Manufacturing method of coated fertilizer

Abstract

The invention discloses a manufacturing method of a coated fertilizer. The manufacturing method comprises the following steps of 1 material mixing, wherein urea, nitrate, phosphate, plant ash, potassium chloride, animal oil and fat, lysine, glycerin, a coalescing agent and modified starch are stirred to be uniform and then added into a heating reaction kettle; 2 heating and pressurizing, wherein after the heating temperature of the reaction kettle is controlled at 200 DEG C to 300 DEG C and the pressure is increased by 1.6 MPa, heat preservation and pressure maintaining are conducted for 15-20 minutes, and molten slurry is obtained for use; 3 coated fertilizer preparing, wherein a mold is used, the molten slurry is injected into the mold, water cooling and demolding are conducted, and then the coated fertilizer is obtained, wherein the diameter of the coated fertilizer is 5-8 cm, the mold is formed by integrally connecting a plurality of spherical structures, and the outer surface of the mold flows through a cooling water curtain; 4 coating preparing, wherein the outer surfaces of the spherical particles obtained in the step 3 are coated with sulfur obtained after melting to form sulfur films with the thickness of 2-3 mm; 5 packaging, wherein the coated fertilizer obtained in the step 4 is coated with a degradation film, and bagging and packaging are conducted. The manufacturing method is simple, and the manufactured product is simple in proportion, long in fertilizer effect and convenient and rapid to apply.

Description

[0001] Technical field:

[0002] The invention relates to the technical field of fertilizers, in particular to a method for manufacturing coated fertilizers.

[0003] Background technique:

[0004] In today's agricultural production, it is usually necessary to use fertilizers to increase agricultural production. During the fertilization process, it is necessary to use a spreader or fertilization equipment to spread the fertilizer after furrowing. Traditional fertilizers are all in the shape of fine particles, usually spherical particles with a size of 3-5mm. However, the traditional fertilizer particles are too small, especially when fertilizing by hand, it is difficult to control the amount, so fertilization is time-consuming and laborious. The fertilizer with too small particles has a small slow release degree and short fertilizer effect time. For this reason, need to occur a kind of manufacturing method simple, the product proportioning of making is simple, and fertilizer...

Examples

Embodiment Construction

[0023] Example 1,

[0024] Coated fertilizer, wherein, comprises the following components configured according to parts by weight:

[0025] 80 parts of urea, 40 parts of nitrate, 30 parts of phosphate, 20 parts of plant ash, 30 parts of potassium chloride, 20 parts of animal fat, 10 parts of lysine, 1-2 parts of glycerin, 1-2 parts of film-forming aids, 5-10 parts of modified starch.

[0026] Manufacturing method:

[0027] A. Steps of mixing materials: Stir urea, nitrate, phosphate, plant ash, potassium chloride, animal fat and lysine evenly, and then add them into the heating reaction kettle.

[0028] B. Steps of heating and pressurizing: control the heating temperature of the reactor to be 200-300 degrees Celsius, pressurize 1.6 pressures at the same time, and keep the pressure for 15-20 minutes to obtain the molten slurry for later use;

[0029] C. The step of preparing coated fertilizer: using a mould, pouring molten slurry into the mould, forming coated fertilizer afte...

[0001] Technical field:

[0002] The invention relates to the technical field of fertilizers, in particular to a method for manufacturing coated fertilizers.

[0003] Background technique:

[0004] In today's agricultural production, it is usually necessary to use fertilizers to increase agricultural production. During the fertilization process, it is necessary to use a spreader or fertilization equipment to spread the fertilizer after furrowing. Traditional fertilizers are all in the shape of fine particles, usually spherical particles with a size of 3-5mm. However, the traditional fertilizer particles are too small, especially when fertilizing by hand, it is difficult to control the amount, so fertilization is time-consuming and laborious. The fertilizer with too small particles has a small slow release degree and short fertilizer effect time. For this reason, need to occur a kind of manufacturing method simple, the product proportioning of making is simple, and fertilizer...

Examples

Embodiment Construction

[0023] Example 1,

[0024] Coated fertilizer, wherein, comprises the following components configured according to parts by weight:

[0025] 80 parts of urea, 40 parts of nitrate, 30 parts of phosphate, 20 parts of plant ash, 30 parts of potassium chloride, 20 parts of animal fat, 10 parts of lysine, 1-2 parts of glycerin, 1-2 parts of film-forming aids, 5-10 parts of modified starch.

[0026] Manufacturing method:

[0027] A. Steps of mixing materials: Stir urea, nitrate, phosphate, plant ash, potassium chloride, animal fat and lysine evenly, and then add them into the heating reaction kettle.

[0028] B. Steps of heating and pressurizing: control the heating temperature of the reactor to be 200-300 degrees Celsius, pressurize 1.6 pressures at the same time, and keep the pressure for 15-20 minutes to obtain the molten slurry for later use;

[0029] C. The step of preparing coated fertilizer: using a mould, pouring molten slurry into the mould, forming coated fertilizer afte...