節能真空熔煉爐，是在傳統真空熔煉爐基礎上，添加設了一個上爐室一個下爐室及一個安裝在上爐室與爐蓋之間能阻隔上爐室與主爐室的碟閥和一個安裝在爐底與下爐室之間能阻隔主爐室與下爐室的閘板閥。  

它(ta)的(de)長(chang)處在于其在澆(jiao)注之前(qian)模(mo)具(ju)(ju)和加熱器、坩堝等高溫器材是(shi)被閘板(ban)閥(fa)阻隔開的(de)，又通(tong)入了惰性氣體，這樣(yang)，模(mo)具(ju)(ju)及(ji)成品的(de)降溫時(shi)間就(jiu)大大地縮短了，當質料(liao)再次投入時(shi)可有效地利用主爐室(shi)的(de)余(yu)熱，不(bu)僅(jin)可節約能(neng)源50％左右(you)，而(er)且(qie)重復投料(liao)澆(jiao)注可進步出產功(gong)率(lv)50％左右(you)。

真空熔煉(lian)爐(lu)它(ta)是由上(shang)(shang)(shang)軸驅(qu)動、上(shang)(shang)(shang)軸、投料(liao)倉、上(shang)(shang)(shang)爐(lu)室、蝶閥(fa)、爐(lu)蓋、坩蝸、加(jia)熱(re)器、主爐(lu)室、錐(zhui)度(du)塞(sai)、爐(lu)底(di)、閘板閥(fa)、模具、下(xia)爐(lu)室、爐(lu)架、下(xia)軸構(gou)成。

其特征在(zai)于(yu)：在(zai)主爐(lu)(lu)(lu)室(shi)(shi)的上(shang)部增設(she)了一個上(shang)爐(lu)(lu)(lu)室(shi)(shi)，在(zai)主爐(lu)(lu)(lu)室(shi)(shi)的爐(lu)(lu)(lu)蓋與上(shang)爐(lu)(lu)(lu)室(shi)(shi)之間設(she)置有蝶(die)閥(fa)，在(zai)主爐(lu)(lu)(lu)室(shi)(shi)的下部增設(she)了一個下爐(lu)(lu)(lu)室(shi)(shi)，在(zai)主爐(lu)(lu)(lu)室(shi)(shi)的爐(lu)(lu)(lu)底與下爐(lu)(lu)(lu)室(shi)(shi)之間設(she)置有閘板閥(fa)。

在真(zhen)空條件下(xia)運用(yong)電(dian)(dian)(dian)(dian)弧(hu)來加熱和熔(rong)(rong)煉(lian)金(jin)屬的熔(rong)(rong)煉(lian)方法(fa)。這種(zhong)熔(rong)(rong)煉(lian)方法(fa)所運用(yong)的電(dian)(dian)(dian)(dian)極(ji)(ji)有自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)和非(fei)自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)兩種(zhong)。自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)是由被熔(rong)(rong)煉(lian)資料(liao)(liao)(即爐(lu)料(liao)(liao))制(zhi)成，在熔(rong)(rong)煉(lian)過程(cheng)中(zhong)它逐(zhu)漸耗(hao)費(fei)；而非(fei)自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)系(xi)運用(yong)鎢等高熔(rong)(rong)點資料(liao)(liao)制(zhi)成，在爐(lu)料(liao)(liao)熔(rong)(rong)煉(lian)過程(cheng)中(zhong)它基本上不耗(hao)費(fei)。采用(yong)自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)的真(zhen)空電(dian)(dian)(dian)(dian)弧(hu)爐(lu)稱自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)(dian)弧(hu)爐(lu)，簡(jian)稱自(zi)耗(hao)爐(lu);采用(yong)非(fei)自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)的真(zhen)空電(dian)(dian)(dian)(dian)弧(hu)爐(lu)稱非(fei)自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)(dian)弧(hu)爐(lu)，簡(jian)稱非(fei)自(zi)耗(hao)爐(lu)。非(fei)自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)熔(rong)(rong)煉(lian)已較(jiao)少運用(yong)，而自(zi)耗(hao)電(dian)(dian)(dian)(dian)極(ji)(ji)熔(rong)(rong)煉(lian)很多應用(yong)于(yu)出產實踐(jian)中(zhong)，成為二次(ci)重熔(rong)(rong)的主要手段(duan)之一。