保溫劑即(ji)覆(fu)蓋(gai)在鋼(gang)液面的(de)(de)(de)一種絕(jue)(jue)熱(re)(re)(re)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)材(cai)料。有(you)(you)(you)絕(jue)(jue)熱(re)(re)(re)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)型(xing)(xing)和發熱(re)(re)(re)絕(jue)(jue)熱(re)(re)(re)型(xing)(xing)兩種。據(ju)專家(jia)介紹(shao)根據(ju)使(shi)用(yong)場合(he)不(bu)同，又可分為鑄(zhu)錠(ding)(ding)(ding)(ding)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)、鋼(gang)包與中(zhong)間(jian)罐覆(fu)蓋(gai)劑(ji)；有(you)(you)(you)粉狀(zhuang)、顆(ke)粒狀(zhuang)或板狀(zhuang)。鑄(zhu)錠(ding)(ding)(ding)(ding)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)有(you)(you)(you)時(shi)(shi)稱為防(fang)縮(suo)(suo)孔劑(ji)，它的(de)(de)(de)作(zuo)(zuo)用(yong)是延緩鋼(gang)錠(ding)(ding)(ding)(ding)糢內頭部(bu)鋼(gang)液凝固(gu)時(shi)(shi)間(jian)，改(gai)善鋼(gang)錠(ding)(ding)(ding)(ding)頭部(bu)縮(suo)(suo)孔形狀(zhuang)，有(you)(you)(you)利于減少冒口體(ti)積，提(ti)高(gao)(gao)(gao)鋼(gang)錠(ding)(ding)(ding)(ding)成坯率。由干(gan)延緩鋼(gang)錠(ding)(ding)(ding)(ding)頭部(bu)凝固(gu)時(shi)(shi)間(jian)，推遲了頭部(bu)結晶的(de)(de)(de)形成，特別(bie)(bie)是使(shi)用(yong)發熱(re)(re)(re)絕(jue)(jue)熱(re)(re)(re)型(xing)(xing)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)時(shi)(shi)，有(you)(you)(you)利干(gan)減少鋼(gang)錠(ding)(ding)(ding)(ding)底部(bu)沉(chen)積錐處的(de)(de)(de)偏析(xi)，從而(er)提(ti)高(gao)(gao)(gao)鋼(gang)錠(ding)(ding)(ding)(ding)的(de)(de)(de)質(zhi)量(liang)(liang)。下面河南耐(nai)(nai)火材(cai)料廠為大(da)(da)家(jia)詳(xiang)解下保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)配方。絕(jue)(jue)熱(re)(re)(re)型(xing)(xing)鑄(zhu)錠(ding)(ding)(ding)(ding)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)通常由耐(nai)(nai)火骨料，碳(tan)質(zhi)材(cai)料和添加一些多孔型(xing)(xing)物質(zhi)組成（如纖維、碳(tan)化稻殼、膨脹石墨等）要(yao)求在高(gao)(gao)(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)條件下不(bu)燒(shao)結，維持粉體(ti)，且容重小(xiao)(xiao)，氣孔率高(gao)(gao)(gao)，從而(er)具有(you)(you)(you)顯熱(re)(re)(re)量(liang)(liang)小(xiao)(xiao)，保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能好(hao)的(de)(de)(de)特點。耐(nai)(nai)火骨料除要(yao)求較高(gao)(gao)(gao)的(de)(de)(de)耐(nai)(nai)火度外(wai)，粒度大(da)(da)小(xiao)(xiao)是至關(guan)(guan)重要(yao)的(de)(de)(de)，粒度愈(yu)(yu)小(xiao)(xiao)，保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能愈(yu)(yu)好(hao)，其(qi)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能與耐(nai)(nai)火骨料本身導熱(re)(re)(re)系(xi)數幾乎關(guan)(guan)系(xi)不(bu)大(da)(da)；碳(tan)質(zhi)耐(nai)(nai)火材(cai)料高(gao)(gao)(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)下導熱(re)(re)(re)系(xi)數低(di)，有(you)(you)(you)強防(fang)輻射能力（如片(pian)狀(zhuang)石墨〉和阻止耐(nai)(nai)火材(cai)料燒(shao)結傾向，是保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)中(zhong)不(bu)能缺少的(de)(de)(de)材(cai)料，加入少量(liang)(liang)多孔型(xing)(xing)的(de)(de)(de)物質(zhi)可以降低(di)容重，提(ti)高(gao)(gao)(gao)氣孔率，有(you)(you)(you)利于減少保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)材(cai)料的(de)(de)(de)吸(xi)熱(re)(re)(re)及提(ti)髙保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能。發生反應(ying)，放出大(da)(da)量(liang)(liang)熱(re)(re)(re)量(liang)(liang)，其(qi)升高(gao)(gao)(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)度不(bu)僅取決于鋁含量(liang)(liang)的(de)(de)(de)高(gao)(gao)(gao)低(di)，粒度分布，還與反應(ying)速度及反應(ying)環境及的(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)性(xing)(xing)能有(you)(you)(you)關(guan)(guan)。所以發熱(re)(re)(re)型(xing)(xing)的(de)(de)(de)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)必須(xu)包含有(you)(you)(you)良(liang)好(hao)絕(jue)(jue)熱(re)(re)(re)牲能的(de)(de)(de)耐(nai)(nai)火骨料，除此之(zhi)外(wai)，在使(shi)用(yong)時(shi)(shi)，要(yao)求有(you)(you)(you)良(liang)好(hao)的(de)(de)(de)鋪展(zhan)性(xing)(xing)，特別(bie)(bie)對(dui)于扁錠(ding)(ding)(ding)(ding)尤為重要(yao)。絕(jue)(jue)熱(re)(re)(re)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)型(xing)(xing)保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)，在鋼(gang)錠(ding)(ding)(ding)(ding)使(shi)用(yong)時(shi)(shi)，有(you)(you)(you)時(shi)(shi)為了操作(zuo)(zuo)方便，把保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)護渣和保(bao)(bao)(bao)(bao)(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)劑(ji)，合(he)而(er)為一使(shi)用(yong)。