Preparation for coating material containing phosphate fertilizer and coating method thereof
A technology of coating and phosphate fertilizer, which is applied in the field of preparation of slow-release phosphate-containing fertilizers, can solve problems such as difficult and complex processes, and achieve the effects of increased strength, low cost, and simple modification treatment methods
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example 1
[0023] Take 1000 grams of naturally differentiated attapulgite clay of about 200 mesh, add enough mass ratio of 2-3% sodium carbonate aqueous solution to soak and age for about 48 hours, then stir with a mechanical stirrer for 1-2 hours, filter and separate Take out the attapulgite, wash it with water for 2 to 3 times, then dry it and grind it finely. It is determined that the viscosity of the treated attapulgite is 15-20% higher than that of the non-modified one.
example 2
[0025] Take 1,000 grams of naturally differentiated attapulgite of about 200 meshes, add sufficient mass ratio of 6-10% phosphoric acid aqueous solution, soak for 2-4 hours, filter, wash with water for 2-3 times, and then dry it and finely ground. The treated attapulgite material is slow-release due to its structural characteristics. It is determined that the viscosity of the modified attapulgite is 11-18% higher than that of the non-modified one.
[0026] Preparation of Slow Release Phosphate Fertilizer
[0027] Sieve the diammonium phosphate with 8 mesh and wire mesh with a hole diameter of 3.50mm to remove coarse or fine particles, take 1000 grams of diammonium phosphate with a particle size of 2.50-3.50mm, and pour it into a drum coating machine. Adjust the inclination angle of the coating machine so that the diammonium phosphate rotates evenly in the drum in the form of a material curtain; adjust the angle of the airflow atomizer so that the axis of the nozzle is perpen...
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