Because of its strong alkalinity and corrosiveness, potassium hydroxide has a very important application in chemical industry and other industries. It can also be used as a reagent in many different fields, such as desiccant, adsorbent, fire-resistant adhesive, etc. So, let's look at the preparation of refractory binder.
1. Preparation method of refractory adhesive
Preparation method of refractories: add 8kg of granular potassium hydroxide, 7kg of powdered sodium carbonate (soda ash) (produced by xUnit subsidiary company) and 30kg of metal silicide into the reaction tank, and then add 60L of water. The natural reaction starts, the violent reaction starts from the bottom of the product, and convection occurs from the bottom 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 in an active state. The reaction temperature shall not exceed 92 ℃. The reaction was completed in about 10 hours, and about 48l (about 70kg) of refractory liquid was obtained by separating the solid. The other solids are metal silicides. If washed with water, about 22 kg of metal silicide remains. In the remaining metal silicides, add about 8kg of metal silicides, a total of 30kg of metal silicides for secondary reaction. As in the first stage reaction, add 8kg of granular sodium carbonate (soda ash) (subsidiary of Asahi), 7kg of powdered sodium carbonate (subsidiary of Asahi), and then add 22kg of residual metal silicides and 8kg of new metal silicides in the first stage reaction. In the preparation process, first add granular potassium hydroxide, then add powdered sodium carbonate (soda ash), then add metal silicide block, and then add water according to the feeding sequence. Starting from the lower product, the reaction can form an active reaction with opposite flow from top to bottom, and a fire resistant liquid with good performance can be prepared.
(2) preparation of potassium hydroxide fire-resistant adhesive: add the fire-resistant liquid, old newspaper (other old paper can also be used), rice husk and cotton into the reaction tank, mix them well and make them into fire-resistant materials.
2. If the fire-resistant coating wood is used for the performance of the fire-resistant adhesive, the coated wood will not burn for 30 minutes at the place close to 1000 ~ C flame. The lightweight refractories can be made by pressing and dehydrating the refractories to 45% moisture content and pressing at 180 ℃ for 1H. The refractories were observed for 30 minutes in a flame close to 1500 ℃. After 10 minutes, the surface of refractory was treated with ceramic. After burning for 30min, cut the refractory. In addition, the sound insulation and impact resistance of refractories are also very good. It can cut, saw, nail, screw and other wood with similar processing performance.
The above is the preparation of potassium hydroxide fire retardant and related knowledge introduction. This kind of fireproof adhesive can replace traditional thick plate, polystyrene foam plastics and other plates, and is used to prepare the cold qualitative framework. Under the condition of TV sets, the packaging materials and tables and chairs and kitchen utensils are very influential.