Preparation method of anti-caking water-soluble fertilizer

Abstract

The invention belongs to the technical field of fertilizer production and in particular relates to a preparation method of anti-caking water-soluble fertilizer. A specific technical scheme is as follows: the preparation method of the anti-caking water-soluble fertilizer comprises the specific steps: uniformly mixing components including a water-soluble fertilizer dehydration agent, water-soluble fertilizer containing crystallized water and the like; absorbing away free water on the surface of the water-soluble fertilizer containing the crystallized water obtained by centrifuging by utilizing the water-soluble fertilizer dehydration agent, so as to enable an obtained product to form a flowing sand shape. The water-soluble fertilizer product prepared by the method has the advantages of highfertilizer effect, no insoluble components and good long-period storage stability.

Description

technical field

[0001] The invention belongs to the technical field of fertilizer manufacture, and in particular relates to a preparation method of an anti-caking water-soluble fertilizer. Background technique

[0002] Compound fertilizers account for an increasing proportion of fertilizer production and consumption. Compound fertilizers are prone to moisture absorption and caking during production, storage and transportation, which directly affects their normal use and fertilizer efficiency. How to solve the caking problem of compound fertilizers has been a research hotspot in the fertilizer industry at home and abroad for many years. Common inorganic anti-caking and fillers such as diatomite, bentonite sodium, bentonite calcium, kaolin, zeolite, etc. are often used. These fillers are coated on the surface of fertilizer particles and use their physical isolation to prevent agglomeration. The amount of use is relatively large. It will cause dust and cause environmental poll...

Examples

Embodiment 1

[0022] A preparation method of anti-caking water-soluble fertilizer, comprising the following steps:

[0023] Step 1. Place one or the mixture of magnesium sulfate tetrahydrate and magnesium sulfate hexahydrate containing crystal water in the trough, and use a microwave generator with a frequency of 2.45GHz for microwave dehydration. The temperature of the microwave dehydration in the trough is controlled At 100°C, the microwave dehydration time is controlled at 10 minutes to obtain anhydrous magnesium sulfate. The dehydrated anhydrous magnesium sulfate is cooled and pulverized. The particle size of the anhydrous magnesium sulfate powder is 0.5 mm.

[0024] Step 2, centrifuge the magnesium sulfate hexahydrate product from the magnesium sulfate aqueous solution, add the anhydrous magnesium sulfate powder obtained in step 1 to magnesium sulfate hexahydrate and mix evenly, the anhydrous magnesium sulfate powder and magnesium sulfate hexahydrate The mass ratio is 2%, and the anhyd...

Embodiment 2

[0026] A preparation method of anti-caking water-soluble fertilizer, comprising the following steps:

[0027] Step 1. Place one or the mixture of magnesium sulfate tetrahydrate and magnesium sulfate hexahydrate containing crystal water in the trough, and use a microwave generator with a frequency of 2.45GHz for microwave dehydration. The temperature of the microwave dehydration in the trough is controlled At 150°C, the microwave dehydration time is controlled at 5 minutes to obtain anhydrous magnesium sulfate. The dehydrated anhydrous magnesium sulfate is cooled and pulverized. The particle size of the anhydrous magnesium sulfate powder is 0.4mm.

[0028] Step 2, centrifuge the magnesium sulfate hexahydrate product from the magnesium sulfate aqueous solution, add the anhydrous magnesium sulfate powder obtained in step 1 to magnesium sulfate hexahydrate and mix evenly, the anhydrous magnesium sulfate powder and magnesium sulfate hexahydrate The mass ratio is 20%, and the anhydr...

Embodiment 3

[0030] A preparation method of anti-caking water-soluble fertilizer, comprising the following steps:

[0031]Step 1. Place one or the mixture of magnesium sulfate tetrahydrate and magnesium sulfate hexahydrate containing crystal water in the trough, and use a microwave generator with a frequency of 2.45GHz for microwave dehydration. The temperature of the microwave dehydration in the trough is controlled At 130°C, the microwave dehydration time is controlled at 8 minutes to obtain anhydrous magnesium sulfate. The dehydrated anhydrous magnesium sulfate is cooled and pulverized. The particle size of the anhydrous magnesium sulfate powder is 0.3mm.

[0032] Step 2, centrifugally separate the magnesium sulfate hexahydrate product from the magnesium sulfate aqueous solution, add the anhydrous magnesium sulfate powder obtained in the step 1 into magnesium sulfate hexahydrate and mix evenly, the mixture of the anhydrous magnesium sulfate powder and magnesium sulfate hexahydrate The m...

technical field

[0001] The invention belongs to the technical field of fertilizer manufacture, and in particular relates to a preparation method of an anti-caking water-soluble fertilizer. Background technique

[0002] Compound fertilizers account for an increasing proportion of fertilizer production and consumption. Compound fertilizers are prone to moisture absorption and caking during production, storage and transportation, which directly affects their normal use and fertilizer efficiency. How to solve the caking problem of compound fertilizers has been a research hotspot in the fertilizer industry at home and abroad for many years. Common inorganic anti-caking and fillers such as diatomite, bentonite sodium, bentonite calcium, kaolin, zeolite, etc. are often used. These fillers are coated on the surface of fertilizer particles and use their physical isolation to prevent agglomeration. The amount of use is relatively large. It will cause dust and cause environmental poll...

Examples

Embodiment 1

[0022] A preparation method of anti-caking water-soluble fertilizer, comprising the following steps:

[0023] Step 1. Place one or the mixture of magnesium sulfate tetrahydrate and magnesium sulfate hexahydrate containing crystal water in the trough, and use a microwave generator with a frequency of 2.45GHz for microwave dehydration. The temperature of the microwave dehydration in the trough is controlled At 100°C, the microwave dehydration time is controlled at 10 minutes to obtain anhydrous magnesium sulfate. The dehydrated anhydrous magnesium sulfate is cooled and pulverized. The particle size of the anhydrous magnesium sulfate powder is 0.5 mm.

[0024] Step 2, centrifuge the magnesium sulfate hexahydrate product from the magnesium sulfate aqueous solution, add the anhydrous magnesium sulfate powder obtained in step 1 to magnesium sulfate hexahydrate and mix evenly, the anhydrous magnesium sulfate powder and magnesium sulfate hexahydrate The mass ratio is 2%, and the anhyd...

Embodiment 2

[0026] A preparation method of anti-caking water-soluble fertilizer, comprising the following steps:

[0027] Step 1. Place one or the mixture of magnesium sulfate tetrahydrate and magnesium sulfate hexahydrate containing crystal water in the trough, and use a microwave generator with a frequency of 2.45GHz for microwave dehydration. The temperature of the microwave dehydration in the trough is controlled At 150°C, the microwave dehydration time is controlled at 5 minutes to obtain anhydrous magnesium sulfate. The dehydrated anhydrous magnesium sulfate is cooled and pulverized. The particle size of the anhydrous magnesium sulfate powder is 0.4mm.

[0028] Step 2, centrifuge the magnesium sulfate hexahydrate product from the magnesium sulfate aqueous solution, add the anhydrous magnesium sulfate powder obtained in step 1 to magnesium sulfate hexahydrate and mix evenly, the anhydrous magnesium sulfate powder and magnesium sulfate hexahydrate The mass ratio is 20%, and the anhydr...

Embodiment 3

[0030] A preparation method of anti-caking water-soluble fertilizer, comprising the following steps:

[0031]Step 1. Place one or the mixture of magnesium sulfate tetrahydrate and magnesium sulfate hexahydrate containing crystal water in the trough, and use a microwave generator with a frequency of 2.45GHz for microwave dehydration. The temperature of the microwave dehydration in the trough is controlled At 130°C, the microwave dehydration time is controlled at 8 minutes to obtain anhydrous magnesium sulfate. The dehydrated anhydrous magnesium sulfate is cooled and pulverized. The particle size of the anhydrous magnesium sulfate powder is 0.3mm.

[0032] Step 2, centrifugally separate the magnesium sulfate hexahydrate product from the magnesium sulfate aqueous solution, add the anhydrous magnesium sulfate powder obtained in the step 1 into magnesium sulfate hexahydrate and mix evenly, the mixture of the anhydrous magnesium sulfate powder and magnesium sulfate hexahydrate The m...