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(ling)外,由于(yu)升(sheng)(sheng)液(ye)(ye)(ye)管(guan)的工(gong)作(zuo)(zuo)條(tiao)件惡劣(lie),鑄(zhu)(zhu)造(zao)科(ke)技(ji)工(gong)作(zuo)(zuo)者正在(zai)尋求更好(hao)的材(cai)(cai)料(liao)和合理的措(cuo)施以(yi)提高其壽(shou)命。現有(you)資料(liao)表明:采用(yong)(yong)含(han)磷2.7%的鑄(zhu)(zhu)鐵(tie)(tie)(tie)、含(han)銅(tong)6.5%的鑄(zhu)(zhu)鐵(tie)(tie)(tie)、高錳鑄(zhu)(zhu)鐵(tie)(tie)(tie)或(huo)用(yong)(yong)具有(you)D型(xing)石(shi)墨的珠(zhu)光體(ti)基體(ti)的孕(yun)育鑄(zhu)(zhu)鐵(tie)(tie)(tie)鑄(zhu)(zhu)造(zao)升(sheng)(sheng)液(ye)(ye)(ye)管(guan),其壽(shou)命可(ke)能延長,可(ke)用(yong)(yong)120h以(yi)上;有(you)的采用(yong)(yong)普通鑄(zhu)(zhu)鐵(tie)(tie)(tie)管(guan)進行(xing)表面(mian)滲硫處理,在(zai)鋁(lv)液(ye)(ye)(ye)中(zhong)的壽(shou)命約(yue)可(ke)提高3倍;有(you)的在(zai)鑄(zhu)(zhu)鐵(tie)(tie)(tie)管(guan)表面(mian)噴(pen)鍍一層(ceng)三氧化二鋁(lv)、氧化鋯(gao)或(huo)氧化鉻等(deng)材(cai)(cai)料(liao),升(sheng)(sheng)液(ye)(ye)(ye)管(guan)在(zai)鋁(lv)液(ye)(ye)(ye)中(zhong)的壽(shou)命可(ke)達700h;有(you)的試用(yong)(yong)氮化硅、碳(tan)化硅或(huo)氧化硼等(deng)耐熱(re)陶瓷作(zuo)(zuo)升(sheng)(sheng)液(ye)(ye)(ye)管(guan),雖然成本高,但在(zai)鋁(lv)液(ye)(ye)(ye)中(zhong)可(ke)用(yong)(yong)半(ban)年以(yi)上;還(huan)有(you)用(yong)(yong)石(shi)棉耐熱(re)硅酸鹽作(zuo)(zuo)升(sheng)(sheng)液(ye)(ye)(ye)管(guan),在(zai)三班連續(xu)作(zuo)(zuo)業的情況下,可(ke)使用(yong)(yong)4~5個月,效果良好(hao)。