A kind of sludge additive for solidification and preparation method thereof
A technology of additives and sludge, applied in the field of solidification sludge additives and its preparation
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[0024] The preparation method of described solidifying sludge additive, comprises the following steps:
[0025] S1: Mix sodium polyacrylate, potassium polyacrylate, No. 325 cement, No. 425 cement, blast furnace slag powder, fly ash, sodium aluminate, and gypsum evenly, stir at 1500-2500r / min for 10-30min, and cool to room temperature get base material;
[0026] S2: Heat polycarboxybutyrate and molding modifier to 60-70°C, keep warm for 20-40min, then add organic rectorite and nano-calcium carbonate and mix evenly, stir at 850-1050r / min for 1-2h, Then continue to heat up to 80-90°C, keep warm for 5-15min, then add 1,3-butanediol and mix evenly, stir at 2500-3500r / min for 5-15min, cool to room temperature to obtain the modified material;
[0027] S3: Heat the base material obtained in S1 to 110-130°C, keep it warm for 20-30min, then add the modified material obtained in S2, cool it down to 70-80°C, keep it warm for 1-2h, and stir at 650-850r / min for 1 -2h, cooled to room tempe...
Embodiment 1
[0029] A sludge additive for solidification, in parts by weight, comprising the following raw materials: 1.4 parts of sodium polyacrylate, 1.5 parts of potassium polyacrylate, 35 parts of No. 325 cement, 34.6 parts of No. 425 cement, 66.7 parts of blast furnace slag powder, fly ash 64.8 parts, 1.7 parts of sodium aluminate, 4.8 parts of gypsum, 4.6 parts of organic rectorite, 3.5 parts of nano calcium carbonate, 19.7 parts of polycarboxybutyrate, 25.6 parts of molding modification additives, 2.7 parts of 1,3-butanediol share.
[0030] The molding modification auxiliary agent is prepared according to the following process: by weight, 18.3 parts of chitosan solution with a concentration of 2.3 mol / L are added into 11.6 parts of 0.9% acetic acid solution at a speed of 789 r / min. Stir for 32 minutes, adjust the pH to 12.3, precipitate, filter, and then add 5.8 parts of N,N-dicyclohexylcarbodiimide, 4.1 parts of polyvinylpyrrolidone, 3.2 parts of lignin sulfonate and 5.6 parts of d...
Embodiment 2
[0036] A sludge additive for solidification, in parts by weight, comprising the following raw materials: 1 part of sodium polyacrylate, 2 parts of potassium polyacrylate, 30 parts of No. 325 cement, 40 parts of No. 425 cement, 60 parts of blast furnace slag powder, fly ash 70 parts, 1.5 parts of sodium aluminate, 6 parts of gypsum, 3 parts of organic rectorite, 5 parts of nano-calcium carbonate, 12 parts of polycarboxybutyrate, 30 parts of molding modifier, 1,3-butanediol share.
[0037] The molding modification auxiliary agent is prepared according to the following process: adding 15 parts by weight of a chitosan solution with a substance concentration of 3.5mol / L to 8 parts of a mass fraction of 1.5% acetic acid solution at a speed of 650r / min Stir for 40 minutes, adjust the pH to 11, precipitate, filter, then add 8 parts of N,N-dicyclohexylcarbodiimide, 2 parts of polyvinylpyrrolidone, 5 parts of lignin sulfonate and 4 parts of distilled water to the filter cake and mix wel...
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