爐身(shen)熔(rong)(rong)池部份,鋼板與耐(nai)(nai)火(huo)材(cai)料之(zhi)間襯以(yi)(yi)5毫米的隔熱(re)石棉(mian)板,熔(rong)(rong)池由普通(tong)粘(zhan)(zhan)土(tu)耐(nai)(nai)火(huo)磚(zhuan)(zhuan)砌(qi)(qi)(qi)成(cheng)長方(fang)形,前(qian)(qian)墻(qiang)的下部(安裝(zhuang)結晶器的部位)砌(qi)(qi)(qi)一塊65X230X230毫米外方(fang)內圓(yuan)的粘(zhan)(zhan)土(tu)磚(zhuan)(zhuan)以(yi)(yi)備嵌(qian)入石墨底(di)(di)座(zuo),前(qian)(qian)墻(qiang)的上部也只宜砌(qi)(qi)(qi)130毫米厚的粘(zhan)(zhan)土(tu)磚(zhuan)(zhuan)與石棉(mian)板貼緊,因為此處需要安裝(zhuang)石墨塞桿(gan),前(qian)(qian)墻(qiang)過(guo)厚將使石墨底(di)(di)座(zuo)增長,影響拉鑄時的液體金(jin)屬溫度過(guo)早下降,實踐(jian)證(zheng)明前(qian)(qian)墻(qiang)過(guo)厚是(shi)不利于(yu)拉鑄的,兩(liang)邊側墻(qiang)及后墻(qiang)可以(yi)(yi)砌(qi)(qi)(qi)130毫米厚的耐(nai)(nai)火(huo)磚(zhuan)(zhuan),砌(qi)(qi)(qi)磚(zhuan)(zhuan)與爐殼(ke)之(zhi)間的空隙用石英(ying)砂(sha)填充,熔(rong)(rong)池底(di)(di)部則(ze)可以(yi)(yi)砌(qi)(qi)(qi)200毫米左右的耐(nai)(nai)火(huo)磚(zhuan)(zhuan)并墊(dian)以(yi)(yi)石英(ying)砂(sha),應根(gen)據安裝(zhuang)結晶器位置的高低來調節(jie),熔(rong)(rong)池底(di)(di)部可以(yi)(yi)適當(dang)砌(qi)(qi)(qi)厚些。
爐底(di)石(shi)部份(fen):用大小不同粒度的石(shi)英(ying)砂(sha)筑成(cheng),石(shi)英(ying)砂(sha)含二氧化硅(SiO2)不低于98.5%,應是干燥,潔凈的,另(ling)外加入(ru)粘結(jie)劑——硼酸(suan)3~3.5%。