Studies on Properties and Combustibility of Locomotive Briquette

• Published in: Journal of the Fuel Society of Japan Vol. 41; no. 1; pp. 32 - 50
• Main Author: Kita, Nobuyouki
• Format: Journal Article
• Language: Japanese
• Published: THE JAPAN INSTITUTE OF ENERGY 20.01.1962
• ISSN: 0369-3775; 2185-226X
• DOI: 10.3775/jie.41.32

For the purpose of decreasing the burning loss largely due to high burning rate in locomotive boilers, burning collapsibility of pitch briquette was investigated.Colla-psing phenomena, which change in general with coal grades, or under various manufacturing and burning conditions, were indicated to be classified into four types;that is, coagulation, flower-leaf, granule, and swelling.The collapsing phenomena of these types are coused by different combinations of several factors, that is, crack due to rapid heating, action of swelling control, melting due to caking property and separating due to shrinking property at the adhe-sive surface between coal and pitch, and other factors.Further, field tests were carried out to find the relation between these types and burning loss, and the results are: larger ash loss with the coagulation type, larger cinder loass with the granule type, firing difficulty with the swelling type;but these kinds of loss are proved smaller with the flower-leaf type which is considered the most suitable locomotive briquettes.The conclusions are as follows;1) The collapsibility of flower-leaf type, as well as calorific value and tambler test value, is regarded as necessary for locomotiue briquette.2) Even if the material itself belong to the granule type or the coagulation type, the flower-leaf type briguette will be possibly prepared by-proper combination according to the formation theory of flower-leaf type.