臥式預熱保溫爐是一臺容量可達600公斤的臥式有鐵芯工頻感應電爐,為了便于控制爐內熔融金屬的溫度,可以采用調壓變壓器進行保溫,但這種舊式設備操作麻煩,二來消耗電力多,設備占用面積也大,采用可控硅交流調壓器,操作簡單便利,而且能節約用電,一臺保溫爐比用調壓變壓器每晝夜可以節省300度電,又能為生產自動化創造了條件。
另外,由(you)于升(sheng)液管(guan)(guan)(guan)(guan)的(de)(de)(de)工(gong)作(zuo)條件惡劣,鑄(zhu)(zhu)造科(ke)技工(gong)作(zuo)者正在(zai)(zai)尋求更好的(de)(de)(de)材料(liao)和合理的(de)(de)(de)措施(shi)以提高其壽命(ming)(ming)。現有(you)(you)(you)資料(liao)表明:采(cai)用(yong)(yong)(yong)含(han)磷2.7%的(de)(de)(de)鑄(zhu)(zhu)鐵(tie)、含(han)銅6.5%的(de)(de)(de)鑄(zhu)(zhu)鐵(tie)、高錳(meng)鑄(zhu)(zhu)鐵(tie)或用(yong)(yong)(yong)具(ju)有(you)(you)(you)D型石墨的(de)(de)(de)珠(zhu)光體基體的(de)(de)(de)孕育鑄(zhu)(zhu)鐵(tie)鑄(zhu)(zhu)造升(sheng)液管(guan)(guan)(guan)(guan),其壽命(ming)(ming)可(ke)(ke)(ke)能延長,可(ke)(ke)(ke)用(yong)(yong)(yong)120h以上;有(you)(you)(you)的(de)(de)(de)采(cai)用(yong)(yong)(yong)普通鑄(zhu)(zhu)鐵(tie)管(guan)(guan)(guan)(guan)進行表面(mian)滲硫(liu)處理,在(zai)(zai)鋁(lv)液中的(de)(de)(de)壽命(ming)(ming)約可(ke)(ke)(ke)提高3倍;有(you)(you)(you)的(de)(de)(de)在(zai)(zai)鑄(zhu)(zhu)鐵(tie)管(guan)(guan)(guan)(guan)表面(mian)噴(pen)鍍一層三氧(yang)(yang)化(hua)(hua)(hua)(hua)二鋁(lv)、氧(yang)(yang)化(hua)(hua)(hua)(hua)鋯或氧(yang)(yang)化(hua)(hua)(hua)(hua)鉻等材料(liao),升(sheng)液管(guan)(guan)(guan)(guan)在(zai)(zai)鋁(lv)液中的(de)(de)(de)壽命(ming)(ming)可(ke)(ke)(ke)達(da)700h;有(you)(you)(you)的(de)(de)(de)試用(yong)(yong)(yong)氮化(hua)(hua)(hua)(hua)硅(gui)、碳化(hua)(hua)(hua)(hua)硅(gui)或氧(yang)(yang)化(hua)(hua)(hua)(hua)硼等耐熱陶瓷(ci)作(zuo)升(sheng)液管(guan)(guan)(guan)(guan),雖然成本高,但在(zai)(zai)鋁(lv)液中可(ke)(ke)(ke)用(yong)(yong)(yong)半年以上;還(huan)有(you)(you)(you)用(yong)(yong)(yong)石棉(mian)耐熱硅(gui)酸鹽作(zuo)升(sheng)液管(guan)(guan)(guan)(guan),在(zai)(zai)三班連續作(zuo)業(ye)的(de)(de)(de)情況下,可(ke)(ke)(ke)使用(yong)(yong)(yong)4~5個月,效果良好。