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(wai),由(you)于升液(ye)管(guan)的工(gong)(gong)作條件(jian)惡劣,鑄(zhu)(zhu)(zhu)(zhu)造(zao)科技工(gong)(gong)作者(zhe)正在尋求更好的材料(liao)和合(he)理的措施以提(ti)高其壽(shou)(shou)命(ming)。現有(you)資(zi)料(liao)表(biao)明:采用(yong)(yong)含磷2.7%的鑄(zhu)(zhu)(zhu)(zhu)鐵(tie)、含銅6.5%的鑄(zhu)(zhu)(zhu)(zhu)鐵(tie)、高錳鑄(zhu)(zhu)(zhu)(zhu)鐵(tie)或用(yong)(yong)具有(you)D型石墨的珠光體基體的孕育鑄(zhu)(zhu)(zhu)(zhu)鐵(tie)鑄(zhu)(zhu)(zhu)(zhu)造(zao)升液(ye)管(guan),其壽(shou)(shou)命(ming)可(ke)能延長,可(ke)用(yong)(yong)120h以上;有(you)的采用(yong)(yong)普通(tong)鑄(zhu)(zhu)(zhu)(zhu)鐵(tie)管(guan)進行表(biao)面滲硫(liu)處理,在鋁(lv)液(ye)中的壽(shou)(shou)命(ming)約可(ke)提(ti)高3倍;有(you)的在鑄(zhu)(zhu)(zhu)(zhu)鐵(tie)管(guan)表(biao)面噴鍍(du)一(yi)層三氧(yang)(yang)化(hua)(hua)(hua)二(er)鋁(lv)、氧(yang)(yang)化(hua)(hua)(hua)鋯(gao)或氧(yang)(yang)化(hua)(hua)(hua)鉻等(deng)材料(liao),升液(ye)管(guan)在鋁(lv)液(ye)中的壽(shou)(shou)命(ming)可(ke)達700h;有(you)的試(shi)用(yong)(yong)氮化(hua)(hua)(hua)硅(gui)、碳化(hua)(hua)(hua)硅(gui)或氧(yang)(yang)化(hua)(hua)(hua)硼等(deng)耐熱陶瓷作升液(ye)管(guan),雖(sui)然成本高,但(dan)在鋁(lv)液(ye)中可(ke)用(yong)(yong)半(ban)年以上;還有(you)用(yong)(yong)石棉耐熱硅(gui)酸(suan)鹽作升液(ye)管(guan),在三班連續作業的情況下,可(ke)使(shi)用(yong)(yong)4~5個月(yue),效果良好。