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Preparation method for water-soluble fertilizer through high tower melt granulation

A water-soluble fertilizer, melt granulation technology, applied in the direction of fertilizer form, fertilizer mixture, fertilization device, etc., can solve the problems of high-tower water-soluble fertilizer, high water-insoluble content, increased water-insoluble content, etc., to achieve reduction Production of water-insoluble matter, fertilizer smoothness, and cost-increasing effects

Inactive Publication Date: 2013-01-02
GUIGANG BATIAN ECOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the raw materials are easy to produce insoluble substances such as calcium salts and magnesium salts after being melted at high temperature on the tower, it brings certain difficulties to the preparation of high-tower water-soluble fertilizers. The prepared fertilizer has more than 6% water-insoluble substances and a lot of slag.
[0003] In addition, in the existing high-tower nitrothiol preparation process, since the temperature on the tower needs to be controlled at about 156°C, some even at 160°C, the higher temperature makes the materials on the tower prone to side reactions water insoluble
[0004] It can be seen that the main reasons for the high water-insoluble content of the preparation of high-tower nitrosulfur-based compound fertilizers are as follows: the first, the water-insoluble content in the raw materials exceeds the standard; the second, the water content caused by improper operation in the preparation process Increased content of insolubles

Method used

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  • Preparation method for water-soluble fertilizer through high tower melt granulation

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Effect test

Embodiment 1

[0032] A preparation method of high tower melt granulation water-soluble fertilizer, the method comprises the steps of:

[0033] a. Add 0.6 tons of ammonium nitrate with a water-insoluble content below 0.8% and 2.9 tons of ammonium nitrate-containing mixture into the melting tank through a hoist, and add 1 ton of monoammonium phosphate with a water-insoluble content below 2.0%, Melt at a temperature of 140°C-145°C;

[0034] b. The ammonium nitrate and monoammonium phosphate eutectic slurry produced in step a are overflowed to the mixing system, and sulfuric acid with a water-insoluble content of less than 0.8% is added through the elevator in the primary and secondary mixing tanks of the mixing system After 0.65 tons of ammonium, 1.9 tons of monoammonium phosphate with a water-insoluble content of less than 2.0%, 2.85 tons of potassium sulfate with a water-insoluble content of less than 1.0%, and 0.1 tons of magnesium sulfate monohydrate, a water-soluble trace element containi...

Embodiment 2

[0038] A preparation method of high tower melt granulation water-soluble fertilizer, the method comprises the steps of:

[0039] a. Add 0.7 tons of ammonium nitrate with a water-insoluble content below 0.8% and 2.3 tons of ammonium nitrate-containing mixture into the melting tank through a hoist, and add 1.2 tons of monoammonium phosphate with a water-insoluble content below 2.0%, Melt at a temperature of 140°C-145°C;

[0040] b. The ammonium nitrate and monoammonium phosphate eutectic slurry produced in step a are overflowed to the mixing system, and sulfuric acid with a water-insoluble content of less than 0.8% is added through the elevator in the primary and secondary mixing tanks of the mixing system After 0.4 tons of ammonium, 2 tons of monoammonium phosphate with a water-insoluble content of less than 2.0%, 1.65 tons of potassium sulfate and 1.65 tons of potassium nitrate with a water-insoluble content of less than 1.0%, and 0.1 tons of water-soluble trace element borax ...

Embodiment 3

[0044] A preparation method of high tower melt granulation water-soluble fertilizer, the method comprises the steps of:

[0045] a. Add 0.6 tons of ammonium nitrate and 2.9 tons of ammonium nitrate-containing mixture with a water-insoluble content of less than 0.8% into the melting tank through an elevator, and add 20kg of water to melt at a temperature of 140°C-145°C ;

[0046] b. The ammonium nitrate-containing eutectic slurry produced in step a is overflowed to the mixing system, and 0.65 tons of ammonium sulfate with a water-insoluble content of less than 0.8% is added through a hoist in the primary and secondary mixing tanks of the mixing system 2.9 tons of monoammonium phosphate with a water-insoluble content of less than 2.0%, 2.85 tons of potassium sulfate with a water-insoluble content of less than 1.0%, and 0.1 ton of zinc sulfate monohydrate, a water-soluble trace element containing zinc compounds, at 145°C- Mix evenly at a temperature of 152°C;

[0047] c. sending ...

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Abstract

The invention relates to a preparation method for a water-soluble fertilizer through high tower melt granulation. The method comprises the following steps: adding ammonium nitrate or a mixture containing ammonium nitrate into a melting tank, individually adding ammonium phosphate and water or adding a mixture of ammonium phosphate and water to reduce the melting point of ammonium nitrate and carrying out melting at a temperature of 140 to 145 DEG C; delivering a molten slurry into a mixing system, adding a nitrogenous fertilizer, a phosphate fertilizer, a potash fertilizer and water-soluble trace elements needed in preparation of a fertilizer and carrying out uniform mixing at a temperature of 145 to 152 DEG C; and carrying out emulsification, granulation, heat exchange, primary cooling, cooling, screening and oil injection to obtain the water-soluble fertilizer with the content of water-insoluble substances controlled to be less than 3.0%. The preparation method provided by the invention effectively reduces production of water-insoluble substances through controlling of temperature, has the advantages of novelty, environment-friendliness, low energy consumption and the like and prepares the water-soluble fertilizer which has a smooth and round shape and high strength, does not harden during storage and contains 35 to 48% of total nutrients on the basis of no increase of cost.

Description

technical field [0001] The invention relates to the technical field of high-tower melt granulation compound fertilizer, in particular to a preparation method of high-tower melt granulation water-soluble compound fertilizer. Background technique [0002] The preparation method of the high-tower nitrosulfur-based compound fertilizer is as follows: use molten ammonium nitrate or the melted mixture containing ammonium nitrate as the liquid phase, add nitrogen fertilizer, phosphate fertilizer, potassium fertilizer, and water-soluble trace elements, fully mix in the mixing system, and pass through the emulsifier. Then enter the granulation system for granulation, and then form smooth round granules through heat exchange in the tower body and primary cooling, and finally get the finished fertilizer through cooling, screening, and oil injection system. Because raw materials are easy to produce insoluble substances such as calcium salts and magnesium salts after being melted at high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G5/00
Inventor 唐潘翔刘庆平田小山李振球陈燕文余一清覃蕾宁傅润书
Owner GUIGANG BATIAN ECOLOGY
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