Analogue experimental investigation on ligament granulation of molten slag in various rotary disk configurations for waste energy recovery

Peng, Hao; Shan, Xuekun; Ling, Xiang; Wang, Dongxiang; Li, Juan

doi:10.1016/j.rinp.2018.09.037

Cited by 10 publications

(1 citation statement)

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“…Another possible method for investigation of fiberization and primary layer formation is to employ a low-temperature melt that can be safely handled in the laboratory environment. Several authors investigated the fiberization process as an undesired phenomenon in the dry centrifugal granulation process using a rosin-paraffin melt [12] to [14], but with little regard to fiber formation dynamics. Speaking of the fibrous primary layer formation process, several studies have been conducted.…”

Section: Introductionmentioning

confidence: 99%

Analogue Experimental Study of Fiber Formation on Two-Wheel Spinner

Bizjan

Širok

Blagojevič

2020

SV-JME

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In this paper, the process of mineral fiber formation was investigated experimentally on a two-wheel spinner by means of high-speed imaging. Analogue isomalt melt was fiberized at different rotational speeds of spinner wheels, melt flow rates and impingement positions so that the fiberization process was dynamically similar to an industrial mineral wool production process. Images of fiber formation and transport reveal highly complex dynamics of these processes, as fibers mostly occur in form of 3D mutually intertwined structures such as clusters, strands and veils periodically shedding from the melt film. Despite the complexity of flow structures, there is a clear trend of increasing mean fiber length and expansion angle of the coaxial fiber-laden flow as the Weber number and the ratio of melt film velocity to blowing air velocity are increased. The fiberization efficiency (ratio of fiber mass deposited on the collecting mesh to the mass of melt poured) is affected by the impingement position and flow rate of melt as well as the Weber number of melt film. The optimum efficiency was attained at 30° (1 o’clock) impingement position and the ratio of melt film to blowing air flow velocity close to unity.

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Section: Introductionmentioning

confidence: 99%