保溫爐是一臺容量(liang)可(ke)(ke)達600公(gong)斤的臥式(shi)有鐵芯工(gong)頻感應電(dian)爐,為了便(bian)于控(kong)制爐內熔融金(jin)屬的溫(wen)度(du),可(ke)(ke)以(yi)采(cai)用(yong)(yong)(yong)調(diao)(diao)壓變壓器(qi)進(jin)行保溫(wen),但這(zhe)種舊(jiu)式(shi)設備操(cao)作(zuo)麻(ma)煩,二(er)來消耗電(dian)力多,設備占用(yong)(yong)(yong)面積也大,采(cai)用(yong)(yong)(yong)可(ke)(ke)控(kong)硅交流調(diao)(diao)壓器(qi),操(cao)作(zuo)簡單便(bian)利(li),而且能節約用(yong)(yong)(yong)電(dian),一臺保溫(wen)爐比用(yong)(yong)(yong)調(diao)(diao)壓變壓器(qi)每晝夜可(ke)(ke)以(yi)節省(sheng)300度(du)電(dian),又能為生產自動化創造(zao)了條件。
另外,由于升液(ye)管(guan)的工(gong)作(zuo)(zuo)條件惡劣,鑄(zhu)造科技工(gong)作(zuo)(zuo)者正在尋(xun)求(qiu)更好的材料和合理(li)的措施以提(ti)高其壽命(ming)。現有(you)(you)資(zi)料表明(ming):采用(yong)含(han)磷(lin)2.7%的鑄(zhu)鐵、含(han)銅6.5%的鑄(zhu)鐵、高錳鑄(zhu)鐵或(huo)用(yong)具(ju)有(you)(you)D型石墨的珠光體基體的孕育鑄(zhu)鐵鑄(zhu)造升液(ye)管(guan),其壽命(ming)可能延長(chang),可用(yong)120h以上(shang);有(you)(you)的采用(yong)普通鑄(zhu)鐵管(guan)進(jin)行表面滲硫(liu)處理(li),在鋁液(ye)中(zhong)的壽命(ming)約可提(ti)高3倍;有(you)(you)的在鑄(zhu)鐵管(guan)表面噴鍍(du)一層三氧(yang)化(hua)(hua)(hua)(hua)二鋁、氧(yang)化(hua)(hua)(hua)(hua)鋯或(huo)氧(yang)化(hua)(hua)(hua)(hua)鉻等材料,升液(ye)管(guan)在鋁液(ye)中(zhong)的壽命(ming)可達700h;有(you)(you)的試用(yong)氮化(hua)(hua)(hua)(hua)硅(gui)、碳化(hua)(hua)(hua)(hua)硅(gui)或(huo)氧(yang)化(hua)(hua)(hua)(hua)硼等耐(nai)熱(re)陶瓷作(zuo)(zuo)升液(ye)管(guan),雖(sui)然(ran)成本高,但在鋁液(ye)中(zhong)可用(yong)半年以上(shang);還有(you)(you)用(yong)石棉(mian)耐(nai)熱(re)硅(gui)酸鹽(yan)作(zuo)(zuo)升液(ye)管(guan),在三班連續作(zuo)(zuo)業的情況下,可使用(yong)4~5個(ge)月(yue),效(xiao)果良好。