氫氧化鉀因?yàn)榫哂袕?qiáng)堿性及腐蝕性，因而在化工行業(yè)和其它一些行業(yè)中都有很重要的應(yīng)用，也可以作為很多類試劑應(yīng)用于不同的領(lǐng)域，比如干燥劑、吸收劑、耐火粘合劑等。那么，下面我們來看看它的耐火粘合劑的制備方法吧。
Because of its strong alkalinity and corrosivity, potassium hydroxide is widely used in chemical industry and other industries. It can also be used as a variety of reagents in different fields, such as desiccant, absorbent, refractory adhesive, etc. Well, let's take a look at the preparation method of its refractory adhesive.
1、耐火粘合劑的制備方法
1. Preparation of refractory adhesive
①耐火液制備方法：在反應(yīng)槽內(nèi)順序加入顆粒狀氫氧化鉀8kg、粉末狀碳酸鈉（蘇打灰）（旭硝子株式會(huì)社制）7kg和金屬硅化物30kg，再加入60l的水。在其中開始自然反應(yīng)，從下層的產(chǎn)品開始劇烈反應(yīng)，在反應(yīng)槽內(nèi)從下側(cè)向上側(cè)發(fā)生對流。反應(yīng)溫度自然上升，反應(yīng)溫度在80~90℃的范圍內(nèi)時(shí)，呈活躍的反應(yīng)狀態(tài)。反應(yīng)溫度高不超過92℃。反應(yīng)在10h左右結(jié)束，分離固體，可以獲得約48l（約70kg）耐火液。殘留的固體是金屬硅化物塊，如果用水洗凈，殘留約22kg左右的金屬硅化物塊。在這種殘存的金屬硅化物塊中，再補(bǔ)充加入約8kg左右的金屬硅化物塊，總和為30kg的金屬硅化物，供給到二次反應(yīng)中。與一次反應(yīng)相同，在反應(yīng)槽內(nèi)加入顆粒狀8kg，粉末狀碳酸鈉（蘇打灰）（旭硝子株式會(huì)社制）7kg，接著，依次加入一次反應(yīng)殘留的金屬硅化物塊22kg和新的金屬硅化物塊8kg，接著加入60l水，開始二次制備耐火液的反應(yīng)。在制備中，按照先加顆粒狀氫氧化鉀，再加入粉末狀碳酸鈉（蘇打灰），再加入金屬硅化物塊，然后加水的加料順序，由下層產(chǎn)品開始反應(yīng)，可形成上下對流式活躍反應(yīng)，由此制備的耐火液性能較好。
① Preparation method of refractory solution: in the reaction tank, 8 kg of granular potassium hydroxide, 7 kg of powdered sodium carbonate (soda ash) (made by Asahi nitrate Co., Ltd.) and 30kg of metal silicide are added in the reaction tank, and then 60L of water is added. In the reactor, the natural reaction begins, and the product in the lower layer reacts violently, and convection occurs from the lower side to the upper side in the reaction tank. The reaction temperature rises naturally. When the reaction temperature is in the range of 80 ~ 90 ℃, the reaction is active. The reaction temperature is not more than 92 ℃. About 48l (about 70kg) of refractory liquid can be obtained by separating the solid in about 10h. The residual solid is metal silicide block. If it is washed with water, about 22kg of metal silicide block will remain. In the remaining metal silicide block, about 8 kg of metal silicide block is added, and the total amount of metal silicide is 30 kg, which is supplied to the secondary reaction. In the same way as the first reaction, 8kg granular sodium carbonate and 7kg powdered sodium carbonate (soda ash) (made by Asahi nitrate Co., Ltd.) were added into the reaction tank. Then, 22kg residual metal silicide block and 8kg new metal silicide block were successively added into the reaction tank, and then 60L water was added to start the reaction of secondary preparation of refractory. In the process of preparation, granular potassium hydroxide is added first, then powdered sodium carbonate (soda ash), then metal silicide block is added, and then water is added. The reaction starts from the lower product to form the upper and lower convective active reaction. The performance of the prepared refractory is better.
②氫氧化鉀的耐火膠黏劑的制備：將耐火液、裁斷的舊報(bào)紙（其它舊紙也可用）、稻殼、棉分別加入反應(yīng)槽中，進(jìn)行充分?jǐn)嚢杈鶆蚣粗频媚突鸩牧稀?/div>
② Preparation of potassium hydroxide fire-resistant adhesive: the refractory liquid, cut old newspaper (other old paper can also be used), rice husk and cotton are respectively added into the reaction tank, and fully stirred to prepare the refractory.
2、這種耐火粘合劑性能若用耐火液涂覆木板，將涂覆的木板靠近1000~c火焰處30min不會(huì)發(fā)生燃燒。若將耐火膠黏劑混合物加壓脫水百分之四十五水分含量，在180℃下加壓1h制得輕質(zhì)耐火材料。將這種耐火材料靠近1500℃火焰觀察30min，10min后耐火材料表面發(fā)生陶瓷化，經(jīng)30min燃燒后，切開耐火材料，陶瓷化深度僅o.8mm，火未通人耐火材料內(nèi)部。此外，耐火材料隔音抗沖擊性能亦佳。其可切、鋸、釘釘子、釘螺釘?shù)燃庸ば阅芘c木材類同。
2. If the fire-resistant adhesive is used to coat the wood board, the coated board will not burn when it is close to the flame of 1000 ~ C for 30 min. If the refractory adhesive mixture is pressurized and dehydrated to 45% moisture content, the lightweight refractory is prepared by pressing at 180 ℃ for 1 h. The refractory was observed at 1500 ℃ for 30 min. after 10 min, the surface of the refractory was vitrified. After 30 min of combustion, the refractory was cut. The depth of the ceramic was only 0.8 mm, and the fire did not penetrate into the refractory. In addition, the sound insulation and impact resistance of refractories are also good. Its cutting, sawing, nailing, screw and other processing properties are similar to wood.
以上就是氫氧化鉀的耐火粘合劑的制備方法以及相關(guān)知識(shí)介紹，這類耐火粘合劑可代替?zhèn)鹘y(tǒng)的厚紙板、聚苯乙烯泡沫塑料和其它板材，用于制備冷質(zhì)框架、電視機(jī)殼、包裝材料和桌椅及廚房用具等，作用非常大。
The above is the preparation of potassium hydroxide refractory adhesive and related knowledge. This kind of fire-resistant adhesive can replace traditional thick cardboard, polystyrene foam plastics and other plates. It can be used to prepare cold frame, TV casing, packaging materials, tables and chairs, and kitchen utensils.
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