Adiabatic　Oxidative　Heating　Behaviors　and Critical Ignition　Temperatures　of　Wood　Sawdusts

Abstract

TG－DTA　measurements　of15species　of　wood　sawdust　were￡rst　carried　out　in　air　at　normal pressuτe　to　see　to　what　degree　the　difference　of　wood　species　appears　in　the　results．　Then　several experimental　informations　were　collected　on　the　digerence　in　ignitability　of　some　parts　of　an　arbor　or on　the　variation　of　ignitability　of　wood　sawdusts　observed　when　various　substances　are　added　to　them， usinganadiabaticself－heatingPr・cessfec・rderindryairatn・rmalpressureunderadiabatic conditions．　Further，applying　a　procedure　which　the　author　has　proposed　to　estimate　the￠riticaI ignition　tempeτatures　of　any　stacks　of　self－heating　substances　to　these　wood　sawdusts，values　were obtained　in　reasonable　agreement　with　a　few　data　observed　on　wood　sawdust　stacks　of　similar　sizes． Following this procedure，the critical ignition temperatures of substanoes in the stacked states under non-adiabatic conditions can be estirnated more easjer than previous methods.