保溫劑即(ji)覆(fu)蓋在(zai)(zai)鋼液(ye)面(mian)的(de)(de)(de)(de)(de)一(yi)種絕(jue)熱(re)(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)材(cai)(cai)料(liao)。有(you)(you)絕(jue)熱(re)(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)型和發熱(re)(re)(re)(re)絕(jue)熱(re)(re)(re)(re)型兩(liang)種。據專家介紹(shao)根據使用(yong)場合(he)不(bu)(bu)同，又可分為鑄(zhu)錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)、鋼包與(yu)中間罐覆(fu)蓋劑(ji)；有(you)(you)粉(fen)狀、顆粒狀或板狀。鑄(zhu)錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)有(you)(you)時(shi)稱為防(fang)縮孔(kong)(kong)劑(ji)，它的(de)(de)(de)(de)(de)作(zuo)用(yong)是(shi)延緩鋼錠(ding)(ding)(ding)糢內頭部(bu)鋼液(ye)凝(ning)固時(shi)間，改善鋼錠(ding)(ding)(ding)頭部(bu)縮孔(kong)(kong)形(xing)狀，有(you)(you)利(li)于減(jian)(jian)少冒口體(ti)積，提(ti)高(gao)鋼錠(ding)(ding)(ding)成(cheng)坯率(lv)。由干延緩鋼錠(ding)(ding)(ding)頭部(bu)凝(ning)固時(shi)間，推遲了(le)頭部(bu)結晶的(de)(de)(de)(de)(de)形(xing)成(cheng)，特(te)別(bie)是(shi)使用(yong)發熱(re)(re)(re)(re)絕(jue)熱(re)(re)(re)(re)型保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)時(shi)，有(you)(you)利(li)干減(jian)(jian)少鋼錠(ding)(ding)(ding)底部(bu)沉積錐(zhui)處(chu)的(de)(de)(de)(de)(de)偏析，從而(er)(er)提(ti)高(gao)鋼錠(ding)(ding)(ding)的(de)(de)(de)(de)(de)質(zhi)(zhi)量。下面(mian)河南耐(nai)火(huo)(huo)材(cai)(cai)料(liao)廠(chang)為大(da)家詳(xiang)解下保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)配(pei)方(fang)。絕(jue)熱(re)(re)(re)(re)型鑄(zhu)錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)通(tong)常由耐(nai)火(huo)(huo)骨(gu)料(liao)，碳質(zhi)(zhi)材(cai)(cai)料(liao)和添加一(yi)些多(duo)(duo)孔(kong)(kong)型物質(zhi)(zhi)組成(cheng)（如纖維(wei)(wei)、碳化稻殼、膨脹石墨(mo)等）要(yao)求在(zai)(zai)高(gao)溫(wen)(wen)(wen)(wen)(wen)條件下不(bu)(bu)燒結，維(wei)(wei)持(chi)粉(fen)體(ti)，且容重小，氣(qi)孔(kong)(kong)率(lv)高(gao)，從而(er)(er)具有(you)(you)顯熱(re)(re)(re)(re)量小，保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)好的(de)(de)(de)(de)(de)特(te)點。耐(nai)火(huo)(huo)骨(gu)料(liao)除(chu)要(yao)求較高(gao)的(de)(de)(de)(de)(de)耐(nai)火(huo)(huo)度(du)外(wai)，粒度(du)大(da)小是(shi)至關(guan)重要(yao)的(de)(de)(de)(de)(de)，粒度(du)愈(yu)小，保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)愈(yu)好，其(qi)(qi)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)與(yu)耐(nai)火(huo)(huo)骨(gu)料(liao)本(ben)身導熱(re)(re)(re)(re)系數(shu)幾乎關(guan)系不(bu)(bu)大(da)；碳質(zhi)(zhi)耐(nai)火(huo)(huo)材(cai)(cai)料(liao)高(gao)溫(wen)(wen)(wen)(wen)(wen)下導熱(re)(re)(re)(re)系數(shu)低，有(you)(you)強防(fang)輻(fu)射能(neng)力(li)（如片狀石墨(mo)〉和阻(zu)止耐(nai)火(huo)(huo)材(cai)(cai)料(liao)燒結傾向，是(shi)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)中不(bu)(bu)能(neng)缺少的(de)(de)(de)(de)(de)材(cai)(cai)料(liao)，加入(ru)少量多(duo)(duo)孔(kong)(kong)型的(de)(de)(de)(de)(de)物質(zhi)(zhi)可以降低容重，提(ti)高(gao)氣(qi)孔(kong)(kong)率(lv)，有(you)(you)利(li)于減(jian)(jian)少保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)材(cai)(cai)料(liao)的(de)(de)(de)(de)(de)吸(xi)熱(re)(re)(re)(re)及提(ti)髙保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)。發生反(fan)應(ying)，放(fang)出大(da)量熱(re)(re)(re)(re)量，其(qi)(qi)升高(gao)溫(wen)(wen)(wen)(wen)(wen)度(du)不(bu)(bu)僅取決于鋁含(han)量的(de)(de)(de)(de)(de)高(gao)低，粒度(du)分布，還與(yu)反(fan)應(ying)速(su)度(du)及反(fan)應(ying)環境(jing)及的(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)有(you)(you)關(guan)。所(suo)以發熱(re)(re)(re)(re)型的(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)必須包含(han)有(you)(you)良好絕(jue)熱(re)(re)(re)(re)牲能(neng)的(de)(de)(de)(de)(de)耐(nai)火(huo)(huo)骨(gu)料(liao)，除(chu)此之(zhi)外(wai)，在(zai)(zai)使用(yong)時(shi)，要(yao)求有(you)(you)良好的(de)(de)(de)(de)(de)鋪(pu)展性(xing)(xing)，特(te)別(bie)對于扁(bian)錠(ding)(ding)(ding)尤(you)為重要(yao)。絕(jue)熱(re)(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)型保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)，在(zai)(zai)鋼錠(ding)(ding)(ding)使用(yong)時(shi)，有(you)(you)時(shi)為了(le)操作(zuo)方(fang)便，把保(bao)(bao)(bao)(bao)護(hu)渣和保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)劑(ji)，合(he)而(er)(er)為一(yi)使用(yong)。