Magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer and preparation method thereof

A technology of magnesium ammonium phosphate and slow-release fertilizer, applied in the field of comprehensive utilization of resources, can solve the problem of high production cost of wrapped slow/controlled-release fertilizer, low phosphorus content of magnesium ammonium phosphate slow-release fertilizer, uneven spraying of binder solution, etc. problem, to achieve the effect of reducing the cost of medicine, slowing the release effect, and slowing the release rate

Inactive Publication Date: 2018-08-17
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For ammonium magnesium phosphate slow-release fertilizer with low phosphorus content, high production cost of packaged slow/controlled release fertilizer, complicated production methods, risk of secondary pollution, uneven spraying ...

Method used

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  • Magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer and preparation method thereof
  • Magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer and preparation method thereof
  • Magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Raw materials: 1000g magnesium ammonium phosphate, 50g modified starch, 1000g phosphate fertilizer.

[0062] A preparation method of magnesium ammonium phosphate-phosphate slow-release fertilizer, comprising the following steps:

[0063] 1) Grind 1000g of magnesium ammonium phosphate and 50g of modified starch into small particles of about 1 μm, and mix well;

[0064] 2) Take 5% of the mixture in step 1), and place it in a disc granulator;

[0065] 3) Spray water on the rotating magnesium ammonium phosphate and modified starch granules by means of atomization;

[0066] 4) Slowly add 100 g (i.e. 10% of the total amount of phosphate fertilizer) phosphate fertilizer that is ground into small particles of about 1 μm in the magnesium ammonium phosphate and modified starch materials described in step 3);

[0067] 5) water spray granulation;

[0068] 6) After the material is converted into particles of about 1mm, repeat step 2) to step 5) in a slow adding manner, wherein th...

Embodiment 2

[0077] Raw materials: 2000g magnesium ammonium phosphate, 200g modified starch, 1000g phosphate fertilizer.

[0078] A preparation method of magnesium ammonium phosphate-phosphate slow-release fertilizer, comprising the following steps:

[0079] 1) Grind 2000g of magnesium ammonium phosphate and 200g of modified starch into small particles of 100 μm and 20 μm respectively, and mix well;

[0080] 2) Take 10% of the mixture in step 1), and place it in a disc granulator;

[0081] 3) Spray water on the rotating magnesium ammonium phosphate and modified starch granules by means of atomization;

[0082] 4) Slowly add 150 g (i.e. 15% of the total amount of phosphate fertilizer) of phosphate fertilizer that is ground into 100 μm small particles into the magnesium ammonium phosphate and modified starch materials described in step 3);

[0083] 5) water spray granulation;

[0084] 6) After the material is converted into particles of about 1 mm, repeat step 2) to step 5) in a slow addi...

Embodiment 3

[0092] Raw materials: 3000g magnesium ammonium phosphate, 240g modified starch, 1000g phosphate fertilizer.

[0093] A preparation method of magnesium ammonium phosphate-phosphate slow-release fertilizer, comprising the following steps:

[0094] 1) Grind 3000g of magnesium ammonium phosphate and 240g of modified starch into small particles of 200 μm and 50 μm respectively, and mix well;

[0095] 2) Take 8% of the mixture in step 1), and place it in a disc granulator;

[0096] 3) Spray water on the rotating magnesium ammonium phosphate and modified starch granules by means of atomization;

[0097] 4) Slowly add 140g (i.e. 14% of the total amount of phosphate fertilizer) phosphate fertilizer that is ground into 200 μm small particles in the magnesium ammonium phosphate and the modified starch material in step 3);

[0098] 5) water spray granulation;

[0099] 6) After the material is converted into particles of about 1 mm, repeat step 2) to step 5) in a slowly adding manner, w...

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Abstract

The invention belongs to the technical field of comprehensive utilization of resources and discloses a magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer and a preparation method thereof. The magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer is characterized in that magnesium ammonium phosphate obtained by high-ammonia-nitrogen or high-phosphate wastewater is used as a coating material, coating phosphorus pentoxide with a modified starch adhesive and granulating are performed to obtain the magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer, and magnesium ammonium phosphate particles and phosphorus fertilizer particles form the magnesium ammonium phosphate-phosphorus fertilizer slow-release fertilizer in a layer-by-layer coating form. By adoption of the magnesium ammonium phosphate slow-release fertilizer as the coating material, the release rate of the phosphorus fertilizer can be effectively controlled, phosphorus fertilizer controlled-release effects of the magnesium ammonium phosphate material are evident under different conditions, and nutrient elements are released gently. In addition, by introduction ofthe phosphorus fertilizer, the requirement of excessive phosphorus demands of part of plants can be met, and soil hardening is avoided.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of resources, in particular to the preparation of a magnesium ammonium phosphate-phosphate slow-release fertilizer and its nutrient element release law. Background technique [0002] According to reports, my country's phosphate fertilizer production and consumption have ranked first in the world. Phosphate fertilizers mainly include organic phosphorus and inorganic phosphorus, such as manure, bone meal, superphosphate, calcium magnesium phosphate fertilizer, etc. Phosphorus fertilizer can increase crop yield, improve crop quality, accelerate the tillering of cereal crops and promote grain fullness, promote the flowering and fruiting of cotton, melons, solanaceous vegetables and fruit trees, increase the rate of fruiting, increase the sugar content of beet, sugarcane, watermelon, etc., rapeseed Seed oil content, etc., and can make trees grow and develop well, and make new roots t...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G5/00
CPCC05B7/00C05G5/12C05G5/30C05B17/00
Inventor 余荣台马湘谢志鹏汪长安赵戈刘滢
Owner JINGDEZHEN CERAMIC INSTITUTE
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