Characteristics of Glass Beads from Molten Slag Produced by Rotary Cup Atomizer
Characteristics of Glass Beads from Molten Slag Produced by Rotary Cup Atomizer
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DOI：
10.2320/matertrans.45.3286
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发表时间：
2004-12
影响因子：
1.2
通讯作者：
H. Purwanto;T. Mizuochi;H. Tobo;T. Masato;T. Akiyama
中科院分区：
文献类型：
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作者：
H. Purwanto;T. Mizuochi;H. Tobo;T. Masato;T. Akiyama
炼钢是一个高耗能的工业，高温熔渣排放，没有任何热量回收。本文介绍了旋转杯雾化器（RCA）在无水冲击条件下制备干燥玻璃渣的热态实验。本文主要研究了粒化渣的性能。首先将熔融炉渣以各种旋转速度倾倒在旋转杯的中心上。然后使用摄像机观察炉渣粒化，最后收集颗粒进行物理和化学分析。XRD和DSC分析结果表明，RCA法得到的渣滴均为玻璃态。粒化炉渣的颗粒尺寸由杯的直径和旋转速度两者强烈控制。粒度与两个参数的关系为Dp = 16.86/rω。在较高转速下产生的较小颗粒似乎更透明或玻璃状，并且与水粒化炉渣相比具有两倍高的抗压强度。所得数据不仅为玻璃渣的制备提供了有价值的信息，而且为气体与熔渣之间的有效能量交换提供了有价值的信息。
Steelmaking is well known to be one of the highest energy-consuming industries, where high temperature molten slag is discharged without any heat recovery. This paper describes the hot experiments where a Rotary Cup Atomizer (RCA) is used to produce dry glassy slag without water impingement. In this, the properties for granulated slag were chiefly investigated. Molten slag was first poured onto the center of the rotating cup at various rotating speeds. Slag granulation was then observed using a video camera, and finally, the particles were collected for physical and chemical analyses. The results of XRD and DSC analyses demonstrate that all slag drops obtained by the RCA method are undoubtedly glassy. The particle size of the granulated slag is strongly controlled by both the diameter of the cup and the speed of rotation. The relationship between the particle size and the two parameters is expressed as Dp = 16.86/rω. Smaller particles that produced at a higher rotating speed seem to be more transparent or glassy and have compression strength twice higher in comparison with water granulated slag. The data obtained will provide valuable information not only for producing glassy slag, but also for exchanging energy between gas and molten slag efficiently.