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,由于升(sheng)液管(guan)(guan)(guan)的(de)(de)(de)工作(zuo)條件惡劣,鑄(zhu)(zhu)造科技工作(zuo)者正在(zai)尋求更好的(de)(de)(de)材料(liao)和合(he)理的(de)(de)(de)措施以提高其壽(shou)命(ming)。現有資料(liao)表(biao)明(ming):采用(yong)(yong)(yong)(yong)含磷2.7%的(de)(de)(de)鑄(zhu)(zhu)鐵(tie)、含銅6.5%的(de)(de)(de)鑄(zhu)(zhu)鐵(tie)、高錳鑄(zhu)(zhu)鐵(tie)或用(yong)(yong)(yong)(yong)具有D型(xing)石(shi)(shi)墨(mo)的(de)(de)(de)珠光(guang)體(ti)基體(ti)的(de)(de)(de)孕育鑄(zhu)(zhu)鐵(tie)鑄(zhu)(zhu)造升(sheng)液管(guan)(guan)(guan),其壽(shou)命(ming)可能延長,可用(yong)(yong)(yong)(yong)120h以上;有的(de)(de)(de)采用(yong)(yong)(yong)(yong)普通鑄(zhu)(zhu)鐵(tie)管(guan)(guan)(guan)進(jin)行表(biao)面(mian)滲(shen)硫處理,在(zai)鋁液中(zhong)的(de)(de)(de)壽(shou)命(ming)約可提高3倍;有的(de)(de)(de)在(zai)鑄(zhu)(zhu)鐵(tie)管(guan)(guan)(guan)表(biao)面(mian)噴(pen)鍍(du)一層三氧(yang)化二鋁、氧(yang)化鋯(gao)或氧(yang)化鉻(ge)等材料(liao),升(sheng)液管(guan)(guan)(guan)在(zai)鋁液中(zhong)的(de)(de)(de)壽(shou)命(ming)可達700h;有的(de)(de)(de)試用(yong)(yong)(yong)(yong)氮(dan)化硅(gui)(gui)、碳化硅(gui)(gui)或氧(yang)化硼等耐(nai)熱陶瓷(ci)作(zuo)升(sheng)液管(guan)(guan)(guan),雖(sui)然成(cheng)本(ben)高,但在(zai)鋁液中(zhong)可用(yong)(yong)(yong)(yong)半(ban)年以上;還有用(yong)(yong)(yong)(yong)石(shi)(shi)棉耐(nai)熱硅(gui)(gui)酸(suan)鹽(yan)作(zuo)升(sheng)液管(guan)(guan)(guan),在(zai)三班連續作(zuo)業的(de)(de)(de)情(qing)況下,可使(shi)用(yong)(yong)(yong)(yong)4~5個(ge)月,效果良好。