保溫劑即覆蓋在(zai)鋼(gang)液面的(de)一(yi)(yi)種(zhong)絕(jue)熱(re)(re)保(bao)(bao)溫(wen)(wen)(wen)材(cai)(cai)料(liao)(liao)(liao)。有(you)(you)(you)絕(jue)熱(re)(re)保(bao)(bao)溫(wen)(wen)(wen)型(xing)(xing)(xing)(xing)和(he)(he)發熱(re)(re)絕(jue)熱(re)(re)型(xing)(xing)(xing)(xing)兩種(zhong)。據專家介紹根據使(shi)用(yong)場(chang)合(he)不(bu)同(tong)，又可分(fen)為鑄錠(ding)(ding)(ding)保(bao)(bao)溫(wen)(wen)(wen)劑、鋼(gang)包(bao)(bao)與(yu)中(zhong)間罐覆蓋劑；有(you)(you)(you)粉狀(zhuang)(zhuang)(zhuang)、顆粒狀(zhuang)(zhuang)(zhuang)或板(ban)狀(zhuang)(zhuang)(zhuang)。鑄錠(ding)(ding)(ding)保(bao)(bao)溫(wen)(wen)(wen)劑有(you)(you)(you)時稱(cheng)為防縮(suo)孔(kong)劑，它的(de)作(zuo)用(yong)是(shi)延緩鋼(gang)錠(ding)(ding)(ding)糢內頭部(bu)鋼(gang)液凝(ning)固時間，改善鋼(gang)錠(ding)(ding)(ding)頭部(bu)縮(suo)孔(kong)形狀(zhuang)(zhuang)(zhuang)，有(you)(you)(you)利(li)于(yu)(yu)減少冒口體積，提(ti)(ti)(ti)高(gao)鋼(gang)錠(ding)(ding)(ding)成坯率。由(you)干延緩鋼(gang)錠(ding)(ding)(ding)頭部(bu)凝(ning)固時間，推(tui)遲(chi)了頭部(bu)結晶的(de)形成，特(te)別是(shi)使(shi)用(yong)發熱(re)(re)絕(jue)熱(re)(re)型(xing)(xing)(xing)(xing)保(bao)(bao)溫(wen)(wen)(wen)劑時，有(you)(you)(you)利(li)干減少鋼(gang)錠(ding)(ding)(ding)底部(bu)沉積錐(zhui)處的(de)偏析，從(cong)(cong)而提(ti)(ti)(ti)高(gao)鋼(gang)錠(ding)(ding)(ding)的(de)質(zhi)(zhi)量(liang)。下(xia)面河南耐(nai)(nai)(nai)火(huo)材(cai)(cai)料(liao)(liao)(liao)廠(chang)為大(da)家詳(xiang)解下(xia)保(bao)(bao)溫(wen)(wen)(wen)劑配方。絕(jue)熱(re)(re)型(xing)(xing)(xing)(xing)鑄錠(ding)(ding)(ding)保(bao)(bao)溫(wen)(wen)(wen)劑通常由(you)耐(nai)(nai)(nai)火(huo)骨(gu)料(liao)(liao)(liao)，碳(tan)質(zhi)(zhi)材(cai)(cai)料(liao)(liao)(liao)和(he)(he)添加一(yi)(yi)些多孔(kong)型(xing)(xing)(xing)(xing)物(wu)質(zhi)(zhi)組成（如纖維(wei)、碳(tan)化稻殼、膨脹石(shi)(shi)墨等）要(yao)(yao)(yao)求(qiu)在(zai)高(gao)溫(wen)(wen)(wen)條件下(xia)不(bu)燒結，維(wei)持粉體，且容(rong)重(zhong)小(xiao)，氣孔(kong)率高(gao)，從(cong)(cong)而具有(you)(you)(you)顯熱(re)(re)量(liang)小(xiao)，保(bao)(bao)溫(wen)(wen)(wen)性(xing)能好的(de)特(te)點(dian)。耐(nai)(nai)(nai)火(huo)骨(gu)料(liao)(liao)(liao)除(chu)要(yao)(yao)(yao)求(qiu)較高(gao)的(de)耐(nai)(nai)(nai)火(huo)度外，粒度大(da)小(xiao)是(shi)至關(guan)(guan)重(zhong)要(yao)(yao)(yao)的(de)，粒度愈(yu)小(xiao)，保(bao)(bao)溫(wen)(wen)(wen)性(xing)能愈(yu)好，其(qi)保(bao)(bao)溫(wen)(wen)(wen)性(xing)能與(yu)耐(nai)(nai)(nai)火(huo)骨(gu)料(liao)(liao)(liao)本(ben)身導(dao)熱(re)(re)系(xi)數(shu)幾乎(hu)關(guan)(guan)系(xi)不(bu)大(da)；碳(tan)質(zhi)(zhi)耐(nai)(nai)(nai)火(huo)材(cai)(cai)料(liao)(liao)(liao)高(gao)溫(wen)(wen)(wen)下(xia)導(dao)熱(re)(re)系(xi)數(shu)低(di)，有(you)(you)(you)強防輻射能力(li)（如片狀(zhuang)(zhuang)(zhuang)石(shi)(shi)墨〉和(he)(he)阻止耐(nai)(nai)(nai)火(huo)材(cai)(cai)料(liao)(liao)(liao)燒結傾向，是(shi)保(bao)(bao)溫(wen)(wen)(wen)劑中(zhong)不(bu)能缺少的(de)材(cai)(cai)料(liao)(liao)(liao)，加入少量(liang)多孔(kong)型(xing)(xing)(xing)(xing)的(de)物(wu)質(zhi)(zhi)可以降低(di)容(rong)重(zhong)，提(ti)(ti)(ti)高(gao)氣孔(kong)率，有(you)(you)(you)利(li)于(yu)(yu)減少保(bao)(bao)溫(wen)(wen)(wen)材(cai)(cai)料(liao)(liao)(liao)的(de)吸熱(re)(re)及提(ti)(ti)(ti)髙(gao)保(bao)(bao)溫(wen)(wen)(wen)性(xing)能。發生反應(ying)，放(fang)出大(da)量(liang)熱(re)(re)量(liang)，其(qi)升高(gao)溫(wen)(wen)(wen)度不(bu)僅取決于(yu)(yu)鋁含量(liang)的(de)高(gao)低(di)，粒度分(fen)布，還與(yu)反應(ying)速度及反應(ying)環境及的(de)保(bao)(bao)溫(wen)(wen)(wen)性(xing)能有(you)(you)(you)關(guan)(guan)。所以發熱(re)(re)型(xing)(xing)(xing)(xing)的(de)保(bao)(bao)溫(wen)(wen)(wen)劑必須(xu)包(bao)(bao)含有(you)(you)(you)良(liang)好絕(jue)熱(re)(re)牲能的(de)耐(nai)(nai)(nai)火(huo)骨(gu)料(liao)(liao)(liao)，除(chu)此之外，在(zai)使(shi)用(yong)時，要(yao)(yao)(yao)求(qiu)有(you)(you)(you)良(liang)好的(de)鋪展性(xing)，特(te)別對(dui)于(yu)(yu)扁錠(ding)(ding)(ding)尤為重(zhong)要(yao)(yao)(yao)。絕(jue)熱(re)(re)保(bao)(bao)溫(wen)(wen)(wen)型(xing)(xing)(xing)(xing)保(bao)(bao)溫(wen)(wen)(wen)劑，在(zai)鋼(gang)錠(ding)(ding)(ding)使(shi)用(yong)時，有(you)(you)(you)時為了操作(zuo)方便，把保(bao)(bao)護渣和(he)(he)保(bao)(bao)溫(wen)(wen)(wen)劑，合(he)而為一(yi)(yi)使(shi)用(yong)。