保溫劑即(ji)覆蓋在鋼(gang)液面的(de)(de)(de)(de)一種絕(jue)(jue)熱(re)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)材(cai)料。有(you)(you)絕(jue)(jue)熱(re)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)型(xing)(xing)和發(fa)熱(re)絕(jue)(jue)熱(re)型(xing)(xing)兩(liang)種。據(ju)專家(jia)介紹(shao)根據(ju)使用(yong)(yong)場合不(bu)同(tong)，又可分為(wei)鑄錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)、鋼(gang)包與中(zhong)間罐覆蓋劑(ji)(ji)；有(you)(you)粉狀(zhuang)、顆(ke)粒(li)狀(zhuang)或板狀(zhuang)。鑄錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)有(you)(you)時(shi)稱為(wei)防縮(suo)孔劑(ji)(ji)，它的(de)(de)(de)(de)作用(yong)(yong)是(shi)(shi)延緩(huan)鋼(gang)錠(ding)(ding)(ding)糢內頭部(bu)(bu)鋼(gang)液凝(ning)固時(shi)間，改善鋼(gang)錠(ding)(ding)(ding)頭部(bu)(bu)縮(suo)孔形狀(zhuang)，有(you)(you)利于減(jian)(jian)少冒口體(ti)積(ji)(ji)，提高(gao)(gao)鋼(gang)錠(ding)(ding)(ding)成(cheng)坯率(lv)。由(you)干(gan)延緩(huan)鋼(gang)錠(ding)(ding)(ding)頭部(bu)(bu)凝(ning)固時(shi)間，推遲了(le)頭部(bu)(bu)結晶的(de)(de)(de)(de)形成(cheng)，特(te)(te)(te)別是(shi)(shi)使用(yong)(yong)發(fa)熱(re)絕(jue)(jue)熱(re)型(xing)(xing)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)時(shi)，有(you)(you)利干(gan)減(jian)(jian)少鋼(gang)錠(ding)(ding)(ding)底部(bu)(bu)沉積(ji)(ji)錐處的(de)(de)(de)(de)偏析(xi)，從而提高(gao)(gao)鋼(gang)錠(ding)(ding)(ding)的(de)(de)(de)(de)質量(liang)。下(xia)面河南耐(nai)火(huo)(huo)材(cai)料廠為(wei)大(da)家(jia)詳解下(xia)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)配方。絕(jue)(jue)熱(re)型(xing)(xing)鑄錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)通(tong)常由(you)耐(nai)火(huo)(huo)骨料，碳質材(cai)料和添加一些多孔型(xing)(xing)物質組成(cheng)（如(ru)纖維(wei)、碳化稻殼、膨脹石墨等）要(yao)求在高(gao)(gao)溫(wen)(wen)(wen)條件下(xia)不(bu)燒(shao)結，維(wei)持粉體(ti)，且容重(zhong)(zhong)小(xiao)(xiao)，氣孔率(lv)高(gao)(gao)，從而具有(you)(you)顯熱(re)量(liang)小(xiao)(xiao)，保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)(xing)能好(hao)(hao)的(de)(de)(de)(de)特(te)(te)(te)點。耐(nai)火(huo)(huo)骨料除要(yao)求較高(gao)(gao)的(de)(de)(de)(de)耐(nai)火(huo)(huo)度外(wai)，粒(li)度大(da)小(xiao)(xiao)是(shi)(shi)至關重(zhong)(zhong)要(yao)的(de)(de)(de)(de)，粒(li)度愈(yu)小(xiao)(xiao)，保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)(xing)能愈(yu)好(hao)(hao)，其保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)(xing)能與耐(nai)火(huo)(huo)骨料本身導(dao)熱(re)系數幾(ji)乎關系不(bu)大(da)；碳質耐(nai)火(huo)(huo)材(cai)料高(gao)(gao)溫(wen)(wen)(wen)下(xia)導(dao)熱(re)系數低，有(you)(you)強防輻射(she)能力（如(ru)片狀(zhuang)石墨〉和阻止耐(nai)火(huo)(huo)材(cai)料燒(shao)結傾向，是(shi)(shi)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)中(zhong)不(bu)能缺少的(de)(de)(de)(de)材(cai)料，加入少量(liang)多孔型(xing)(xing)的(de)(de)(de)(de)物質可以(yi)降低容重(zhong)(zhong)，提高(gao)(gao)氣孔率(lv)，有(you)(you)利于減(jian)(jian)少保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)材(cai)料的(de)(de)(de)(de)吸熱(re)及(ji)提髙保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)(xing)能。發(fa)生(sheng)反(fan)(fan)應，放出(chu)大(da)量(liang)熱(re)量(liang)，其升高(gao)(gao)溫(wen)(wen)(wen)度不(bu)僅取決于鋁(lv)含(han)(han)量(liang)的(de)(de)(de)(de)高(gao)(gao)低，粒(li)度分布(bu)，還與反(fan)(fan)應速度及(ji)反(fan)(fan)應環(huan)境(jing)及(ji)的(de)(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)(xing)能有(you)(you)關。所以(yi)發(fa)熱(re)型(xing)(xing)的(de)(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)必(bi)須包含(han)(han)有(you)(you)良(liang)好(hao)(hao)絕(jue)(jue)熱(re)牲能的(de)(de)(de)(de)耐(nai)火(huo)(huo)骨料，除此之外(wai)，在使用(yong)(yong)時(shi)，要(yao)求有(you)(you)良(liang)好(hao)(hao)的(de)(de)(de)(de)鋪展(zhan)性(xing)(xing)，特(te)(te)(te)別對(dui)于扁錠(ding)(ding)(ding)尤(you)為(wei)重(zhong)(zhong)要(yao)。絕(jue)(jue)熱(re)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)型(xing)(xing)保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)，在鋼(gang)錠(ding)(ding)(ding)使用(yong)(yong)時(shi)，有(you)(you)時(shi)為(wei)了(le)操作方便，把保(bao)(bao)(bao)(bao)(bao)護渣和保(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)，合而為(wei)一使用(yong)(yong)。