一、耐火磚哪里有賣
耐火磚屬(shu)于建(jian)材,一般的建(jian)材市場都有(you)賣的,也(ye)可以(yi)(yi)(yi)去(qu)保溫耐火(huo)材料公司去(qu)看(kan)看(kan),定(ding)制也(ye)可以(yi)(yi)(yi)。如果是(shi)家(jia)用(yong)(yong)可以(yi)(yi)(yi)用(yong)(yong)紅磚代替(ti),畢竟耐火(huo)磚是(shi)工業(ye)上用(yong)(yong)的多,實在找不到可以(yi)(yi)(yi)網上購買。根(gen)據地(di)域的不同,一塊耐火(huo)磚大(da)概在4~5毛錢。
二、耐火磚怎么選擇
耐火磚有重質(zhi)(zhi)和輕(qing)質(zhi)(zhi)之(zhi)分,輕(qing)質(zhi)(zhi)有比重、材質(zhi)(zhi)之(zhi)分。重質(zhi)(zhi)有堿性、酸性、中(zhong)性之(zhi)分。那么,窯爐內襯(chen)怎么選用合適的(de)耐火磚呢(ni)?
1、首先(xian)要考慮材(cai)(cai)質(zhi),選擇(ze)什么材(cai)(cai)質(zhi)要看爐子的溫度(du)(du)、侵蝕程度(du)(du)和性質(zhi)。然后再看是輕(qing)(qing)質(zhi)和重質(zhi)的,如(ru)果是輕(qing)(qing)質(zhi)的,也要看溫度(du)(du)再選定(ding)用(yong)輕(qing)(qing)質(zhi)黏土(tu)磚(zhuan)(zhuan)或是輕(qing)(qing)質(zhi)高鋁(lv)磚(zhuan)(zhuan),溫度(du)(du)大于1300℃的保溫層,就(jiu)要選莫(mo)來石聚輕(qing)(qing)磚(zhuan)(zhuan)或是高鋁(lv)聚輕(qing)(qing)磚(zhuan)(zhuan)了,如(ru)果直接接觸(chu)火(huo)焰就(jiu)要選用(yong)剛玉莫(mo)來石聚輕(qing)(qing)磚(zhuan)(zhuan)或是氧化鋁(lv)空心球磚(zhuan)(zhuan)了。
2、如(ru)果(guo)是(shi)(shi)工作層,就要(yao)考慮重質耐火磚(zhuan)(zhuan),還(huan)是(shi)(shi)先看溫(wen)度,如(ru)果(guo)溫(wen)度在1000℃,不大(da)于(yu)1100℃,就選(xuan)(xuan)用黏土磚(zhuan)(zhuan),如(ru)果(guo)大(da)于(yu)1200℃,就要(yao)選(xuan)(xuan)擇高(gao)鋁(lv)(lv)磚(zhuan)(zhuan),當然溫(wen)度在1300-1350℃,要(yao)選(xuan)(xuan)擇一級高(gao)鋁(lv)(lv)磚(zhuan)(zhuan),1200℃選(xuan)(xuan)用二(er)級高(gao)鋁(lv)(lv)磚(zhuan)(zhuan),或是(shi)(shi)三級高(gao)鋁(lv)(lv)磚(zhuan)(zhuan)。1500℃以上就得用剛玉耐火磚(zhuan)(zhuan)了。
3、另外要考慮到窯爐(lu)內襯是酸性(xing)氣(qi)氛(fen)還是堿性(xing)氛(fen),酸性(xing)氣(qi)場(chang)就(jiu)要選(xuan)擇硅(gui)磚(zhuan)(zhuan)(zhuan)。如果玻璃窯池,那就(jiu)是鋯質澆(jiao)注耐火磚(zhuan)(zhuan)(zhuan)系列(lie)。如果是堿性(xing)氣(qi)氛(fen)要選(xuan)擇堿性(xing)耐火磚(zhuan)(zhuan)(zhuan),也就(jiu)是鎂質耐火磚(zhuan)(zhuan)(zhuan)系列(lie)。
4、還(huan)要考慮的(de)(de)(de)是(shi)設計的(de)(de)(de)耐(nai)(nai)(nai)火(huo)磚(zhuan)磚(zhuan)型(xing)(xing)尺(chi)寸(cun),要滿足筑(zhu)爐操(cao)(cao)作還(huan)必(bi)須考慮耐(nai)(nai)(nai)火(huo)磚(zhuan)的(de)(de)(de)生產方(fang)便,因(yin)為耐(nai)(nai)(nai)火(huo)磚(zhuan)在成(cheng)(cheng)型(xing)(xing)工序是(shi)否能機(ji)壓成(cheng)(cheng)型(xing)(xing)、耐(nai)(nai)(nai)火(huo)磚(zhuan)的(de)(de)(de)尺(chi)寸(cun)太(tai)長,不能機(ji)壓成(cheng)(cheng)型(xing)(xing),手(shou)工成(cheng)(cheng)型(xing)(xing)的(de)(de)(de)耐(nai)(nai)(nai)火(huo)磚(zhuan)強度低于機(ji)壓成(cheng)(cheng)型(xing)(xing)的(de)(de)(de)耐(nai)(nai)(nai)火(huo)磚(zhuan),強度低勢必(bi)影響耐(nai)(nai)(nai)火(huo)磚(zhuan)的(de)(de)(de)使用壽命。所以選擇耐(nai)(nai)(nai)火(huo)磚(zhuan)既要考慮方(fang)便筑(zhu)爐操(cao)(cao)作,又要方(fang)便耐(nai)(nai)(nai)火(huo)磚(zhuan)生產廠家(jia)制造。當然,設計最好用國家(jia)在標的(de)(de)(de)型(xing)(xing)號。
像鼓風爐(lu)爐(lu)身(shen)上部(bu)用(yong)(yong)(yong)黏土(tu)磚(zhuan)(zhuan)(zhuan)砌筑(zhu);中部(bu)用(yong)(yong)(yong)鎂(mei)磚(zhuan)(zhuan)(zhuan),鎂(mei)鉻(ge)(ge)磚(zhuan)(zhuan)(zhuan)或(huo)鎂(mei)鉻(ge)(ge)磚(zhuan)(zhuan)(zhuan)砌筑(zhu);爐(lu)身(shen)下部(bu)及風口區溫(wen)度為1300℃用(yong)(yong)(yong)高(gao)鋁磚(zhuan)(zhuan)(zhuan),單個部(bu)位在(zai)1500℃,運用(yong)(yong)(yong)條件(jian)嚴苛(ke)的選用(yong)(yong)(yong)細密黏土(tu)磚(zhuan)(zhuan)(zhuan),高(gao)鋁磚(zhuan)(zhuan)(zhuan)或(huo)鎂(mei)鉻(ge)(ge)磚(zhuan)(zhuan)(zhuan)。爐(lu)缸用(yong)(yong)(yong)鎂(mei)磚(zhuan)(zhuan)(zhuan),鎂(mei)鉻(ge)(ge)磚(zhuan)(zhuan)(zhuan)砌筑(zhu)。
鉛(qian)(qian)鋅(xin)(xin)密閉鼓風爐(lu),是處(chu)理(li)鉛(qian)(qian)鋅(xin)(xin)氧化礦或(huo)(huo)鉛(qian)(qian)鋅(xin)(xin)的(de)新爐(lu)型,是直(zhi)接(jie)(jie)鍛煉出(chu)產鉛(qian)(qian)和(he)鋅(xin)(xin),爐(lu)缸和(he)爐(lu)腰選用(yong)(yong)(yong)鎂(mei)鉻磚(zhuan)砌(qi)(qi)筑,爐(lu)頂及與(yu)鉛(qian)(qian)霧室銜(xian)接(jie)(jie)處(chu)用(yong)(yong)(yong)致密黏土磚(zhuan)砌(qi)(qi)筑,側墻(qiang)用(yong)(yong)(yong)黏土結合碳化硅磚(zhuan)砌(qi)(qi)筑。鉛(qian)(qian)鋅(xin)(xin)別離室的(de)底和(he)頂用(yong)(yong)(yong)致密黏土磚(zhuan)砌(qi)(qi)筑。鉛(qian)(qian)液流槽和(he)出(chu)鉛(qian)(qian)槽的(de)槽底,用(yong)(yong)(yong)二級高(gao)鋁(lv)耐(nai)火磚(zhuan)砌(qi)(qi)筑,槽壁用(yong)(yong)(yong)鎂(mei)鉻磚(zhuan)或(huo)(huo)鉻磚(zhuan)砌(qi)(qi)筑。
總之,選用耐火磚是(shi)根據不(bu)同(tong)爐(lu)型、不(bu)同(tong)溫度、不(bu)同(tong)侵蝕程度而選用的。