ANALYSIS OF FUSING AND SPHERING PHENOMENA OF SOLID PARTICLES IN FLAMESPRAY UNIT

Authors
Citation
T. Go et al., ANALYSIS OF FUSING AND SPHERING PHENOMENA OF SOLID PARTICLES IN FLAMESPRAY UNIT, Kagaku kogaku ronbunshu, 21(4), 1995, pp. 648-656
Citations number
1
Categorie Soggetti
Engineering, Chemical
Journal title
ISSN journal
0386216X
Volume
21
Issue
4
Year of publication
1995
Pages
648 - 656
Database
ISI
SICI code
0386-216X(1995)21:4<648:AOFASP>2.0.ZU;2-N
Abstract
The production process for spherical particles by flame spraying is a method for exposing solid particles to the combustion flame and to fus e them to make spheres. It is used for producing ceramic or metal sphe rical particles. In the development of this process it is very importa nt to analyze the fusing and sphering phenomena of solid particles qua ntitatively. In this study a model of momentum and heat transfer in th e process was formulated to analyze these phenomena. The velocity dist ribution of the particles, the temperature distributions in the partic le, and the melting state were calculated by this model. Spherical par ticles of alumina and silica were produced in experiments using the fl ame spray method. These experimental results were approximately in acc ordance with the calculated ones. From these results, the model was fo und to be very useful for process analysis of the production of spheri cal particles from solid powder by the flame spray process.