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Method for producing multilayer nutrient fertilizer

A production method and fertilizer technology, applied in the direction of inorganic fertilizers, ammonium nitrate fertilizers, fertilizer mixtures, etc., can solve the problems of nitrogen, phosphorus and potassium nutrients cannot be released, environmental pollution, nitrogen fertilizer utilization rate is only 35%, to ensure growth and improve utilization rate effect

Inactive Publication Date: 2008-05-28
天津市中天化肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When applied, the nitrogen, phosphorus and potassium nutrients in the granules cannot be released according to the different needs of the crops for nutrients in different growth periods, and a large amount of fertilizer nutrients cannot be rationally and effectively used, resulting in low fertilizer nutrient utilization.
In particular, the utilization rate of nitrogen fertilizer is only 35%, which not only fails to achieve the effect of increasing production, but also causes pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a. The first stage (innermost layer) coating: mix and stir the raw materials ammonium sulfate, monoammonium phosphate, potassium sulfate, and free water in a weight ratio of 10:45:25:1 to form a mixture, and add it according to 30% of the weight of the obtained mixture Water, prepared as an aqueous solution, added to the granulator, atomized by compressed air, granulated under hot air drying at 200°C, and coated into small fertilizer granules.

[0017] b. Second-stage coating: Put the fertilizer particles obtained in the first stage into the granulator, keep the particles in a boiling state under the action of cold wind, heat the sulfur to 115°C, and atomize and spray the sulfur from the high-pressure nozzle of the granulator And coated on the fertilizer granules to form a sulfur coating.

[0018] c. The third stage coating: put the fertilizer particles obtained in the second stage into the granulator, keep the particles in a boiling state under the action of cold wind,...

Embodiment 2

[0022] a. The first level (innermost layer) coating: mix and stir the raw materials ammonium sulfate, monoammonium phosphate, potassium sulfate, and free water in a weight ratio of 17:54:27:2 to form a mixture, and add it according to 30% of the weight of the obtained mixture Water, prepared as an aqueous solution, added to the granulator, atomized by compressed air, granulated under hot air drying at 200°C, and coated into small fertilizer granules.

[0023] b. Second-stage coating: Put the fertilizer particles obtained in the first stage into the granulator, keep the particles in a boiling state under the action of cold wind, heat the sulfur to 115°C, and atomize and spray the sulfur from the high-pressure nozzle of the granulator And coated on the fertilizer granules to form a sulfur coating.

[0024] c. The third stage coating: put the fertilizer particles obtained in the second stage into the granulator, keep the particles in a boiling state under the action of cold wind,...

Embodiment 3

[0028] a. The first stage (innermost layer) coating: mix and stir the raw materials ammonium sulfate, monoammonium phosphate, potassium sulfate, and free water in a weight ratio of 20:60:20:1 to form a mixture, and add it according to 30% of the weight of the obtained mixture Water, prepared as an aqueous solution, added to the granulator, atomized by compressed air, granulated under hot air drying at 200°C, and coated into small fertilizer granules.

[0029] b. Second-stage coating: Put the fertilizer particles obtained in the first stage into the granulator, keep the particles in a boiling state under the action of cold wind, heat the sulfur to 115°C, and atomize and spray the sulfur from the high-pressure nozzle of the granulator And coated on the fertilizer granules to form a sulfur coating.

[0030] c. The third stage coating: put the fertilizer particles obtained in the second stage into the granulator, keep the particles in a boiling state under the action of cold wind,...

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Abstract

The invention discloses a production method of multilayer nutrient fertilizer, relating to a production method of a fertilizer which can promote the growth of crops. A multi-stage coating method is adopted on the surface of master batch. Urea, monoammonium phosphate, potassium chloride, potassium sulfate, ammonium chloride and ammonium sulfate are taken as main raw materials and are coated on the surface of the master batch after being compounded by different proportions, thus leading each layer of the master batch to be the multilayer nutrient fertilizer with different nutrients. The invention can be dissolved and released gradually according to nutrition needed by crops in different periods, so the invention provides different nutritionts for the crops in different growth periods, thus guaranteeing the growth of the crops and effectively improving the utilization ratio of the fertilizer as well.

Description

Technical field [0001] The invention relates to agricultural planting, in particular to a method for producing fertilizers that can promote the growth of crops. Background technique [0002] During the growth of crops, chemical fertilizers are needed to promote their growth. At present, the granules of ordinary compound fertilizer products have a uniform nutrient content ratio from the inside to the outside. When applied, the nitrogen, phosphorus and potassium nutrients in the granules cannot be released according to the different needs of the crops for nutrients in different growth stages, and a large amount of fertilizer nutrients cannot be used reasonably and effectively, resulting in low fertilizer nutrient utilization. In particular, the utilization rate of nitrogen fertilizer is only 35%, which not only fails to achieve the effect of increasing production, but also causes pollution to the environment. In order to completely change this situation, it is necessary to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05C1/00C05C9/00C05D1/02C05B7/00
Inventor 杨永祥杨振宁李全成陈松李国兵
Owner 天津市中天化肥有限公司