保溫爐是一臺(tai)容量可達600公斤的臥(wo)式有鐵芯工頻感應電(dian)(dian)爐(lu),為了便(bian)(bian)于控制(zhi)爐(lu)內熔融金屬的溫(wen)度(du),可以(yi)采用(yong)(yong)(yong)調(diao)壓(ya)(ya)變壓(ya)(ya)器(qi)進行保(bao)溫(wen),但(dan)這(zhe)種舊(jiu)式設備操作(zuo)麻煩,二來消耗電(dian)(dian)力多,設備占用(yong)(yong)(yong)面積也大,采用(yong)(yong)(yong)可控硅交流調(diao)壓(ya)(ya)器(qi),操作(zuo)簡(jian)單便(bian)(bian)利(li),而且能節約(yue)用(yong)(yong)(yong)電(dian)(dian),一臺(tai)保(bao)溫(wen)爐(lu)比(bi)用(yong)(yong)(yong)調(diao)壓(ya)(ya)變壓(ya)(ya)器(qi)每晝夜可以(yi)節省300度(du)電(dian)(dian),又能為生產自動化創造(zao)了條(tiao)件。
另外,由于升(sheng)液(ye)管的(de)工作條件惡劣,鑄(zhu)造科技(ji)工作者(zhe)正在(zai)(zai)尋求更好的(de)材料和合(he)理的(de)措(cuo)施以提高其壽(shou)命(ming)。現有資料表(biao)(biao)明(ming):采用(yong)含(han)磷(lin)2.7%的(de)鑄(zhu)鐵(tie)(tie)(tie)、含(han)銅6.5%的(de)鑄(zhu)鐵(tie)(tie)(tie)、高錳鑄(zhu)鐵(tie)(tie)(tie)或(huo)用(yong)具有D型(xing)石墨的(de)珠(zhu)光(guang)體基體的(de)孕育(yu)鑄(zhu)鐵(tie)(tie)(tie)鑄(zhu)造升(sheng)液(ye)管,其壽(shou)命(ming)可(ke)(ke)(ke)能延長,可(ke)(ke)(ke)用(yong)120h以上;有的(de)采用(yong)普通(tong)鑄(zhu)鐵(tie)(tie)(tie)管進行表(biao)(biao)面滲硫處理,在(zai)(zai)鋁液(ye)中(zhong)(zhong)的(de)壽(shou)命(ming)約(yue)可(ke)(ke)(ke)提高3倍;有的(de)在(zai)(zai)鑄(zhu)鐵(tie)(tie)(tie)管表(biao)(biao)面噴鍍一層(ceng)三氧(yang)化(hua)(hua)二鋁、氧(yang)化(hua)(hua)鋯或(huo)氧(yang)化(hua)(hua)鉻(ge)等材料,升(sheng)液(ye)管在(zai)(zai)鋁液(ye)中(zhong)(zhong)的(de)壽(shou)命(ming)可(ke)(ke)(ke)達(da)700h;有的(de)試用(yong)氮化(hua)(hua)硅、碳化(hua)(hua)硅或(huo)氧(yang)化(hua)(hua)硼等耐熱陶(tao)瓷作升(sheng)液(ye)管,雖然(ran)成本高,但在(zai)(zai)鋁液(ye)中(zhong)(zhong)可(ke)(ke)(ke)用(yong)半年以上;還有用(yong)石棉耐熱硅酸鹽(yan)作升(sheng)液(ye)管,在(zai)(zai)三班連續作業的(de)情(qing)況下,可(ke)(ke)(ke)使用(yong)4~5個月,效果良(liang)好。