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(you)于(yu)升(sheng)液(ye)管(guan)(guan)的(de)工作(zuo)條件(jian)惡劣,鑄(zhu)(zhu)造科技工作(zuo)者正在尋求更好的(de)材料(liao)和合理的(de)措施以提(ti)高(gao)其壽命(ming)。現有(you)(you)(you)資料(liao)表明(ming):采用(yong)(yong)含磷2.7%的(de)鑄(zhu)(zhu)鐵(tie)、含銅6.5%的(de)鑄(zhu)(zhu)鐵(tie)、高(gao)錳鑄(zhu)(zhu)鐵(tie)或(huo)用(yong)(yong)具有(you)(you)(you)D型石(shi)墨(mo)的(de)珠光體(ti)(ti)基體(ti)(ti)的(de)孕育鑄(zhu)(zhu)鐵(tie)鑄(zhu)(zhu)造升(sheng)液(ye)管(guan)(guan),其壽命(ming)可(ke)(ke)能(neng)延長,可(ke)(ke)用(yong)(yong)120h以上;有(you)(you)(you)的(de)采用(yong)(yong)普通鑄(zhu)(zhu)鐵(tie)管(guan)(guan)進行(xing)表面滲硫處理,在鋁(lv)液(ye)中(zhong)(zhong)的(de)壽命(ming)約可(ke)(ke)提(ti)高(gao)3倍;有(you)(you)(you)的(de)在鑄(zhu)(zhu)鐵(tie)管(guan)(guan)表面噴(pen)鍍一(yi)層三氧(yang)(yang)化(hua)(hua)(hua)(hua)(hua)二鋁(lv)、氧(yang)(yang)化(hua)(hua)(hua)(hua)(hua)鋯或(huo)氧(yang)(yang)化(hua)(hua)(hua)(hua)(hua)鉻(ge)等(deng)(deng)材料(liao),升(sheng)液(ye)管(guan)(guan)在鋁(lv)液(ye)中(zhong)(zhong)的(de)壽命(ming)可(ke)(ke)達700h;有(you)(you)(you)的(de)試用(yong)(yong)氮化(hua)(hua)(hua)(hua)(hua)硅(gui)、碳化(hua)(hua)(hua)(hua)(hua)硅(gui)或(huo)氧(yang)(yang)化(hua)(hua)(hua)(hua)(hua)硼等(deng)(deng)耐熱陶瓷作(zuo)升(sheng)液(ye)管(guan)(guan),雖然成本高(gao),但在鋁(lv)液(ye)中(zhong)(zhong)可(ke)(ke)用(yong)(yong)半年(nian)以上;還有(you)(you)(you)用(yong)(yong)石(shi)棉(mian)耐熱硅(gui)酸(suan)鹽作(zuo)升(sheng)液(ye)管(guan)(guan),在三班連續(xu)作(zuo)業(ye)的(de)情況下(xia),可(ke)(ke)使用(yong)(yong)4~5個(ge)月,效果良好。