| 摘要 |
<p>PURPOSE:To efficiently obtain ultrafine powder useful as a concrete admixture by combining ultrafine pulverization treatment equipment with ultrahigh-temperature vaporizing treatment equipment and product preparation equipment so as to perform specific action. CONSTITUTION:Ultrafine pulverization treatment equipment (A) is constructed of the first coal combustion ash receiving hopper 9, an ultrafine pulverizer 10 and a classifier 11. Ultrahigh-temperature vaporization treatment equipment (B) is composed of the second ash receiving hopper 13, an ultrahigh-temperature furnace 14, a powdered coal hopper 15 for improving combustion, a primary air fan 16 for conveying the powdered coal for improving combustion, an oxygen production apparatus 17 for oxygen-enriched combustion, a silica fume cooler 18, a collector 19 and a heat recovering device 20. In product preparation equipment (C), the feed rate of ultrafine particles in the ultrafine powder hoppers 12 and 22 is controlled with feeder 23 and 24 for optimum mixing and the particles are fed into a mixer 25. The ultrafine particles produced in the above-mentioned equipment for producing ultrafine powder are rich in silica. On the other hand, molten slag 21 is rich in alumina. Thereby, the aforementioned equipment for producing the ultrafine powder has also function to separate SiO2 and Al2O3.</p> |
