A preparation method of refractory 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] The first step is to prepare an aqueous solution containing 10wt% sodium molybdate, 12wt% sodium tungstate, and 5wt% disodium hydrogen phosphate, then the temperature is raised to 95°C, and 90wt% concentrated sulfuric acid is slowly added dropwise. The volume of concentrated sulfuric acid added is the aqueous solution 0.8 times the volume, heated to reflux, and extracted with ether. After the ether extract was removed under reduced pressure, the crude product was washed with deionized water, and dried at room temperature to obtain a heteropolyacid;
[0020] In the second step, terephthalic acid, yttrium nitrate, cerium nitrate, and heteropolyacid are mixed uniformly according to the weight ratio of 1:8:4:3 to obtain a mixture, and then N,N-dimethylformaldehyde 20 times the weight of the mixture is added. amide, after mixing uniformly, the temperature was raised to 90 °C and reacted for 15 h. After the reaction, the solid was filtered out, washed with N,N-dimethylformamid...
Embodiment 2
[0024] The first step is to prepare an aqueous solution containing 15wt% sodium molybdate, 18wt% sodium tungstate and 8wt% disodium hydrogen phosphate, then heat up to 100°C, and slowly add 98wt% concentrated sulfuric acid dropwise. The volume of concentrated sulfuric acid added is the aqueous solution 1.2 times the volume, heated to reflux, and extracted with ether. After the ether extract was removed under reduced pressure, the crude product was washed with deionized water, and dried at room temperature to obtain a heteropolyacid;
[0025] The 2nd step, terephthalic acid, yttrium nitrate, cerium nitrate, heteropolyacid are uniformly mixed according to weight ratio 1: 10: 6: 4, obtain mixture, then add 35 times of N,N-dimethylformaldehyde of mixture weight amide, after mixing evenly, the temperature was raised to 110 °C and reacted for 30 h. After the reaction, the solid was filtered out, washed with N,N-dimethylformamide, and dried under reduced pressure to obtain a heteropol...
Embodiment 3
[0029] The first step is to prepare an aqueous solution containing 12wt% sodium molybdate, 15wt% sodium tungstate, and 6wt% disodium hydrogen phosphate, then the temperature is raised to 98°C, and then 95wt% concentrated sulfuric acid is slowly added dropwise. The added volume of concentrated sulfuric acid is the aqueous solution 1.1 times the volume, heated to reflux, and extracted with ether. After the ether extract was removed under reduced pressure, the crude product was washed with deionized water, and dried at room temperature to obtain a heteropolyacid;
[0030] In the second step, terephthalic acid, yttrium nitrate, cerium nitrate, and heteropolyacid are mixed uniformly according to the weight ratio of 1:9:5:3 to obtain a mixture, and then N,N-dimethylformaldehyde 25 times the weight of the mixture is added. amide, after mixing evenly, the temperature was raised to 95 °C for 18 h. After the reaction, the solid was filtered out, washed with N,N-dimethylformamide, and dri...
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