灰熔點的特征
發布(bu)時間:2022-10-11 點擊次數:424次灰分(fen)熔點是固體燃料(liao)中(zhong)的(de)灰分(fen),達到(dao)一定溫度(du)以后,發(fa)生變(bian)形,軟化和熔融時(shi)的(de)溫度(du),它與(yu)原料(liao)中(zhong)灰分(fen)組成有關(guan),灰分(fen)中(zhong)三氧(yang)化二鋁、二氧(yang)化硅(gui)含(han)量高,灰熔點高。
三(san)氧(yang)(yang)化(hua)二鐵、氧(yang)(yang)化(hua)鈣、氧(yang)(yang)化(hua)鎂(mei)、氧(yang)(yang)化(hua)鈉(na)和氧(yang)(yang)化(hua)鉀含量越高,灰熔(rong)(rong)點(dian)越低。灰分屬(shu)于無機混(hun)合物,其成(cheng)分影響它的熔(rong)(rong)點(dian)。接近熔(rong)(rong)點(dian)時開(kai)(kai)始(shi)變(bian)形(xing)、軟化(hua);達到(dao)熔(rong)(rong)點(dian)后(hou)開(kai)(kai)始(shi)熔(rong)(rong)化(hua),灰分呈(cheng)熔(rong)(rong)融(rong)狀態(tai),作液體狀態(tai)流動。
四個特征:
1變形溫度-灰錐尖(jian)端或棱開始變圓(yuan)或彎曲的(de)(de)時候的(de)(de)溫度;
2軟化溫(wen)度-灰錐(zhui)彎曲至錐(zhui)類處(chu)級托(tuo)板或灰錐(zhui)變成球星(xing)時的溫(wen)度;
3半球(qiu)溫度(du)-灰錐形(xing)變成半球(qiu)時,即告約(yue)等于底長的(de)(de)一半時的(de)(de)溫度(du);
4流(liu)動溫度-灰錐融化展開成高度在(zai)1.5mm以下薄層是的溫度。