灰熔點的特征
發布(bu)時間:2022-10-11 點擊次數:432次灰(hui)分熔點(dian)是(shi)固體燃料(liao)中(zhong)(zhong)的(de)灰(hui)分,達到一定溫度以后,發生變形(xing),軟化和熔融(rong)時的(de)溫度,它與原(yuan)料(liao)中(zhong)(zhong)灰(hui)分組(zu)成有關(guan),灰(hui)分中(zhong)(zhong)三氧化二鋁、二氧化硅含量(liang)高(gao),灰(hui)熔點(dian)高(gao)。
三氧(yang)化(hua)(hua)二鐵、氧(yang)化(hua)(hua)鈣、氧(yang)化(hua)(hua)鎂、氧(yang)化(hua)(hua)鈉和(he)氧(yang)化(hua)(hua)鉀含量越高(gao),灰熔(rong)(rong)點越低(di)。灰分(fen)屬于(yu)無機混合物,其成分(fen)影響(xiang)它的熔(rong)(rong)點。接近熔(rong)(rong)點時開(kai)始(shi)(shi)變形、軟化(hua)(hua);達到熔(rong)(rong)點后開(kai)始(shi)(shi)熔(rong)(rong)化(hua)(hua),灰分(fen)呈(cheng)熔(rong)(rong)融狀(zhuang)態(tai),作(zuo)液體狀(zhuang)態(tai)流動。
四個特征:
1變形溫度(du)-灰錐尖端或棱(leng)開始(shi)變圓或彎曲(qu)的時候的溫度(du);
2軟化溫度-灰(hui)錐(zhui)彎曲至錐(zhui)類處(chu)級(ji)托(tuo)板或(huo)灰(hui)錐(zhui)變成(cheng)球(qiu)星時的(de)溫度;
3半球溫度-灰錐形變(bian)成半球時,即告(gao)約等于底長的一半時的溫度;
4流動溫(wen)度(du)(du)-灰錐融(rong)化展開成(cheng)高度(du)(du)在1.5mm以下(xia)薄層是的溫(wen)度(du)(du)。