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)(sheng)液(ye)(ye)管(guan)的(de)工作條件惡(e)劣,鑄(zhu)(zhu)(zhu)(zhu)(zhu)造科技工作者正在(zai)尋求(qiu)更好的(de)材料和合理(li)的(de)措施(shi)以提高(gao)(gao)其壽(shou)命(ming)。現有(you)(you)資(zi)料表(biao)明(ming):采(cai)用(yong)(yong)(yong)(yong)含磷2.7%的(de)鑄(zhu)(zhu)(zhu)(zhu)(zhu)鐵(tie)、含銅6.5%的(de)鑄(zhu)(zhu)(zhu)(zhu)(zhu)鐵(tie)、高(gao)(gao)錳(meng)鑄(zhu)(zhu)(zhu)(zhu)(zhu)鐵(tie)或(huo)用(yong)(yong)(yong)(yong)具(ju)有(you)(you)D型石(shi)墨(mo)的(de)珠光體(ti)基(ji)體(ti)的(de)孕育(yu)鑄(zhu)(zhu)(zhu)(zhu)(zhu)鐵(tie)鑄(zhu)(zhu)(zhu)(zhu)(zhu)造升(sheng)(sheng)液(ye)(ye)管(guan),其壽(shou)命(ming)可能延長,可用(yong)(yong)(yong)(yong)120h以上;有(you)(you)的(de)采(cai)用(yong)(yong)(yong)(yong)普通鑄(zhu)(zhu)(zhu)(zhu)(zhu)鐵(tie)管(guan)進行表(biao)面滲(shen)硫(liu)處理(li),在(zai)鋁液(ye)(ye)中(zhong)的(de)壽(shou)命(ming)約(yue)可提高(gao)(gao)3倍(bei);有(you)(you)的(de)在(zai)鑄(zhu)(zhu)(zhu)(zhu)(zhu)鐵(tie)管(guan)表(biao)面噴(pen)鍍一層三(san)氧(yang)化(hua)二鋁、氧(yang)化(hua)鋯(gao)或(huo)氧(yang)化(hua)鉻(ge)等材料,升(sheng)(sheng)液(ye)(ye)管(guan)在(zai)鋁液(ye)(ye)中(zhong)的(de)壽(shou)命(ming)可達700h;有(you)(you)的(de)試用(yong)(yong)(yong)(yong)氮化(hua)硅、碳化(hua)硅或(huo)氧(yang)化(hua)硼等耐(nai)熱(re)陶瓷(ci)作升(sheng)(sheng)液(ye)(ye)管(guan),雖(sui)然成本高(gao)(gao),但(dan)在(zai)鋁液(ye)(ye)中(zhong)可用(yong)(yong)(yong)(yong)半年(nian)以上;還有(you)(you)用(yong)(yong)(yong)(yong)石(shi)棉耐(nai)熱(re)硅酸鹽作升(sheng)(sheng)液(ye)(ye)管(guan),在(zai)三(san)班連續作業的(de)情況(kuang)下,可使用(yong)(yong)(yong)(yong)4~5個月,效果良(liang)好。