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Mechanism of the Formation of Slag Particles by the Rotary Cylinder Atomization

机译：旋转圆筒雾化形成炉渣颗粒的机理

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Slag is a potential resource of energy and materials because it contains a lot of elements and is at the high temperature of around 1500°C when exhausted.In the previous study, we developed a rotary cylinder atomizing (RCLA) method that can efficiently use the rotation energy for atomizing the molten slag. The minimum diameter of the slag particle was from 10 to 50% of the nozzle diameter. The obtained slag particles were amorphous spheres with high aspect ratios. The higher rotation speed and smaller nozzle diameter could make smaller particles. In the present study, the mechanism of slag particle formation from spouting slag string through the nozzle was investigated using the high-speed camera and the theoretical approach was performed.The slag was string-shaped when spouted from the nozzle. The relationship between the particle diameter (d ) and nozzle diameter (2a ) was derived as follows: [Equation] Where ρ is density, L is the distance from the center of rotation to the tip of the slag string, Z is rotation speed and γ is surface tension of slag.The flow rate of slag was evaluated using Hagen–Poiseuille's equation and the relationship between the particle diameter and the slag string diameter was obtained using Weber's equation. By comparison between the experimental and calculated results, we concluded that a string diameter of 0.2 mm for a 1.3mm nozzle diameter was adequate in this experiment.
机译：炉渣是一种潜在的能源和材料资源，因为它包含许多元素，并且在排空时处于1500°C左右的高温下。雾化熔融炉渣的旋转能量。炉渣颗粒的最小直径为喷嘴直径的10％至5​​0％。所获得的炉渣颗粒是具有高纵横比的无定形球体。较高的转速和较小的喷嘴直径可以使颗粒更小。在本研究中，使用高速摄影机研究了通过喷嘴从喷嘴喷出炉渣串形成炉渣颗粒的机理，并进行了理论方法研究。从喷嘴喷出的炉渣呈串状。粒径（id）与喷嘴直径（i2a）之间的关系如下：[等式]其中ρ为密度， L为从旋转中心到尖端的距离用Hagen–Poiseuille方程评估炉渣的流速，并使用Weber方程获得粒径与炉渣柱直径之间的关系。通过实验结果和计算结果之间的比较，我们得出结论：在此实验中，对于1.3mm的喷嘴直径，使用0.2 mm的细绳直径就足够了。

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