Ceramic fiber blanket manufacturer ceramic fiber blanket production method
Method for producing precipitated aluminum silicate (P820) Precipitated aluminum silicate is made of aluminum sulfate and sodium silicate. After the reaction, the precipitate is formed into a precipitated aluminum silicate slurry, which is aged, filtered, dried and air-jet pulverized to obtain a finished product.
The iron-free aluminum sulfate and sodium silicate are used as raw materials to prepare a solution of a certain concentration; the two liquid materials are respectively fed into the reaction tank with stirring and pre-added water and a certain additive at a certain flow rate, using steam Indirect heating, keeping the reaction temperature constant, by adjusting the flow rate of the raw material liquid, the system is maintained at a certain pH value for reaction, and then aging, filtering, washing, drying, and jet milling to obtain a qualified precipitated aluminum silicate product.
Ceramic fiber blanket industrial building materials furnace, heating device, high temperature pipeline wall lining Power boiler, gas turbine and nuclear power insulation.
High-temperature reaction equipment and heating equipment in the chemical industry wall-lined microsphere ceramic fiber blanket gel: First, sodium silicate and sulfuric acid react to form silicic acid, silicic acid is very unstable, and soon aggregates into particles to become sol, sol gel Become a hydrogel.
Na2O·mSiO2 + H2SO4 = Na2SO4 + mSiO2 + H2O where m is the modulus and is generally between 3,0 and 3,3.
After the formation of the silicon hydrogel, an aluminum sulfate solution is added and then neutralized with ammonia to form an aluminum hydroxide gel: AL2(SO4)3+6NH4OH = 3(NH4)2SO4+2 AL(OH)4.