approaches spherical. The effects of the two-stage combustion ratio on the fly ash properties are weaker than particle size of pulverized coal. The coal properties also have little influence of the fly ash properties. The particle size distribution of fly ash is, however, affected by the fuel ratio.