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石灰窯中的石灰石到底是如何轉化為石灰的?

2023-08-29 14:43:38

石(shi)(shi)灰(hui)(hui)窯(yao)是一種用(yong)于將(jiang)石(shi)(shi)灰(hui)(hui)石(shi)(shi)轉化(hua)為石(shi)(shi)灰(hui)(hui)的設(she)備。石(shi)(shi)灰(hui)(hui)窯(yao)的工作原理是通過加熱(re)(re)石(shi)(shi)灰(hui)(hui)石(shi)(shi),將(jiang)其分(fen)解(jie)為石(shi)(shi)灰(hui)(hui)和二(er)氧化(hua)碳。具(ju)體來說,將(jiang)石(shi)(shi)灰(hui)(hui)石(shi)(shi)放入石(shi)(shi)灰(hui)(hui)窯(yao)中,然后加熱(re)(re)石(shi)(shi)灰(hui)(hui)石(shi)(shi),使(shi)其升溫至高溫狀(zhuang)態(tai),石(shi)(shi)灰(hui)(hui)石(shi)(shi)在高溫下發生(sheng)熱(re)(re)分(fen)解(jie)反應,產生(sheng)石(shi)(shi)灰(hui)(hui)和二(er)氧化(hua)碳。



石(shi)灰(hui)(hui)窯(yao)主要分為(wei)兩(liang)種(zhong)類型:立式(shi)石(shi)灰(hui)(hui)窯(yao)和(he)回轉(zhuan)石(shi)灰(hui)(hui)窯(yao)。立式(shi)石(shi)灰(hui)(hui)窯(yao)是較(jiao)為(wei)古老的一(yi)種(zhong)設計(ji),它(ta)由一(yi)個(ge)立式(shi)筒體組成,石(shi)灰(hui)(hui)石(shi)通過(guo)頂部(bu)(bu)進入(ru)(ru)石(shi)灰(hui)(hui)窯(yao),然后由底(di)部(bu)(bu)排出。回轉(zhuan)石(shi)灰(hui)(hui)窯(yao)是一(yi)種(zhong)現代(dai)化的設計(ji),它(ta)由一(yi)個(ge)傾斜(xie)的旋轉(zhuan)筒體組成,石(shi)灰(hui)(hui)石(shi)從頂部(bu)(bu)進入(ru)(ru)石(shi)灰(hui)(hui)窯(yao),并隨著筒體的旋轉(zhuan)逐漸下降,white_word$$748由底(di)部(bu)(bu)排出。在這(zhe)兩(liang)種(zhong)設計(ji)中,石(shi)灰(hui)(hui)石(shi)的轉(zhuan)化過(guo)程是相似的。


石(shi)(shi)(shi)灰(hui)(hui)(hui)窯中的(de)石(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)轉化為石(shi)(shi)(shi)灰(hui)(hui)(hui)的(de)過程主要分(fen)為三(san)個階(jie)(jie)段:石(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)的(de)干燥(zao)預熱階(jie)(jie)段,石(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)的(de)煅(duan)燒分(fen)解(jie)階(jie)(jie)段和石(shi)(shi)(shi)灰(hui)(hui)(hui)的(de)冷卻階(jie)(jie)段。


首先(xian)是(shi)石(shi)(shi)(shi)(shi)灰(hui)石(shi)(shi)(shi)(shi)的(de)干燥(zao)(zao)預熱(re)階段。當(dang)石(shi)(shi)(shi)(shi)灰(hui)石(shi)(shi)(shi)(shi)進入石(shi)(shi)(shi)(shi)灰(hui)窯(yao)時,它(ta)通常帶(dai)有水(shui)(shui)分(fen)。在石(shi)(shi)(shi)(shi)灰(hui)窯(yao)中,石(shi)(shi)(shi)(shi)灰(hui)石(shi)(shi)(shi)(shi)首先(xian)通過與窯(yao)壁(bi)內的(de)高溫爐氣接觸,石(shi)(shi)(shi)(shi)灰(hui)石(shi)(shi)(shi)(shi)表(biao)面(mian)的(de)水(shui)(shui)分(fen)開始蒸(zheng)發。這(zhe)個過程稱為干燥(zao)(zao)預熱(re)。干燥(zao)(zao)預熱(re)是(shi)一個比(bi)較慢的(de)過程,其目的(de)是(shi)將石(shi)(shi)(shi)(shi)灰(hui)石(shi)(shi)(shi)(shi)表(biao)面(mian)的(de)水(shui)(shui)蒸(zheng)發掉(diao),為之后的(de)石(shi)(shi)(shi)(shi)灰(hui)石(shi)(shi)(shi)(shi)煅(duan)燒分(fen)解階段做準備。


接(jie)下(xia)來是(shi)石(shi)(shi)灰(hui)(hui)石(shi)(shi)的(de)煅(duan)(duan)燒(shao)分(fen)(fen)(fen)解階段(duan)。在(zai)這個(ge)階段(duan),石(shi)(shi)灰(hui)(hui)窯的(de)溫(wen)(wen)度(du)會進一(yi)步升高,并且在(zai)高溫(wen)(wen)下(xia)維(wei)持一(yi)段(duan)時(shi)間(jian)。石(shi)(shi)灰(hui)(hui)石(shi)(shi)在(zai)高溫(wen)(wen)下(xia)分(fen)(fen)(fen)解為(wei)石(shi)(shi)灰(hui)(hui)和(he)二(er)氧化(hua)碳(tan)。這個(ge)分(fen)(fen)(fen)解反(fan)應稱為(wei)煅(duan)(duan)燒(shao)反(fan)應。煅(duan)(duan)燒(shao)反(fan)應的(de)化(hua)學方程式可以表(biao)示為(wei):CaCO3 → CaO + CO2。在(zai)這個(ge)反(fan)應中,石(shi)(shi)灰(hui)(hui)石(shi)(shi)(CaCO3)分(fen)(fen)(fen)解成石(shi)(shi)灰(hui)(hui)(CaO)和(he)二(er)氧化(hua)碳(tan)(CO2)。石(shi)(shi)灰(hui)(hui)通過(guo)石(shi)(shi)灰(hui)(hui)窯的(de)排(pai)氣(qi)口排(pai)出(chu),而二(er)氧化(hua)碳(tan)則通過(guo)石(shi)(shi)灰(hui)(hui)窯的(de)排(pai)氣(qi)系統排(pai)出(chu)。煅(duan)(duan)燒(shao)分(fen)(fen)(fen)解階段(duan)是(shi)整個(ge)過(guo)程中重要(yao)的(de)階段(duan),也是(shi)石(shi)(shi)灰(hui)(hui)窯內溫(wen)(wen)度(du)較高的(de)階段(duan)。


在(zai)分解完石(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)后(hou),石(shi)(shi)(shi)灰(hui)(hui)(hui)需(xu)要冷卻(que)(que)至(zhi)適宜的溫(wen)度(du),然后(hou)才能被使(shi)用(yong)或(huo)儲存。石(shi)(shi)(shi)灰(hui)(hui)(hui)窯中通(tong)常(chang)會有一(yi)個冷卻(que)(que)室(shi)(shi),用(yong)于(yu)將石(shi)(shi)(shi)灰(hui)(hui)(hui)的溫(wen)度(du)降低(di)。冷卻(que)(que)室(shi)(shi)內(nei)有一(yi)些冷卻(que)(que)裝(zhuang)置,如風扇(shan)或(huo)冷卻(que)(que)水,用(yong)來降低(di)石(shi)(shi)(shi)灰(hui)(hui)(hui)的溫(wen)度(du)。經(jing)過冷卻(que)(que)后(hou),石(shi)(shi)(shi)灰(hui)(hui)(hui)就(jiu)可以(yi)被用(yong)于(yu)不同的應用(yong)領域,如建(jian)筑材料、環境保護、冶金(jin)等。


總的(de)(de)來說,石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)窯(yao)中的(de)(de)石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)化(hua)為石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)的(de)(de)過(guo)程(cheng)是通過(guo)加(jia)熱石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)(shi)使(shi)其分解(jie)為石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)和(he)二氧化(hua)碳。這(zhe)(zhe)個(ge)過(guo)程(cheng)分為石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)(shi)的(de)(de)干燥預熱階段(duan)、石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)(shi)的(de)(de)煅燒分解(jie)階段(duan)和(he)石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)的(de)(de)冷卻階段(duan)。通過(guo)這(zhe)(zhe)樣的(de)(de)轉(zhuan)(zhuan)化(hua)過(guo)程(cheng),石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)石(shi)(shi)(shi)(shi)從(cong)礦石(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)化(hua)為能夠廣泛應用于各個(ge)領域的(de)(de)石(shi)(shi)(shi)(shi)灰(hui)(hui)(hui)。



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