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High-tower slow-release compound fertilizer and preparation method thereof

A technology for compound fertilizers and raw materials, applied in the direction of inorganic fertilizers, fertilizer mixtures, ammonium orthophosphate fertilizers, etc., can solve problems such as high production costs, limited popularization, complex process design, etc., and achieve low production costs, simple production processes, and excellent appearance smooth and rounded effect

Active Publication Date: 2010-06-30
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coated fertilizers are favored by people because of their good slow and controlled release performance. The process generally uses organic solvents, the process design is relatively complicated, and the production cost is high, which limits its popularization in agriculture.

Method used

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  • High-tower slow-release compound fertilizer and preparation method thereof
  • High-tower slow-release compound fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A high-tower slow-release compound fertilizer, the weight parts of raw materials are as follows:

[0042] urine 28

[0043] Isobutylidene diurea 15

[0044] Monoammonium phosphate 23

[0045] Potassium sulfate 17

[0046] Magnesium sulfate 4.

[0047] The preparation process of the above-mentioned high-tower slow-release compound fertilizer is:

[0048] (1) Take by weight the parts of isobutylidene diurea, monoammonium phosphate, potassium sulfate and magnesium sulfate that have been crushed to 40 objects, and send them to the preheater for heating and drying;

[0049] (2) send required urine into mixer by weight;

[0050] (3) Add the preheated parts of step (1) into the mixer containing the urine, keep the temperature of the material at 120°C, stir and react for 8 minutes, and prepare a fluid slurry containing suspended solids ;

[0051] The obtained slurry is sprayed into the empty tower through the nozzle on the top of the tower, cooled and solidified by air t...

Embodiment 2

[0053] A high-tower slow-release compound fertilizer is characterized in that the weight parts of raw materials are as follows:

[0054] urine 32.5

[0055] Isobutylidene diurea 19

[0056] Monoammonium phosphate 30

[0057] Potassium chloride 25

[0058] Magnesium sulfate 6.

[0059] The preparation process of the above-mentioned high-tower slow-release compound fertilizer is:

[0060] (1) Take by weight the parts of isobutylidene diurea, monoammonium phosphate, potassium chloride and magnesium sulfate that have been crushed to 60 objects, and send them to the preheater for heating and drying;

[0061] (2) send required urine into mixer by weight;

[0062] (3) Add the preheated parts of step (1) into the mixer containing the urine, keep the temperature of the material at 133°C, stir and react for 10 minutes, and prepare a fluid slurry containing suspended solids ;

[0063] The obtained slurry is sprayed into the empty tower through the nozzle on the top of the tower, c...

Embodiment 3

[0065] A high-tower slow-release compound fertilizer, the weight parts of raw materials are as follows:

[0066] urine 29

[0067]Isobutylidene diurea 16

[0068] Monoammonium phosphate 25

[0069] Potassium chloride 20

[0070] Magnesium sulfate 4.5.

[0071] The preparation process of the above-mentioned high-tower slow-release compound fertilizer is:

[0072] (1) Take by weight the parts of isobutylidene diurea, monoammonium phosphate, potassium chloride and magnesium sulfate that have been crushed to 50 objects, and send them to the preheater for heating and drying;

[0073] (2) send required urine into mixer by weight;

[0074] (3) Add the preheated parts of step (1) into the mixer containing the urine, keep the temperature of the material at 130°C, stir and react for 12 minutes, and prepare a fluid slurry containing suspended solids ;

[0075] The obtained slurry is sprayed into the empty tower through the nozzle on the top of the tower, cooled and solidified by a...

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Abstract

The invention discloses a high-tower slow-release compound fertilizer. The fertilizer contains the following raw materials in parts by weight: 28-32.5 parts of urine, 15-19 parts of isobutylidene diurea, 23-30 parts of monoammonium phosphate, 17-25 parts of potassium sulfate or potassium chloride and 4-6 parts of magnesium sulfate. Since the isobutylidene diurea is taken as slow-release matrix and the fertilizer core internal slow-release technology is adopted, the invention has the advantages that the nutrition slow-release performance is good, the nitrogen loss is reduced, the protection of the ecological environment is facilitated, no production line is required to be newly constructed for the production, the production technology is simple, the investment is saved, the production cost is low, and the popularization and the application of the high-tower slow-release compound fertilizer in the agricultural production are facilitated.

Description

technical field [0001] The invention belongs to the field of fertilizer production, and relates to a high-tower slow-release compound fertilizer and a preparation method thereof. Background technique [0002] The Norwegian tower melt spray granulation process is the first melt granulation technology introduced by Norsk Hydro in the world, and it is a typical process that directly combines molten urine (that is, connected with the urea production system) with molten phosphoric acid. The production process of UAP / UAPK urea-based compound fertilizer with ammonium and powdered potassium chloride as the substrate. The molten urea solution with a concentration of 99% and the monoammonium phosphate melt obtained through the tubular reactor are respectively pumped to the mixer at the top of the prilling tower, and then mixed with the preheated potassium chloride fine powder, Then it is sprayed into the tower with a fan-shaped coverage through a rotating multi-hole nozzle with a scr...

Claims

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Application Information

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IPC IPC(8): C05G1/06C05B7/00C05D1/02C05D5/00
Inventor 徐淑班解玉洪陈剑秋李广涛
Owner KINGENTA ECOLOGICAL ENG GRP
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