保溫劑即覆(fu)蓋在(zai)鋼(gang)(gang)(gang)(gang)(gang)(gang)液面(mian)(mian)的(de)(de)(de)(de)一(yi)種(zhong)絕(jue)(jue)(jue)熱(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)材(cai)料(liao)(liao)。有(you)(you)絕(jue)(jue)(jue)熱(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)型(xing)(xing)(xing)和發(fa)熱(re)(re)(re)絕(jue)(jue)(jue)熱(re)(re)(re)型(xing)(xing)(xing)兩(liang)種(zhong)。據(ju)專家(jia)介紹根據(ju)使用(yong)(yong)場合(he)不同，又可分為鑄(zhu)(zhu)錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)、鋼(gang)(gang)(gang)(gang)(gang)(gang)包與中間罐覆(fu)蓋劑(ji)；有(you)(you)粉狀(zhuang)(zhuang)、顆粒(li)狀(zhuang)(zhuang)或板狀(zhuang)(zhuang)。鑄(zhu)(zhu)錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)有(you)(you)時(shi)稱為防縮孔劑(ji)，它的(de)(de)(de)(de)作用(yong)(yong)是(shi)(shi)延(yan)緩(huan)鋼(gang)(gang)(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)糢內頭部(bu)鋼(gang)(gang)(gang)(gang)(gang)(gang)液凝固時(shi)間，改善鋼(gang)(gang)(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)頭部(bu)縮孔形狀(zhuang)(zhuang)，有(you)(you)利(li)于(yu)減(jian)少(shao)冒(mao)口體積(ji)，提(ti)高(gao)鋼(gang)(gang)(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)成坯率。由干延(yan)緩(huan)鋼(gang)(gang)(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)頭部(bu)凝固時(shi)間，推遲了(le)頭部(bu)結(jie)晶(jing)的(de)(de)(de)(de)形成，特別是(shi)(shi)使用(yong)(yong)發(fa)熱(re)(re)(re)絕(jue)(jue)(jue)熱(re)(re)(re)型(xing)(xing)(xing)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)時(shi)，有(you)(you)利(li)干減(jian)少(shao)鋼(gang)(gang)(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)底部(bu)沉積(ji)錐處的(de)(de)(de)(de)偏析，從而提(ti)高(gao)鋼(gang)(gang)(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)的(de)(de)(de)(de)質(zhi)量(liang)(liang)。下(xia)面(mian)(mian)河南耐火(huo)材(cai)料(liao)(liao)廠為大家(jia)詳(xiang)解下(xia)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)配方。絕(jue)(jue)(jue)熱(re)(re)(re)型(xing)(xing)(xing)鑄(zhu)(zhu)錠(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)通常(chang)由耐火(huo)骨料(liao)(liao)，碳(tan)質(zhi)材(cai)料(liao)(liao)和添(tian)加(jia)一(yi)些多孔型(xing)(xing)(xing)物質(zhi)組成（如纖維、碳(tan)化稻殼、膨脹石(shi)墨等）要(yao)求在(zai)高(gao)溫(wen)(wen)(wen)(wen)條件下(xia)不燒結(jie)，維持粉體，且容(rong)重小(xiao)(xiao)，氣孔率高(gao)，從而具有(you)(you)顯熱(re)(re)(re)量(liang)(liang)小(xiao)(xiao)，保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)(neng)好(hao)(hao)的(de)(de)(de)(de)特點。耐火(huo)骨料(liao)(liao)除要(yao)求較高(gao)的(de)(de)(de)(de)耐火(huo)度(du)外，粒(li)度(du)大小(xiao)(xiao)是(shi)(shi)至關重要(yao)的(de)(de)(de)(de)，粒(li)度(du)愈小(xiao)(xiao)，保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)(neng)愈好(hao)(hao)，其(qi)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)(neng)與耐火(huo)骨料(liao)(liao)本(ben)身導(dao)熱(re)(re)(re)系(xi)(xi)數(shu)幾乎關系(xi)(xi)不大；碳(tan)質(zhi)耐火(huo)材(cai)料(liao)(liao)高(gao)溫(wen)(wen)(wen)(wen)下(xia)導(dao)熱(re)(re)(re)系(xi)(xi)數(shu)低(di)(di)，有(you)(you)強防輻(fu)射能(neng)(neng)力（如片狀(zhuang)(zhuang)石(shi)墨〉和阻止耐火(huo)材(cai)料(liao)(liao)燒結(jie)傾向，是(shi)(shi)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)中不能(neng)(neng)缺少(shao)的(de)(de)(de)(de)材(cai)料(liao)(liao)，加(jia)入少(shao)量(liang)(liang)多孔型(xing)(xing)(xing)的(de)(de)(de)(de)物質(zhi)可以降低(di)(di)容(rong)重，提(ti)高(gao)氣孔率，有(you)(you)利(li)于(yu)減(jian)少(shao)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)材(cai)料(liao)(liao)的(de)(de)(de)(de)吸熱(re)(re)(re)及提(ti)髙(gao)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)(neng)。發(fa)生反應，放出大量(liang)(liang)熱(re)(re)(re)量(liang)(liang)，其(qi)升高(gao)溫(wen)(wen)(wen)(wen)度(du)不僅取決(jue)于(yu)鋁(lv)含量(liang)(liang)的(de)(de)(de)(de)高(gao)低(di)(di)，粒(li)度(du)分布，還與反應速度(du)及反應環境及的(de)(de)(de)(de)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)性(xing)(xing)能(neng)(neng)有(you)(you)關。所以發(fa)熱(re)(re)(re)型(xing)(xing)(xing)的(de)(de)(de)(de)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)必須包含有(you)(you)良(liang)好(hao)(hao)絕(jue)(jue)(jue)熱(re)(re)(re)牲(sheng)能(neng)(neng)的(de)(de)(de)(de)耐火(huo)骨料(liao)(liao)，除此之外，在(zai)使用(yong)(yong)時(shi)，要(yao)求有(you)(you)良(liang)好(hao)(hao)的(de)(de)(de)(de)鋪(pu)展性(xing)(xing)，特別對(dui)于(yu)扁錠(ding)(ding)(ding)尤(you)為重要(yao)。絕(jue)(jue)(jue)熱(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)型(xing)(xing)(xing)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)，在(zai)鋼(gang)(gang)(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)使用(yong)(yong)時(shi)，有(you)(you)時(shi)為了(le)操作方便，把保(bao)(bao)(bao)(bao)護渣和保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)劑(ji)，合(he)而為一(yi)使用(yong)(yong)。