Production method of spraying sulfoacid resin type sustained and controlled-release fertilizer

A slow-controlled release chemical fertilizer and a manufacturing method technology, applied in fertilizer forms, fertilization devices, fertilizer mixtures, etc., can solve problems such as secondary soil pollution, and achieve the effects of simple production process, solving secondary soil pollution, and low production costs.

Inactive Publication Date: 2012-04-18
河北凯龙肥料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned defects, and provide a method for manufacturing a spray-coated sulfur resin type slow-controlled fertilizer with simple process, low production cost and large-scale production, and the spray-coated sulfur resin type slow-controlled fertilizer produced by this method Chemical fertilizers can achieve the purpose of slow and controlled release of fertilizers, and can completely solve the problem of secondary soil pollution that exists in traditional coated slow and controlled release fertilizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A manufacturing method of spraying sulfur resin type slow and controlled release chemical fertilizer, using urea granules with a particle diameter of 2mm-4.5mm as raw material, comprising the following steps:

[0026] 1. Preheating, take 1000Kg urea granules and place them in a drum granulator to preheat to 65°C.

[0027] 2. Coating

[0028] A. Take another 250Kg of urea and put it in a melting tank and add 10Kg of water to melt it; after the urea is completely melted, add 250Kg of 250-mesh sulfur powder, 8Kg of polyvinyl alcohol and 10Kg of phenylacrylate alcohol, mix well, and filter into molten urea with uniform texture Resin sulfur liquid, molten urea resin sulfur liquid kept at 125°C;

[0029] B. Make the preheated urea granules form a material curtain in the drum granulator, spray the molten urea resin sulfur solution on the surface of the urea granules by air pressure spraying, the spraying pressure is 0.35MPa-0.45MPa, the coating amount It is 5%-35%, and the c...

Embodiment 2

[0033] A kind of manufacturing method of spraying sulfur resin type slow-controlled release chemical fertilizer, is that the particle size is 2mm-4.5mm nitrogen-phosphorus-potassium compound fertilizer granule is raw material, comprises the following steps:

[0034] 1. Preheating, take 760Kg nitrogen, phosphorus and potassium compound fertilizer granules and place them in a drum granulator to preheat to 65°C.

[0035] 2. Coating

[0036] A. Take 220Kg of urea and put it in a melting tank and add 10Kg of water to melt it; after the urea is completely melted, add 230Kg of 250-mesh sulfur powder, 7Kg of polyvinyl alcohol and 9Kg of phenylacrylate, mix well, and filter to form a uniform molten urea resin Sulfur liquid, molten urea resin sulfur liquid kept at 125°C;

[0037] B. Make the preheated nitrogen, phosphorus and potassium compound fertilizer particles form a material curtain in the drum granulator, and spray the molten urea resin sulfur liquid on the surface of the nitrog...

Embodiment 3

[0041] A kind of manufacturing method of spraying sulfur resin type slow-controlled release chemical fertilizer, is that the particle diameter is 2mm-4.5mm nitrogen-phosphorus-potassium compound fertilizer granule is raw material, comprises the following steps:

[0042] 1. Preheating, take 675Kg nitrogen, phosphorus and potassium compound fertilizer granules and place them in a drum granulator to preheat to 63°C.

[0043] 2. Coating

[0044] A. Take 200Kg of urea and put it in a melting tank and add 9Kg of water to melt it; after the urea is completely melted, add 220Kg of 250-mesh sulfur powder, 7Kg of polyvinyl alcohol and 8Kg of phenylacrylate, mix well, and filter to form a uniform molten urea resin Sulfur liquid, molten urea resin sulfur liquid kept at 125°C;

[0045] B. Make the preheated nitrogen, phosphorus and potassium compound fertilizer particles form a material curtain in the drum granulator, spray the molten urea resin sulfur liquid on the surface of the nitroge...

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Abstract

The invention discloses a production method of a spraying sulfoacid resin type sustained and controlled release fertilizer, comprising the following steps: 1, putting a granular fertilizer in a granulation device for preheating; 2, putting urea in a fusion device for fusing, when urea is completely fused, adding sulphur powder, polyvinyl alcohol and cinnamic acid ester in the fused urea, uniformly stirring, then filtering to obtain a fused urea resin sulphur liquid with uniform quality, allowing the preheated granular fertilizer to form a material curtain in the granulation device, and uniformly spraying the fused urea resin sulphur liquid on the surfaces of the fertilizer particles; 3, carrying out cooling on the sprayed fertilizer in a cooling device; and 4, adding a conditioner in the particle cooling device. The prepared fertilizer disclosed herein can achieve the sustained and controlled-release purpose of the fertilizer, and can thoroughly solve the problem of secondary pollution to soil from the traditional coated sustained and controlled-release fertilizers. In addition, the production method has the advantages of simple process and low production cost, and can be used forforming large scale production.

Description

technical field [0001] The invention relates to a manufacturing process of slow and controlled release chemical fertilizers, in particular to a manufacturing method of spraying sulfur resin type slow and controlled release chemical fertilizers. Background technique [0002] At present, there are mainly four types of slow-release fertilizers in the international fertilizer market: stable nitrogen fertilizers containing transformation inhibitors, organically synthesized slow-release nitrogen fertilizers, polymer-coated slow-release fertilizers and coated slow-release fertilizers. Controlled release fertilizer. [0003] 1. Stable nitrogen fertilizer containing transformation inhibitors. Hydrogen (HQ) and dihydrogen ammonium (DCD) are usually used to inhibit urease and nitrification agents, whose main function is to inhibit nitrogen loss during urea conversion and nitrification, and reduce gaseous loss during leaching and denitrification , has a certain effect on prolonging th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/08C05G5/00C05G3/90
Inventor 魏链任付增传石兆军王丽梅
Owner 河北凯龙肥料有限公司
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