Classification of fine materials and recommendations for sintering

Methods are considered for sintering fine materials, and a requirement is demonstrated for classifying fine materials in order to select a sintering method, binding additive, and equipment provisions. A material fineness index is proposed, taking account of material natural features and its surface...

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Bibliographic Details
Published in:Chemical and petroleum engineering 2013-07, Vol.49 (3-4), p.228
Main Author: Il'ina, T.N
Format: Article
Language:English
Subjects:
Equipment and supplies
Fire extinction
Sintering
Online Access:Get full text
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Summary:Methods are considered for sintering fine materials, and a requirement is demonstrated for classifying fine materials in order to select a sintering method, binding additive, and equipment provisions. A material fineness index is proposed, taking account of material natural features and its surface energy, depending on the powder material preparation method. Powder materials are classified as low-fineness, medium-fineness, and very-fine. Recommendations are developed for organizing sintering in fineness systems of different stability. It is demonstrated that low-fineness heavy materials are pelletized with moisture-containing plastifiers, which it is expedient to add in the charge mixing stage for binding material free moisture in order to provide pellet plastic deformation during molding. For medium-fineness materials, it is possible to obtain pellets by extrusion and nodulizing with a moisture content of 18-23%. For very-fine materials, a preliminary charge compaction stage is necessary in order to remove a gas phase and form micropellets for subsequent growth and compaction.
ISSN:0009-2355
1573-8329