保溫爐是一臺容量可達600公斤的臥式有(you)鐵芯工(gong)頻感(gan)應電爐,為了便(bian)于控制爐內熔融(rong)金屬的溫度(du),可以(yi)采(cai)用(yong)調壓(ya)(ya)變壓(ya)(ya)器進行保(bao)溫,但這種舊式設備操作(zuo)麻煩,二來消耗(hao)電力多,設備占用(yong)面(mian)積也大,采(cai)用(yong)可控硅(gui)交流調壓(ya)(ya)器,操作(zuo)簡單便(bian)利(li),而且能(neng)(neng)節約用(yong)電,一臺保(bao)溫爐比用(yong)調壓(ya)(ya)變壓(ya)(ya)器每晝夜可以(yi)節省300度(du)電,又能(neng)(neng)為生產自動(dong)化創(chuang)造(zao)了條件。
另外,由(you)于升(sheng)(sheng)液(ye)(ye)管(guan)(guan)(guan)的工(gong)作(zuo)條件惡(e)劣,鑄(zhu)(zhu)造科技工(gong)作(zuo)者正在尋(xun)求(qiu)更好的材(cai)料(liao)和合(he)理的措施以提高其壽(shou)(shou)命。現(xian)有資料(liao)表(biao)明:采(cai)用(yong)含磷2.7%的鑄(zhu)(zhu)鐵(tie)(tie)、含銅6.5%的鑄(zhu)(zhu)鐵(tie)(tie)、高錳鑄(zhu)(zhu)鐵(tie)(tie)或用(yong)具有D型石(shi)墨的珠光體基體的孕育鑄(zhu)(zhu)鐵(tie)(tie)鑄(zhu)(zhu)造升(sheng)(sheng)液(ye)(ye)管(guan)(guan)(guan),其壽(shou)(shou)命可能延長,可用(yong)120h以上;有的采(cai)用(yong)普通鑄(zhu)(zhu)鐵(tie)(tie)管(guan)(guan)(guan)進行表(biao)面滲硫(liu)處理,在鋁(lv)液(ye)(ye)中(zhong)的壽(shou)(shou)命約可提高3倍;有的在鑄(zhu)(zhu)鐵(tie)(tie)管(guan)(guan)(guan)表(biao)面噴(pen)鍍一層三(san)氧化(hua)(hua)(hua)二鋁(lv)、氧化(hua)(hua)(hua)鋯或氧化(hua)(hua)(hua)鉻等材(cai)料(liao),升(sheng)(sheng)液(ye)(ye)管(guan)(guan)(guan)在鋁(lv)液(ye)(ye)中(zhong)的壽(shou)(shou)命可達700h;有的試用(yong)氮化(hua)(hua)(hua)硅(gui)、碳化(hua)(hua)(hua)硅(gui)或氧化(hua)(hua)(hua)硼等耐熱(re)陶瓷作(zuo)升(sheng)(sheng)液(ye)(ye)管(guan)(guan)(guan),雖然(ran)成本(ben)高,但在鋁(lv)液(ye)(ye)中(zhong)可用(yong)半年(nian)以上;還有用(yong)石(shi)棉耐熱(re)硅(gui)酸鹽作(zuo)升(sheng)(sheng)液(ye)(ye)管(guan)(guan)(guan),在三(san)班(ban)連(lian)續作(zuo)業(ye)的情況下,可使用(yong)4~5個(ge)月(yue),效果良好。