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Control method for preventing caking and chalking of high-tower nitro-sulfenyl compound fertilizer

A technology of sulfur-based compound fertilizer and control method, which is applied in the direction of fertilization equipment, fertilizer mixture, application, etc., can solve the problems that the packaging temperature cannot reach normal temperature, the moisture content of raw materials is too high, and it is easy to form compaction and pulverization, so as to reduce the easy Effect of hardening, improving gloss and reducing surface chalking

Active Publication Date: 2013-01-16
GUIGANG BATIAN ECOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the change of the crystal structure of ammonium nitrate or nitrophosphate compound fertilizer at different temperatures, the strong hygroscopicity of ammonium nitrate itself, and the semi-finished product absorbs moisture in the air during cooling and screening, the moisture content of the raw materials used is high, and the packaging temperature cannot reach Problems such as normal temperature and so on make the nitrosulfur-based compound fertilizer produced by the existing high-tower melting granulation easy to form compaction and pulverization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Add 3 parts of ammonium nitrate, 35 parts of nitrophosphate compound fertilizer and 20 parts of monoammonium phosphate into the melting tank, and melt them at 150°C to obtain an eutectic slurry;

[0025] Step 2: Send the eutectic slurry into the mixing system, and add 1 part of ammonium sulfate, 7 parts of monoammonium phosphate, 30 parts of potassium sulfate, 3.5 parts of stone powder, 0.5 parts of zinc compound and mix uniformly at 152℃ Slurry

[0026] Step 3: Send the mixed slurry to the emulsification system for crushing, dispersion, emulsification and homogenization to form an emulsified slurry;

[0027] Step 4: Send the emulsified slurry to the granulation system for granulation, and after the tower body heat exchange, cooling, screening and surface treatment, the compound fertilizer particles are obtained.

[0028] After testing, the obtained compound fertilizer contains 15.1% nitrogen, 15.1% phosphorus, 14.7% potassium, average particle strength ≥32N, average pa...

Embodiment 2

[0030] Step 1: Add 3 parts of ammonium nitrate, 35 parts of nitrophosphate compound fertilizer and 20 parts of monoammonium phosphate into the melting tank, and melt them at 150°C to obtain an eutectic slurry;

[0031] Step 2: Send the eutectic slurry into the mixing system, and add 1 part of ammonium sulfate, 7 parts of monoammonium phosphate, 30 parts of potassium sulfate, 2.5 parts of stone powder, 0.5 parts of zinc compound and 1 part of magnesium sulfate monohydrate Mix uniformly at 152°C to obtain a mixed slurry;

[0032] Step 3: Send the mixed slurry to the emulsification system for crushing, dispersion, emulsification and homogenization to form an emulsified slurry;

[0033] Step 4: Send the emulsified slurry to the granulation system for granulation, and after the tower body heat exchange, cooling, screening and surface treatment, the compound fertilizer particles are obtained.

[0034] After testing, the obtained compound fertilizer has a nitrogen content of 15.5%, a phospho...

Embodiment 3

[0036] Step 1: Add 3 parts of ammonium nitrate, 35 parts of nitrophosphate compound fertilizer and 20 parts of monoammonium phosphate into the melting tank, and melt them at 150°C to obtain an eutectic slurry;

[0037] Step 2: Send the eutectic slurry into the mixing system, and add 1 part of ammonium sulfate, 7 parts of monoammonium phosphate, 30 parts of potassium sulfate, 1.5 parts of stone powder, 0.5 parts of zinc compound and 2 parts of magnesium sulfate monohydrate Mix uniformly at 152°C to obtain a mixed slurry;

[0038] Step 3: Send the mixed slurry to the emulsification system for crushing, dispersion, emulsification and homogenization to form an emulsified slurry;

[0039] Step 4: Send the emulsified slurry to the granulation system for granulation, and after the tower body heat exchange, cooling, screening and oil injection treatment, the compound fertilizer particles are obtained.

[0040] After testing, the obtained compound fertilizer has a mass content of 15.4% nitroge...

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Abstract

The invention discloses a control method for preventing caking and chalking of high-tower nitro-sulfenyl compound fertilizer. The method comprises steps as follows: adding ammonium nitrate and / or nitro-phosphorus compound fertilizer and ammonium phosphate to a melting groove to be molten, so as to obtain co-melting size; transferring the co-melting size into a mixing system; and adding phosphatic fertilizer, potash fertilizer, medium trace element, magnesium sulfate monohydrate and filling materials to be uniformly mixed to obtain the mixing size; transferring the mixing size into an emulsifying system to be broken, diffused and homogenized, so as to obtain emulsion size; transferring the emulsion size into a granulation system for granulation; and then carrying out steps of heat exchange through a tower body, cooling, sieving and surface treatment and the like. According to the control method disclosed by the invention, the magnesium sulfate monohydrate is added to the mixing size, so that the particle strength of the product is averagely increased by 4 to 12N by being compared with the particle strength of the product without adding the magnesium sulfate monohydrate or without improving the melting or mixing temperature, and the free water is reduced by 0.2 to 0.4%, and the caking and chalking of the stocked product are effectively prevented, and the time of the chalking can be prolonged.

Description

Technical field [0001] The invention relates to a method for preventing agglomeration and pulverization of high-tower compound fertilizer production, in particular to a method for preventing agglomeration and pulverization of high-tower melting granulation production of nitrosulfur-based compound fertilizer. Background technique [0002] The existing high-tower nitrosulfur-based melting granulation process generally uses ammonium nitrate or nitrophosphate compound fertilizer and a certain proportion of ammonium phosphate to be melted in a melting tank, heated to melt into a liquid phase, and nitrogen fertilizer is added to the first-level mixing tank , Phosphate fertilizer, potash fertilizer, medium and trace elements, fillers, fully mixed, and then further mixed through the secondary mixing tank, the mixed slurry enters the granulation system for spray granulation, and the fertilizer particles are collected at the bottom of the tower for cooling and screening , Surface treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 李振球刘庆平唐潘翔田小山陈燕文余一清覃蕾宁傅润书
Owner GUIGANG BATIAN ECOLOGY
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