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)管(guan)的(de)工作條件惡劣,鑄(zhu)(zhu)(zhu)造科技工作者正在(zai)尋求更好(hao)的(de)材(cai)料和合理的(de)措施以(yi)提(ti)高其壽命(ming)。現有(you)資料表(biao)明:采(cai)用(yong)(yong)(yong)(yong)含(han)磷2.7%的(de)鑄(zhu)(zhu)(zhu)鐵、含(han)銅6.5%的(de)鑄(zhu)(zhu)(zhu)鐵、高錳(meng)鑄(zhu)(zhu)(zhu)鐵或(huo)用(yong)(yong)(yong)(yong)具有(you)D型石墨的(de)珠光體(ti)基體(ti)的(de)孕育鑄(zhu)(zhu)(zhu)鐵鑄(zhu)(zhu)(zhu)造升液(ye)管(guan),其壽命(ming)可(ke)能延長(chang),可(ke)用(yong)(yong)(yong)(yong)120h以(yi)上;有(you)的(de)采(cai)用(yong)(yong)(yong)(yong)普通鑄(zhu)(zhu)(zhu)鐵管(guan)進(jin)行表(biao)面滲硫處理,在(zai)鋁液(ye)中(zhong)(zhong)的(de)壽命(ming)約可(ke)提(ti)高3倍;有(you)的(de)在(zai)鑄(zhu)(zhu)(zhu)鐵管(guan)表(biao)面噴(pen)鍍一層三氧(yang)(yang)化(hua)二鋁、氧(yang)(yang)化(hua)鋯或(huo)氧(yang)(yang)化(hua)鉻等(deng)材(cai)料,升液(ye)管(guan)在(zai)鋁液(ye)中(zhong)(zhong)的(de)壽命(ming)可(ke)達700h;有(you)的(de)試用(yong)(yong)(yong)(yong)氮化(hua)硅(gui)、碳化(hua)硅(gui)或(huo)氧(yang)(yang)化(hua)硼等(deng)耐熱(re)陶瓷作升液(ye)管(guan),雖然成(cheng)本高,但在(zai)鋁液(ye)中(zhong)(zhong)可(ke)用(yong)(yong)(yong)(yong)半(ban)年以(yi)上;還有(you)用(yong)(yong)(yong)(yong)石棉耐熱(re)硅(gui)酸鹽作升液(ye)管(guan),在(zai)三班連續作業的(de)情況下(xia),可(ke)使(shi)用(yong)(yong)(yong)(yong)4~5個月,效果良(liang)好(hao)。