爐身(shen)熔(rong)池(chi)部份,鋼(gang)板與耐火材料之(zhi)間襯以(yi)(yi)5毫米的(de)隔熱石(shi)(shi)棉板,熔(rong)池(chi)由普通粘土(tu)耐火磚(zhuan)(zhuan)(zhuan)(zhuan)砌(qi)(qi)(qi)成長(chang)方形,前(qian)(qian)墻(qiang)(qiang)(qiang)的(de)下(xia)部(安(an)裝結晶(jing)器(qi)的(de)部位)砌(qi)(qi)(qi)一塊65X230X230毫米外方內圓的(de)粘土(tu)磚(zhuan)(zhuan)(zhuan)(zhuan)以(yi)(yi)備嵌(qian)入石(shi)(shi)墨底(di)座,前(qian)(qian)墻(qiang)(qiang)(qiang)的(de)上(shang)部也只宜砌(qi)(qi)(qi)130毫米厚(hou)的(de)粘土(tu)磚(zhuan)(zhuan)(zhuan)(zhuan)與石(shi)(shi)棉板貼緊,因為(wei)此處需要安(an)裝石(shi)(shi)墨塞桿,前(qian)(qian)墻(qiang)(qiang)(qiang)過厚(hou)將使(shi)石(shi)(shi)墨底(di)座增長(chang),影響(xiang)拉鑄時的(de)液體金屬溫度過早下(xia)降,實(shi)踐證(zheng)明(ming)前(qian)(qian)墻(qiang)(qiang)(qiang)過厚(hou)是不利于拉鑄的(de),兩邊側墻(qiang)(qiang)(qiang)及后墻(qiang)(qiang)(qiang)可以(yi)(yi)砌(qi)(qi)(qi)130毫米厚(hou)的(de)耐火磚(zhuan)(zhuan)(zhuan)(zhuan),砌(qi)(qi)(qi)磚(zhuan)(zhuan)(zhuan)(zhuan)與爐殼之(zhi)間的(de)空(kong)隙用石(shi)(shi)英(ying)砂(sha)填充,熔(rong)池(chi)底(di)部則可以(yi)(yi)砌(qi)(qi)(qi)200毫米左(zuo)右的(de)耐火磚(zhuan)(zhuan)(zhuan)(zhuan)并(bing)墊以(yi)(yi)石(shi)(shi)英(ying)砂(sha),應根據安(an)裝結晶(jing)器(qi)位置的(de)高(gao)低(di)來調(diao)節,熔(rong)池(chi)底(di)部可以(yi)(yi)適(shi)當砌(qi)(qi)(qi)厚(hou)些。
爐底石(shi)部份:用大(da)小不(bu)同(tong)粒度的石(shi)英砂筑成,石(shi)英砂含二氧化硅(SiO2)不(bu)低于98.5%,應是干燥,潔凈的,另外加(jia)入粘結劑——硼酸3~3.5%。