一、耐火磚哪里有賣
耐火磚屬于建材,一(yi)(yi)般的(de)建材市場(chang)都有賣的(de),也(ye)可(ke)以去(qu)保溫耐(nai)火材料公司去(qu)看(kan)看(kan),定制(zhi)也(ye)可(ke)以。如果是家(jia)用(yong)可(ke)以用(yong)紅(hong)磚代替,畢竟耐(nai)火磚是工(gong)業上(shang)用(yong)的(de)多(duo),實在找不到可(ke)以網上(shang)購買。根據地(di)域的(de)不同,一(yi)(yi)塊(kuai)耐(nai)火磚大概在4~5毛(mao)錢。
二、耐火磚怎么選擇
耐(nai)火(huo)磚有重質(zhi)和輕質(zhi)之(zhi)分(fen)(fen),輕質(zhi)有比重、材(cai)質(zhi)之(zhi)分(fen)(fen)。重質(zhi)有堿性(xing)、酸性(xing)、中性(xing)之(zhi)分(fen)(fen)。那么(me)(me),窯爐內襯怎么(me)(me)選用合適的耐(nai)火(huo)磚呢?
1、首先要考慮(lv)材(cai)質,選(xuan)(xuan)擇(ze)什么材(cai)質要看(kan)爐子的溫度(du)、侵蝕程(cheng)度(du)和性質。然后再看(kan)是(shi)輕(qing)質和重質的,如果是(shi)輕(qing)質的,也(ye)要看(kan)溫度(du)再選(xuan)(xuan)定用輕(qing)質黏土(tu)磚(zhuan)或是(shi)輕(qing)質高鋁(lv)磚(zhuan),溫度(du)大于(yu)1300℃的保溫層,就要選(xuan)(xuan)莫(mo)來(lai)石聚輕(qing)磚(zhuan)或是(shi)高鋁(lv)聚輕(qing)磚(zhuan)了(le),如果直接接觸火焰就要選(xuan)(xuan)用剛(gang)玉莫(mo)來(lai)石聚輕(qing)磚(zhuan)或是(shi)氧(yang)化(hua)鋁(lv)空心球磚(zhuan)了(le)。
2、如果(guo)是工作(zuo)層,就要(yao)考慮重(zhong)質耐火(huo)磚(zhuan)(zhuan)(zhuan)(zhuan),還(huan)是先看溫(wen)度(du),如果(guo)溫(wen)度(du)在1000℃,不大于(yu)1100℃,就選(xuan)用(yong)(yong)黏土磚(zhuan)(zhuan)(zhuan)(zhuan),如果(guo)大于(yu)1200℃,就要(yao)選(xuan)擇高(gao)(gao)鋁磚(zhuan)(zhuan)(zhuan)(zhuan),當然溫(wen)度(du)在1300-1350℃,要(yao)選(xuan)擇一(yi)級高(gao)(gao)鋁磚(zhuan)(zhuan)(zhuan)(zhuan),1200℃選(xuan)用(yong)(yong)二級高(gao)(gao)鋁磚(zhuan)(zhuan)(zhuan)(zhuan),或是三級高(gao)(gao)鋁磚(zhuan)(zhuan)(zhuan)(zhuan)。1500℃以上(shang)就得用(yong)(yong)剛玉(yu)耐火(huo)磚(zhuan)(zhuan)(zhuan)(zhuan)了。
3、另外要考慮到窯(yao)(yao)爐(lu)內襯是(shi)酸(suan)性(xing)氣氛還(huan)是(shi)堿(jian)性(xing)氛,酸(suan)性(xing)氣場就要選(xuan)(xuan)擇(ze)硅磚。如果玻璃窯(yao)(yao)池,那就是(shi)鋯質澆注(zhu)耐火磚系(xi)列。如果是(shi)堿(jian)性(xing)氣氛要選(xuan)(xuan)擇(ze)堿(jian)性(xing)耐火磚,也就是(shi)鎂質耐火磚系(xi)列。
4、還(huan)要(yao)考(kao)慮(lv)的(de)(de)(de)是(shi)設計的(de)(de)(de)耐火(huo)磚(zhuan)(zhuan)(zhuan)磚(zhuan)(zhuan)(zhuan)型(xing)(xing)尺(chi)寸(cun),要(yao)滿足筑(zhu)爐(lu)操(cao)作(zuo)還(huan)必(bi)須(xu)考(kao)慮(lv)耐火(huo)磚(zhuan)(zhuan)(zhuan)的(de)(de)(de)生(sheng)產(chan)方便,因為耐火(huo)磚(zhuan)(zhuan)(zhuan)在(zai)成(cheng)(cheng)型(xing)(xing)工序是(shi)否能(neng)機壓(ya)成(cheng)(cheng)型(xing)(xing)、耐火(huo)磚(zhuan)(zhuan)(zhuan)的(de)(de)(de)尺(chi)寸(cun)太長,不能(neng)機壓(ya)成(cheng)(cheng)型(xing)(xing),手工成(cheng)(cheng)型(xing)(xing)的(de)(de)(de)耐火(huo)磚(zhuan)(zhuan)(zhuan)強(qiang)度低(di)于機壓(ya)成(cheng)(cheng)型(xing)(xing)的(de)(de)(de)耐火(huo)磚(zhuan)(zhuan)(zhuan),強(qiang)度低(di)勢必(bi)影響耐火(huo)磚(zhuan)(zhuan)(zhuan)的(de)(de)(de)使用壽命。所以選(xuan)擇耐火(huo)磚(zhuan)(zhuan)(zhuan)既要(yao)考(kao)慮(lv)方便筑(zhu)爐(lu)操(cao)作(zuo),又(you)要(yao)方便耐火(huo)磚(zhuan)(zhuan)(zhuan)生(sheng)產(chan)廠(chang)家制造。當然,設計最好用國(guo)家在(zai)標的(de)(de)(de)型(xing)(xing)號(hao)。
像鼓(gu)風爐爐身(shen)上部(bu)用(yong)黏(nian)土(tu)磚(zhuan)(zhuan)砌(qi)筑;中(zhong)部(bu)用(yong)鎂(mei)(mei)(mei)(mei)磚(zhuan)(zhuan),鎂(mei)(mei)(mei)(mei)鉻磚(zhuan)(zhuan)或鎂(mei)(mei)(mei)(mei)鉻磚(zhuan)(zhuan)砌(qi)筑;爐身(shen)下部(bu)及風口區溫(wen)度為1300℃用(yong)高鋁磚(zhuan)(zhuan),單個部(bu)位在1500℃,運(yun)用(yong)條(tiao)件嚴苛的選(xuan)用(yong)細密黏(nian)土(tu)磚(zhuan)(zhuan),高鋁磚(zhuan)(zhuan)或鎂(mei)(mei)(mei)(mei)鉻磚(zhuan)(zhuan)。爐缸用(yong)鎂(mei)(mei)(mei)(mei)磚(zhuan)(zhuan),鎂(mei)(mei)(mei)(mei)鉻磚(zhuan)(zhuan)砌(qi)筑。
鉛(qian)(qian)(qian)鋅(xin)(xin)密閉鼓風爐,是處理鉛(qian)(qian)(qian)鋅(xin)(xin)氧化礦或鉛(qian)(qian)(qian)鋅(xin)(xin)的新(xin)爐型,是直接(jie)鍛煉(lian)出產鉛(qian)(qian)(qian)和(he)鋅(xin)(xin),爐缸(gang)和(he)爐腰選(xuan)用(yong)(yong)鎂鉻磚(zhuan)(zhuan)(zhuan)砌(qi)(qi)筑(zhu)(zhu)(zhu),爐頂及(ji)與鉛(qian)(qian)(qian)霧室銜接(jie)處用(yong)(yong)致密黏土(tu)磚(zhuan)(zhuan)(zhuan)砌(qi)(qi)筑(zhu)(zhu)(zhu),側(ce)墻用(yong)(yong)黏土(tu)結合碳化硅磚(zhuan)(zhuan)(zhuan)砌(qi)(qi)筑(zhu)(zhu)(zhu)。鉛(qian)(qian)(qian)鋅(xin)(xin)別離室的底和(he)頂用(yong)(yong)致密黏土(tu)磚(zhuan)(zhuan)(zhuan)砌(qi)(qi)筑(zhu)(zhu)(zhu)。鉛(qian)(qian)(qian)液流槽和(he)出鉛(qian)(qian)(qian)槽的槽底,用(yong)(yong)二級高鋁耐火磚(zhuan)(zhuan)(zhuan)砌(qi)(qi)筑(zhu)(zhu)(zhu),槽壁用(yong)(yong)鎂鉻磚(zhuan)(zhuan)(zhuan)或鉻磚(zhuan)(zhuan)(zhuan)砌(qi)(qi)筑(zhu)(zhu)(zhu)。
總之,選用耐火磚是根據不同爐型、不同溫度、不同侵(qin)蝕(shi)程度而選用的。