Non-agglomerated slow release fertilizer containing sulfur, phosphorous and ammonium and preparation method thereof

A technology of sulfur-containing ammonium phosphate and slow-release fertilizer, which is applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of poor shelf life of sulfur-containing ammonium phosphate slow-release fertilizer, intolerant of sulfur, and fertilizer efficiency effects, to prevent agglomeration, improve The effect of safety and quality improvement

Inactive Publication Date: 2016-03-09
GUIZHOU KAILIN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Not only that, in the above-mentioned prior art, there is also a large amount of nitrogen, phosphorus and other elements remaining in the outer coating of the produced sulfur-containing ammonium phosphate slow-release fertilizer, which is exposed in the air, so that it interacts with the moisture in the air, Then agglomeration occurs, resulting in poor shelf life of the sulfur-containing ammonium phosphate slow-release fertilizer, and the fertilizer efficiency is affected; at the same time, when using elemental sulfur for production, because sulfur is incompatible with water and most organic solvents, the sulfur appears during the production process. Sulfur dust is scattered in the air, resulting in the continuous accumulation of sulfur powder in the air. When the explosion limit is reached, due to friction and heating during production and processing, explosion accidents occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of a non-agglomerated sulfur-containing ammonium phosphate slow-release fertilizer. Put sulfur particles into water containing a dispersant, and use ultrasonic treatment for 10 minutes, then add a wetting agent and a thickener to it, and use ultrasonic treatment for 1 minute. , then place it in a wet grinder and grind until the particle size of the sulfur particles is 0.075mm and the proportion is 98%, and after its suspension rate is 92%, stop grinding to obtain a sulfur-coated slurry; Adding ammonium phosphate particles with a nitrogen content of 18% and a phosphorus content of 46% in the medium, and spraying the sulfur slurry on the surface of the ammonium phosphate particles, then placing it in a drier for 2 minutes, and then packaging it so that it does not agglomerate and contains Ammonium Phosphate Slow Release Fertilizer.

[0026] The addition of the above-mentioned sulfur particles is 30% of the total amount of the sulfur-coated slurry mate...

Embodiment 2

[0033] The preparation method of non-agglomerated sulfur-containing ammonium phosphate slow-release fertilizer is to put sulfur particles into water containing dispersant, and use ultrasonic treatment for 20 minutes, then add wetting agent and thickener to it, and use ultrasonic treatment for 3 minutes, then Put it in a wet grinder and grind until the particle size of the sulfur particles is ≤0.075mm and the proportion is 98%, and after its suspension rate is ≥92%, stop grinding to obtain a sulfur-coated slurry; Adding ammonium phosphate particles with a nitrogen content of 18% and a phosphorus content of 46% in the medium, and spraying the sulfur slurry on the surface of the ammonium phosphate particles, then placing it in a dryer for drying for 3 minutes, and then packaging it so that it does not agglomerate and contains Ammonium Phosphate Slow Release Fertilizer.

[0034] The addition of the above-mentioned sulfur particles is 70% of the total amount of the sulfur-coated sl...

Embodiment 3

[0043]The preparation method of non-agglomerated sulfur-containing ammonium phosphate slow-release fertilizer is to put sulfur particles into water containing dispersant, and use ultrasonic treatment for 15 minutes, then add wetting agent and thickener to it, and use ultrasonic treatment for 2 minutes, then Place it in a wet grinder and grind until the particle size of the sulfur particles is 0.075mm, the proportion is greater than 98%, and after its suspension rate is 92%, stop grinding to obtain a sulfur-coated slurry; Add ammonium phosphate granules with a nitrogen content of 18% and a phosphorus content of 46%, and spray the sulfur slurry on the surface of the ammonium phosphate granules, then place them in a dryer for 3 minutes, and pack them to obtain non-agglomerated sulfur-containing Ammonium Phosphate Slow Release Fertilizer.

[0044] The addition of the above-mentioned sulfur particles is 50% of the total amount of the sulfur-coated slurry material; the above-mention...

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Abstract

The present invention relates to the technical field of slow release fertilizers, in particular to a non-agglomerated slow release fertilizer containing sulfur, phosphorous and ammonium and a preparation method thereof. According to the method provided by the present invention, after sulfur particles and water containing dispersant are mixed and are subjected to ultrasonic treatment, a thickener and a moisturizer are added in the mixture, the ultrasonic treatment is performed again to enable the dispersant, the moisturizer and the thickener to be filled among the sulfur particles, then the mixture is ground by a grinding mill, so that hydrophilicity modification treatment is performed on the sulfur particles, the content of the sulfur in the aqueous solution is high, an explosion accident caused by dust accumulation can not occur, and production safety is improved; the prepared sulfur-covered slurry is sprayed on surfaces of diammonium phosphate particles containing 18% of nitrogen and 46% of phosphorous so as to ensure that the thickness of a sulfur layer on the surface of the prepared slow release fertilizer containing sulfur, phosphorous and ammonium is 0.1-0.3 times of the diameters of the particles; and in the slow release fertilizer containing sulfur, phosphorous and ammonium, the sulfur content is 8-12%, the nitrogen content is 15-17% and the phosphorous content is 41-43%. Quality of the slow release fertilizer containing sulfur, phosphorous and ammonium is improved.

Description

technical field [0001] The invention relates to the technical field of slow-release fertilizers, in particular to a non-agglomerated sulfur-containing ammonium phosphate slow-release fertilizer and a preparation method thereof. Background technique [0002] The sulfur sources in the production process of sulfur-containing ammonium phosphate slow-release fertilizer are mainly divided into two types, one is SO3 in sulfuric acid, and the other is elemental sulfur. [0003] Among them, the production process using sulfur trioxide in sulfuric acid as the sulfur source is to react SO3 sulfuric acid or sulfate with ammonium phosphate to prepare ammonium phosphate compound fertilizer. But this method adopts sulfuric acid to carry out reaction generation, and the requirement of its production equipment is higher, and cost is bigger, and because sulfur trioxide is easy to volatilize, cause the nutrient loss after fertilization is faster, slow-release effect is poor, crop absorption is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
Inventor 陈彬廖吉星朱飞武韩朝应舒茜
Owner GUIZHOU KAILIN GRP CO LTD
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