Preparation method of slow release type caking-preventing granular fertilizer

[0021] Example 1

[0022] Pour the mica rock into the ball mill tank, and add the zirconia ball mill beads according to the mass ratio of the balls to 20:1. After ball milling and mixing for 8 hours, pass through a 500 mesh sieve to obtain mica powder. Take 50 parts by weight in turn. Urea, 10 parts of mica powder, 12 parts of polyallylamine, 150 parts of organic solvent, first pour polyallylamine and organic solvent into a beaker, stir and mix with a stirrer at 500r/min for 40 minutes, then add granular urea and Mica powder, under agitation, inject carbon dioxide gas into the beaker at a rate of 40 mL/min, continue to infuse for 40 minutes, and filter to obtain pretreated granular urea; take 60 parts of chicken feathers and 50 parts of water in order by weight , 5 parts of sucrose, pour into the fermentation tank, at a temperature of 40 ℃, rotating speed 500r/min conditions, stirring and mixing at a constant temperature for 60 minutes, then add 6% chicken feather mass Bacillus licheniformis into the fermentation tank, constant temperature stirring fermentation 10 Day, the fermentation material is obtained, and the obtained fermentation material is transferred to an autoclave, and sterilized at a temperature of 121°C for 20 minutes to obtain a sterilized fermentation material, and then the obtained sterilized fermentation material is filtered to obtain a filtrate, and The obtained filtrate was transferred to a rotary evaporator, and under the conditions of a temperature of 70°C and a pressure of 800 kPa, the feather hydrolysate was obtained by rotary evaporation and concentration for 4 hours; then, by weight, 40 parts of phospholipids, 4 parts of chitosan, 15 Parts of mucin, 200 parts of water, ultrasonic dispersion for 60 minutes under the condition of an ultrasonic frequency of 55kHz, to obtain a dispersion; in parts by weight, take 30 parts of feather hydrolysate and 80 parts of dispersion in turn at a temperature of 50°C and a rotation speed Under the condition of 800r/min, stirring and mixing at constant temperature for 4 hours to obtain a film-forming liquid; in parts by weight, take 50 parts of film-forming liquid, 150 parts of pretreated urea particles, and pour the pretreated urea particles into the fluidized bed. The film-forming liquid is sprayed and coated on the surface of the pretreated urea particles after being atomized, and then freeze-dried in a vacuum and discharged to obtain a slow-release anti-caking granular fertilizer. The average particle size of the granular urea is 3 mm. The organic solvent is formed by mixing C8 alcohol and 1-methyl-2-pyrrolidone in a mass ratio of 1:3. The phospholipid is soybean lecithin. The mucin is porcine serum mucin.

[0023] Example 2

[0024] In parts by weight, take 50 parts of granular urea, 10 parts of limestone, 12 parts of polyallylamine, and 150 parts of organic solvent. Pour the polyallylamine and organic solvent into the beaker and stir with a stirrer at 500r/min. After mixing and dissolving for 40 minutes, add granular urea and limestone. Under stirring, pass carbon dioxide gas into the beaker at a rate of 40 mL/min. After continuing for 40 minutes, filter to obtain pretreated granular urea; in parts by weight, Take 60 parts of chicken feathers, 50 parts of water, and 5 parts of sucrose in turn, and pour them into the fermenter. At a temperature of 40°C and a speed of 500r/min, stir and mix at a constant temperature for 60 minutes, and then add 6% of chicken feathers to the fermenter. Bacillus licheniformis was fermented at constant temperature for 10 days to obtain the fermented material, and the obtained fermented material was transferred to an autoclave, and sterilized at a temperature of 121 ℃ for 20 minutes to obtain a sterilized fermented material, and then sterilized The fermented material is filtered to obtain the filtrate, and the obtained filtrate is transferred to a rotary evaporator. Under the conditions of a temperature of 70°C and a pressure of 800kPa, it is concentrated by rotary evaporation for 4 hours to obtain a feather hydrolysate; then take 40 parts by weight in sequence Phospholipids, 4 parts of chitosan, 15 parts of mucin, 200 parts of water, ultrasonic dispersion for 60 minutes under the condition of an ultrasonic frequency of 55kHz, to obtain a dispersion; in parts by weight, take 30 parts of feather hydrolysate and 80 parts of dispersion At a temperature of 50°C and a rotating speed of 800r/min, stir and mix for 4 hours at a constant temperature to obtain a film-forming liquid; in parts by weight, take 50 parts of the film-forming liquid and 150 parts of the pretreated urea particles in turn, The urea particles are poured into a fluidized bed, the film-forming liquid is atomized and sprayed and coated on the surface of the pretreated urea particles, and then vacuum freeze-dried and discharged to obtain a slow-release anti-caking granular fertilizer. The average particle size of the granular urea is 3 mm. The organic solvent is formed by mixing C8 alcohol and 1-methyl-2-pyrrolidone in a mass ratio of 1:3. The phospholipid is soybean lecithin. The mucin is porcine serum mucin.

[0025] Example 3

[0026] Pour the mica rock into the ball mill tank, and add the zirconia ball mill beads according to the mass ratio of the balls to 20:1. After ball milling and mixing for 8 hours, pass through a 500 mesh sieve to obtain mica powder. Take 50 parts by weight in turn. Urea, 10 parts of mica powder, 150 parts of organic solvent, first pour the organic solvent, granular urea and mica powder into the beaker, while stirring, pour carbon dioxide gas into the beaker at a rate of 40 mL/min, and continue to pour it for 40 minutes , Filtered to obtain pretreated granular urea; in parts by weight, take 60 parts chicken feathers, 50 parts water, 5 parts sucrose, and pour them into the fermentation tank at a temperature of 40°C and a rotation speed of 500r/min. After stirring and mixing for 60 minutes, add Bacillus licheniformis with 6% chicken feather mass to the fermenter, stir and ferment at constant temperature for 10 days to obtain fermented material, and transfer the obtained fermented material into an autoclave at 121°C. Sterilize for 20 minutes to obtain a sterilized fermentation material, and then filter the sterilized fermentation material to obtain a filtrate, and transfer the obtained filtrate to a rotary evaporator. Under the conditions of a temperature of 70°C and a pressure of 800 kPa, rotary evaporation is concentrated for 4 hours to obtain Feather hydrolysate; then, in parts by weight, take 40 parts of phospholipids, 4 parts of chitosan, 15 parts of mucin, 200 parts of water, and ultrasonically disperse for 60 minutes at an ultrasonic frequency of 55kHz to obtain a dispersion; According to the number of parts, take 30 parts of feather hydrolysate and 80 parts of dispersion liquid in turn, at a temperature of 50℃ and a rotating speed of 800r/min, stir and mix at a constant temperature for 4 hours to obtain a film-forming liquid; 1 part film-forming liquid, 150 parts pre-treated urea particles, pour the pre-treated urea particles into a fluidized bed, spray the film-forming liquid on the surface of the pre-treated urea particles after atomization, and then freeze-dry in vacuum and discharge. A slow-release anti-caking granular fertilizer is obtained. The average particle size of the granular urea is 3 mm. The organic solvent is formed by mixing C8 alcohol and 1-methyl-2-pyrrolidone in a mass ratio of 1:3. The phospholipid is soybean lecithin. The mucin is porcine serum mucin.