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,由于升液(ye)(ye)(ye)管(guan)(guan)的(de)(de)工(gong)作(zuo)條件(jian)惡劣,鑄造科技工(gong)作(zuo)者正在(zai)尋求更好(hao)的(de)(de)材(cai)料(liao)(liao)和合理(li)(li)的(de)(de)措施以(yi)提高(gao)(gao)其(qi)壽(shou)命(ming)。現有(you)資料(liao)(liao)表(biao)明:采用(yong)(yong)(yong)(yong)(yong)(yong)含(han)磷(lin)2.7%的(de)(de)鑄鐵、含(han)銅6.5%的(de)(de)鑄鐵、高(gao)(gao)錳鑄鐵或(huo)用(yong)(yong)(yong)(yong)(yong)(yong)具有(you)D型石墨(mo)的(de)(de)珠光體(ti)(ti)基體(ti)(ti)的(de)(de)孕(yun)育(yu)鑄鐵鑄造升液(ye)(ye)(ye)管(guan)(guan),其(qi)壽(shou)命(ming)可能延長,可用(yong)(yong)(yong)(yong)(yong)(yong)120h以(yi)上;有(you)的(de)(de)采用(yong)(yong)(yong)(yong)(yong)(yong)普通鑄鐵管(guan)(guan)進行表(biao)面(mian)滲(shen)硫處理(li)(li),在(zai)鋁(lv)液(ye)(ye)(ye)中(zhong)的(de)(de)壽(shou)命(ming)約(yue)可提高(gao)(gao)3倍;有(you)的(de)(de)在(zai)鑄鐵管(guan)(guan)表(biao)面(mian)噴鍍一層三(san)(san)氧(yang)化(hua)(hua)二(er)鋁(lv)、氧(yang)化(hua)(hua)鋯(gao)或(huo)氧(yang)化(hua)(hua)鉻(ge)等(deng)材(cai)料(liao)(liao),升液(ye)(ye)(ye)管(guan)(guan)在(zai)鋁(lv)液(ye)(ye)(ye)中(zhong)的(de)(de)壽(shou)命(ming)可達700h;有(you)的(de)(de)試用(yong)(yong)(yong)(yong)(yong)(yong)氮化(hua)(hua)硅、碳化(hua)(hua)硅或(huo)氧(yang)化(hua)(hua)硼(peng)等(deng)耐熱(re)陶瓷作(zuo)升液(ye)(ye)(ye)管(guan)(guan),雖然成本(ben)高(gao)(gao),但在(zai)鋁(lv)液(ye)(ye)(ye)中(zhong)可用(yong)(yong)(yong)(yong)(yong)(yong)半年以(yi)上;還有(you)用(yong)(yong)(yong)(yong)(yong)(yong)石棉耐熱(re)硅酸鹽(yan)作(zuo)升液(ye)(ye)(ye)管(guan)(guan),在(zai)三(san)(san)班(ban)連續(xu)作(zuo)業(ye)的(de)(de)情(qing)況下,可使用(yong)(yong)(yong)(yong)(yong)(yong)4~5個月,效(xiao)果良(liang)好(hao)。