Preparation method of refractory and wear-resistant material applied to fluidized bed boiler
A fluidized bed boiler, refractory and wear-resistant technology, applied in the field of composite materials, can solve problems such as poor wear resistance, achieve good fire resistance and wear resistance, and improve wear resistance
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Embodiment 1
[0019] Step 1, prepare an aqueous solution containing 10wt% sodium molybdate, 12wt% sodium tungstate, and 5wt% disodium hydrogen phosphate, then raise the temperature to 95°C, and slowly add 90wt% concentrated sulfuric acid dropwise. 0.8 times the volume, heating to reflux, and then extracting with ether, removing ether from the ether extract under reduced pressure, washing the crude product with deionized water, and drying at room temperature to obtain a heteropolyacid;
[0020] In step 2, mix terephthalic acid, yttrium nitrate, cerium nitrate, and heteropolyacid evenly in a weight ratio of 1:8:4:3 to obtain a mixture, and then add N,N-dimethylformaldehyde 20 times the weight of the mixture After mixing evenly, the temperature was raised to 90°C for 15 hours. After the reaction, the solid was filtered out, washed with N,N-dimethylformamide, and dried under reduced pressure to obtain heteropolyacid-modified resistant Grinding particles;
[0021] In the third step, 40 parts of...
Embodiment 2
[0024] Step 1, prepare an aqueous solution containing 15wt% sodium molybdate, 18wt% sodium tungstate, and 8wt% disodium hydrogen phosphate, then raise the temperature to 100°C, and slowly add 98wt% concentrated sulfuric acid dropwise. 1.2 times the volume, heating to reflux, and then extracting with ether, removing ether from the ether extract under reduced pressure, washing the crude product with deionized water, and drying at room temperature to obtain a heteropolyacid;
[0025] Step 2: Mix terephthalic acid, yttrium nitrate, cerium nitrate, and heteropoly acid in a weight ratio of 1: 10: 6: 4 to obtain a mixture, and then add 35 times the weight of the mixture. Amide, after mixing evenly, raise the temperature to 110°C to react for 30 hours, filter out the solid after the reaction, wash the solid with N,N-dimethylformamide, and dry under reduced pressure to obtain heteropolyacid-modified resistant Grinding particles;
[0026] In the third step, 50 parts of corundum particl...
Embodiment 3
[0029] Step 1, prepare an aqueous solution containing 12wt% sodium molybdate, 15wt% sodium tungstate, and 6wt% disodium hydrogen phosphate, then raise the temperature to 98°C, and slowly add 95wt% concentrated sulfuric acid dropwise. 1.1 times the volume, heating to reflux, and then extracting with ether, removing ether from the ether extract under reduced pressure, washing the crude product with deionized water, and drying at room temperature to obtain a heteropolyacid;
[0030] In the second step, mix terephthalic acid, yttrium nitrate, cerium nitrate, and heteropolyacids in a weight ratio of 1:9:5:3 to obtain a mixture, and then add N,N-dimethylformaldehyde 25 times the weight of the mixture After mixing evenly, heat up to 95°C and react for 18 hours. After the reaction, the solid is filtered out, washed with N,N-dimethylformamide, and dried under reduced pressure to obtain heteropolyacid-modified resistant Grinding particles;
[0031] In the third step, 45 parts of corund...
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