很多小伙伴不太清楚四川速凝劑有哪些主要成(cheng)分,今天(tian)成(cheng)都中道弘建材就帶(dai)大家一起來了解下!
四川速凝(ning)劑主要成分為鋁氧熟(shu)料(即鋁礬土、純堿、生石灰按比例(li)燒制成的熟(shu)料)經磨細而制成。
1、鋁礬土
礬土(tu)或鋁(lv)土(tu)礦,主(zhu)要成分是(shi)氧(yang)(yang)(yang)化(hua)鋁(lv),系含有(you)雜質的(de)水合氧(yang)(yang)(yang)化(hua)鋁(lv),是(shi)一種土(tu)狀礦物。白色(se)或灰白色(se),因含鐵而呈褐黃或淺紅色(se)。密度3.9~4g/cm3,硬度1~3,不透明(ming),質脆。極難熔化(hua)。不溶于水,能(neng)溶于硫酸、氫氧(yang)(yang)(yang)化(hua)鈉溶液。主(zhu)要用于煉鋁(lv),制(zhi)耐火(huo)材(cai)料。
2、碳(tan)酸鈉
碳(tan)(tan)酸鈉常溫下為白色(se)粉末或顆粒。無氣味。有(you)堿(jian)(jian)性。是(shi)堿(jian)(jian)性的鹽。有(you)吸(xi)水(shui)性。露置(zhi)空氣中逐漸吸(xi)收 1mol/L水(shui)分(fen)(約(yue)15%)。400℃時開始失去二氧(yang)化碳(tan)(tan)。遇(yu)酸分(fen)解并泡(pao)騰。溶(rong)于水(shui)(室溫時3.5份,35℃時2.2份)和甘油,不溶(rong)于乙醇。水(shui)溶(rong)液(ye)呈(cheng)強(qiang)堿(jian)(jian)性,pH11.6。相對密度2.53。熔(rong)點851℃。116.6mg。有(you)刺激性。可由氫氧(yang)化鈉和碳(tan)(tan)酸發生化學(xue)反應結合而成。溶(rong)液(ye)呈(cheng)堿(jian)(jian)性。
碳酸鈉是(shi)重要的化(hua)工(gong)(gong)(gong)(gong)原(yuan)料之一,廣泛應用于輕(qing)工(gong)(gong)(gong)(gong)日化(hua)、建(jian)材、化(hua)學工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、食品工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、冶(ye)金(jin)、紡織、石油、國(guo)防、醫藥(yao)等領域, 用作(zuo)制造其他化(hua)學品的原(yuan)料、清洗劑、洗滌(di)劑,也(ye)用于照相術和(he)分(fen)析(xi)領域。絕大部分(fen)用于工(gong)(gong)(gong)(gong)業(ye)(ye)(ye),一小部分(fen)為民用。在工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)用純堿中(zhong),主要是(shi)輕(qing)工(gong)(gong)(gong)(gong)、建(jian)材、化(hua)學工(gong)(gong)(gong)(gong)業(ye)(ye)(ye),約占2/3;其次是(shi)冶(ye)金(jin)、紡織、石油、國(guo)防、醫藥(yao)及(ji)其它工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)。玻璃工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)是(shi)純堿的較(jiao)大消費部門,每噸玻璃消耗純堿0.2噸。
3、生石灰
外形(xing)為白(bai)色(或(huo)灰色、棕白(bai)),無(wu)定形(xing),在空(kong)氣中吸收水和二氧(yang)化(hua)碳(tan)。氧(yang)化(hua)鈣(gai)與水作用生成氫氧(yang)化(hua)鈣(gai),并放出熱量。溶(rong)于(yu)酸水,不溶(rong)于(yu)醇。系屬無(wu)機堿性蝕物品(pin),國(guo)家危規編號95006。
生石(shi)(shi)(shi)灰(hui)是采用化(hua)(hua)學吸(xi)收法除去(qu)水蒸氣的(de)常用干燥劑,也(ye)用于鋼鐵、農藥、醫藥、干燥劑、制革及(ji)醇的(de)脫水等。生石(shi)(shi)(shi)灰(hui)中一般都含有過(guo)火(huo)石(shi)(shi)(shi)灰(hui),過(guo)火(huo)石(shi)(shi)(shi)灰(hui)熟(shu)化(hua)(hua)慢(man),若在石(shi)(shi)(shi)灰(hui)漿體(ti)硬化(hua)(hua)后再(zai)發(fa)生熟(shu)化(hua)(hua),會因熟(shu)化(hua)(hua)產(chan)生的(de)膨脹而(er)引起(qi)隆起(qi)和(he)開裂。為了消除過(guo)火(huo)石(shi)(shi)(shi)灰(hui)的(de)這種危害,石(shi)(shi)(shi)灰(hui)在熟(shu)化(hua)(hua)后,還(huan)應“陳(chen)伏”2周左右。
生石灰與水會發(fa)生化學(xue)反應,接(jie)著就會立(li)刻加熱(re)到超(chao)越300℃的高溫。
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