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西安鋼廠用保溫劑

西安鋼廠用保溫劑

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 保溫劑即覆蓋在鋼(gang)(gang)(gang)(gang)液面的一種絕(jue)(jue)熱(re)(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)材(cai)料(liao)(liao)(liao)。有(you)(you)絕(jue)(jue)熱(re)(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)型(xing)(xing)(xing)和發(fa)熱(re)(re)(re)(re)絕(jue)(jue)熱(re)(re)(re)(re)型(xing)(xing)(xing)兩種。據專家介(jie)紹根據使用(yong)(yong)場合(he)不(bu)同,又可(ke)分(fen)為(wei)鑄錠(ding)(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)、鋼(gang)(gang)(gang)(gang)包(bao)與(yu)(yu)中間(jian)罐覆蓋劑(ji)(ji);有(you)(you)粉(fen)狀、顆粒(li)狀或(huo)板狀。鑄錠(ding)(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)有(you)(you)時稱為(wei)防縮孔劑(ji)(ji),它的作(zuo)(zuo)用(yong)(yong)是(shi)延(yan)緩鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)糢內頭部鋼(gang)(gang)(gang)(gang)液凝固時間(jian),改善鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)頭部縮孔形狀,有(you)(you)利(li)于減(jian)少(shao)冒口體(ti)積,提(ti)(ti)(ti)高(gao)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)成(cheng)坯(pi)率(lv)。由干(gan)延(yan)緩鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)頭部凝固時間(jian),推遲了頭部結(jie)晶(jing)的形成(cheng),特(te)別是(shi)使用(yong)(yong)發(fa)熱(re)(re)(re)(re)絕(jue)(jue)熱(re)(re)(re)(re)型(xing)(xing)(xing)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)時,有(you)(you)利(li)干(gan)減(jian)少(shao)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)底(di)部沉(chen)積錐處(chu)的偏析,從而提(ti)(ti)(ti)高(gao)鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)的質(zhi)量(liang)。下面河南耐(nai)(nai)火(huo)(huo)材(cai)料(liao)(liao)(liao)廠為(wei)大(da)家詳解下保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)配方(fang)。絕(jue)(jue)熱(re)(re)(re)(re)型(xing)(xing)(xing)鑄錠(ding)(ding)(ding)(ding)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)通常由耐(nai)(nai)火(huo)(huo)骨(gu)料(liao)(liao)(liao),碳質(zhi)材(cai)料(liao)(liao)(liao)和添加一些多孔型(xing)(xing)(xing)物(wu)質(zhi)組成(cheng)(如纖維、碳化稻殼、膨(peng)脹石(shi)墨等)要(yao)求(qiu)在高(gao)溫(wen)(wen)(wen)條件下不(bu)燒(shao)結(jie),維持粉(fen)體(ti),且容(rong)重(zhong)小(xiao),氣孔率(lv)高(gao),從而具有(you)(you)顯(xian)熱(re)(re)(re)(re)量(liang)小(xiao),保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)能(neng)(neng)好(hao)(hao)的特(te)點。耐(nai)(nai)火(huo)(huo)骨(gu)料(liao)(liao)(liao)除要(yao)求(qiu)較高(gao)的耐(nai)(nai)火(huo)(huo)度外(wai),粒(li)度大(da)小(xiao)是(shi)至關(guan)重(zhong)要(yao)的,粒(li)度愈小(xiao),保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)能(neng)(neng)愈好(hao)(hao),其保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)能(neng)(neng)與(yu)(yu)耐(nai)(nai)火(huo)(huo)骨(gu)料(liao)(liao)(liao)本身導熱(re)(re)(re)(re)系(xi)數(shu)幾乎關(guan)系(xi)不(bu)大(da);碳質(zhi)耐(nai)(nai)火(huo)(huo)材(cai)料(liao)(liao)(liao)高(gao)溫(wen)(wen)(wen)下導熱(re)(re)(re)(re)系(xi)數(shu)低,有(you)(you)強(qiang)防輻射(she)能(neng)(neng)力(如片狀石(shi)墨〉和阻止耐(nai)(nai)火(huo)(huo)材(cai)料(liao)(liao)(liao)燒(shao)結(jie)傾向,是(shi)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)中不(bu)能(neng)(neng)缺少(shao)的材(cai)料(liao)(liao)(liao),加入(ru)少(shao)量(liang)多孔型(xing)(xing)(xing)的物(wu)質(zhi)可(ke)以(yi)降低容(rong)重(zhong),提(ti)(ti)(ti)高(gao)氣孔率(lv),有(you)(you)利(li)于減(jian)少(shao)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)材(cai)料(liao)(liao)(liao)的吸熱(re)(re)(re)(re)及提(ti)(ti)(ti)髙保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)能(neng)(neng)。發(fa)生反應(ying),放出大(da)量(liang)熱(re)(re)(re)(re)量(liang),其升高(gao)溫(wen)(wen)(wen)度不(bu)僅(jin)取決(jue)于鋁含量(liang)的高(gao)低,粒(li)度分(fen)布,還(huan)與(yu)(yu)反應(ying)速度及反應(ying)環境及的保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)性(xing)能(neng)(neng)有(you)(you)關(guan)。所以(yi)發(fa)熱(re)(re)(re)(re)型(xing)(xing)(xing)的保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji)必須包(bao)含有(you)(you)良好(hao)(hao)絕(jue)(jue)熱(re)(re)(re)(re)牲能(neng)(neng)的耐(nai)(nai)火(huo)(huo)骨(gu)料(liao)(liao)(liao),除此之外(wai),在使用(yong)(yong)時,要(yao)求(qiu)有(you)(you)良好(hao)(hao)的鋪展性(xing),特(te)別對于扁錠(ding)(ding)(ding)(ding)尤為(wei)重(zhong)要(yao)。絕(jue)(jue)熱(re)(re)(re)(re)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)型(xing)(xing)(xing)保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji),在鋼(gang)(gang)(gang)(gang)錠(ding)(ding)(ding)(ding)使用(yong)(yong)時,有(you)(you)時為(wei)了操(cao)作(zuo)(zuo)方(fang)便,把(ba)保(bao)(bao)(bao)(bao)護渣和保(bao)(bao)(bao)(bao)溫(wen)(wen)(wen)劑(ji)(ji),合(he)而為(wei)一使用(yong)(yong)。

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