保溫爐是(shi)一臺(tai)容量可(ke)達600公斤的臥式(shi)(shi)有鐵芯工頻(pin)感應電爐,為(wei)了便于控(kong)制爐內熔(rong)融金屬的溫(wen)度(du),可(ke)以(yi)采用(yong)(yong)(yong)調壓(ya)變壓(ya)器進行保溫(wen),但(dan)這種舊式(shi)(shi)設備(bei)操作(zuo)(zuo)麻煩,二來消(xiao)耗電力多,設備(bei)占用(yong)(yong)(yong)面積也(ye)大(da),采用(yong)(yong)(yong)可(ke)控(kong)硅交流調壓(ya)器,操作(zuo)(zuo)簡單便利(li),而且(qie)能節(jie)(jie)約用(yong)(yong)(yong)電,一臺(tai)保溫(wen)爐比用(yong)(yong)(yong)調壓(ya)變壓(ya)器每(mei)晝夜(ye)可(ke)以(yi)節(jie)(jie)省300度(du)電,又能為(wei)生產自動化(hua)創造了條件。
另外,由于升(sheng)(sheng)液(ye)(ye)管(guan)(guan)的工(gong)作(zuo)條(tiao)件惡劣,鑄(zhu)造科(ke)技工(gong)作(zuo)者正在(zai)尋求(qiu)更好的材料(liao)和合(he)理的措施(shi)以提高(gao)其壽命(ming)(ming)。現有(you)資料(liao)表明:采用(yong)含磷2.7%的鑄(zhu)鐵(tie)(tie)、含銅6.5%的鑄(zhu)鐵(tie)(tie)、高(gao)錳鑄(zhu)鐵(tie)(tie)或(huo)用(yong)具有(you)D型(xing)石(shi)墨的珠光體基體的孕育(yu)鑄(zhu)鐵(tie)(tie)鑄(zhu)造升(sheng)(sheng)液(ye)(ye)管(guan)(guan),其壽命(ming)(ming)可能延長(chang),可用(yong)120h以上;有(you)的采用(yong)普通鑄(zhu)鐵(tie)(tie)管(guan)(guan)進行表面滲硫處理,在(zai)鋁液(ye)(ye)中的壽命(ming)(ming)約可提高(gao)3倍;有(you)的在(zai)鑄(zhu)鐵(tie)(tie)管(guan)(guan)表面噴(pen)鍍一層三(san)氧(yang)(yang)(yang)化二鋁、氧(yang)(yang)(yang)化鋯或(huo)氧(yang)(yang)(yang)化鉻等材料(liao),升(sheng)(sheng)液(ye)(ye)管(guan)(guan)在(zai)鋁液(ye)(ye)中的壽命(ming)(ming)可達(da)700h;有(you)的試(shi)用(yong)氮化硅(gui)(gui)、碳化硅(gui)(gui)或(huo)氧(yang)(yang)(yang)化硼(peng)等耐熱陶瓷作(zuo)升(sheng)(sheng)液(ye)(ye)管(guan)(guan),雖(sui)然成本(ben)高(gao),但在(zai)鋁液(ye)(ye)中可用(yong)半年以上;還有(you)用(yong)石(shi)棉耐熱硅(gui)(gui)酸鹽作(zuo)升(sheng)(sheng)液(ye)(ye)管(guan)(guan),在(zai)三(san)班連續作(zuo)業的情況下(xia),可使用(yong)4~5個(ge)月,效果良好。