保溫爐是一臺容量(liang)可達600公斤的臥式有鐵芯工頻(pin)感應(ying)電爐(lu),為(wei)了便(bian)于控(kong)制爐(lu)內熔融金屬的溫(wen)(wen)度(du),可以采用(yong)(yong)調(diao)壓(ya)變(bian)壓(ya)器(qi)進行保(bao)溫(wen)(wen),但這種舊(jiu)式設(she)(she)備操作麻煩,二來(lai)消耗電力多,設(she)(she)備占(zhan)用(yong)(yong)面積也大,采用(yong)(yong)可控(kong)硅交流(liu)調(diao)壓(ya)器(qi),操作簡單便(bian)利,而且能(neng)節(jie)約(yue)用(yong)(yong)電,一臺保(bao)溫(wen)(wen)爐(lu)比用(yong)(yong)調(diao)壓(ya)變(bian)壓(ya)器(qi)每晝夜可以節(jie)省300度(du)電,又能(neng)為(wei)生產自動化創造(zao)了條件。
另外,由(you)于升(sheng)液(ye)管(guan)(guan)(guan)的(de)(de)(de)工(gong)作(zuo)(zuo)條件惡(e)劣,鑄(zhu)(zhu)造科(ke)技工(gong)作(zuo)(zuo)者正在尋(xun)求更好的(de)(de)(de)材料(liao)和合理的(de)(de)(de)措施(shi)以(yi)提高(gao)(gao)其壽(shou)命(ming)。現有(you)資(zi)料(liao)表明:采用(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(gao)(gao)錳鑄(zhu)(zhu)鐵(tie)或(huo)用(yong)(yong)(yong)具有(you)D型石(shi)墨(mo)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(ye)管(guan)(guan)(guan),其壽(shou)命(ming)可能(neng)延長,可用(yong)(yong)(yong)120h以(yi)上(shang);有(you)的(de)(de)(de)采用(yong)(yong)(yong)普通鑄(zhu)(zhu)鐵(tie)管(guan)(guan)(guan)進(jin)行(xing)表面滲硫處理,在鋁液(ye)中的(de)(de)(de)壽(shou)命(ming)約可提高(gao)(gao)3倍;有(you)的(de)(de)(de)在鑄(zhu)(zhu)鐵(tie)管(guan)(guan)(guan)表面噴鍍(du)一(yi)層三(san)氧(yang)化二鋁、氧(yang)化鋯或(huo)氧(yang)化鉻等(deng)材料(liao),升(sheng)液(ye)管(guan)(guan)(guan)在鋁液(ye)中的(de)(de)(de)壽(shou)命(ming)可達700h;有(you)的(de)(de)(de)試用(yong)(yong)(yong)氮化硅(gui)、碳化硅(gui)或(huo)氧(yang)化硼等(deng)耐熱陶瓷作(zuo)(zuo)升(sheng)液(ye)管(guan)(guan)(guan),雖然成本高(gao)(gao),但在鋁液(ye)中可用(yong)(yong)(yong)半(ban)年以(yi)上(shang);還(huan)有(you)用(yong)(yong)(yong)石(shi)棉耐熱硅(gui)酸鹽(yan)作(zuo)(zuo)升(sheng)液(ye)管(guan)(guan)(guan),在三(san)班連(lian)續作(zuo)(zuo)業(ye)的(de)(de)(de)情況下,可使(shi)用(yong)(yong)(yong)4~5個月,效果良好。