爐門框架(jia)采用槽鋼制作，側板(ban)和底(di)板(ban)采用Q235鋼板(ban)焊(han)接，結構(gou)牢固(gu)可靠(kao)，不易變形和翹曲，整體強(qiang)度(du)好。

爐門升降為電動葫蘆驅動。箱式預熱爐廠家在爐門上有一斷路裝置，該裝置與輪軸連鎖，當爐門打開時即切斷加熱元件電源以保證操作人員安全。爐門上裝有調節式密封機構，有效使爐門密封。在爐頂上有一熱電偶孔，在使用時將熱電偶插入爐膛通過電爐控制柜來控制爐膛工作溫度。

控(kong)(kong)制(zhi)(zhi)系統：主控(kong)(kong)系統控(kong)(kong)制(zhi)(zhi)柜采(cai)用國(guo)際流(liu)行立式(shi)組合柜。控(kong)(kong)制(zhi)(zhi)柜外表(biao)(biao)(biao)噴涂電(dian)腦色或淺駝色。電(dian)控(kong)(kong)面板上裝有電(dian)流(liu)表(biao)(biao)(biao)、電(dian)壓表(biao)(biao)(biao)、溫度(du)控(kong)(kong)制(zhi)(zhi)儀及控(kong)(kong)制(zhi)(zhi)開(kai)關(guan)等。

溫度(du)(du)(du)控(kong)制主回路采(cai)用(yong)可控(kong)硅過零調(diao)功(gong)(gong)觸發，可控(kong)硅采(cai)用(yong)風(feng)冷(leng)形式，設有(you)過載(zai)、過熱及(ji)(ji)過流保(bao)護等功(gong)(gong)能。溫度(du)(du)(du)控(kong)制儀(yi)表選用(yong)先進(jin)的上海國龍智能高精度(du)(du)(du)數顯PID自整定型儀(yi)表，控(kong)制精度(du)(du)(du)±1℃。該溫度(du)(du)(du)控(kong)制配有(you)熱電(dian)偶修正功(gong)(gong)能、功(gong)(gong)率(lv)限(xian)制功(gong)(gong)能及(ji)(ji)超溫報警功(gong)(gong)能。當爐門打開時自動切斷加熱主電(dian)路，實現聯鎖保(bao)護。

爐溫(wen)記錄(lu)采用南(nan)通達華記錄(lu)儀，對升溫(wen)及保溫(wen)時間過程(cheng)實(shi)時打(da)印曲線、記錄(lu)溫(wen)度，同時對加熱(re)主回路實(shi)現監控作用，有效地監視整個生產工藝。