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Potassium-magnesium nitrate double-salt type compound fertilizer and preparation method thereof

A technology of double salt type compound fertilizer and potassium magnesium nitrate is applied in the field of manufacturing granular fertilizers, which can solve the problems of high energy consumption, long manufacturing process cycle, poor fluidity, etc., and achieve high hardness, good water solubility, and convenient use. Effect

Active Publication Date: 2014-06-18
JIAOCHENG KNLAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor fluidity, long manufacturing process cycle and high energy consumption in existing granular magnesium nitrate and potassium nitrate products, the present invention provides a potassium magnesium nitrate double salt compound fertilizer and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of potassium nitrate magnesium double salt type compound fertilizer, its step is:

[0025] 1) Prepare a mixed aqueous solution of potassium nitrate and magnesium nitrate according to the mass ratio of potassium nitrate and magnesium nitrate of 1.2:1;

[0026] 2) Concentrating the mixed aqueous solution of potassium nitrate and magnesium nitrate to a concentrated solution with a total mass concentration ratio of 75%;

[0027] 3) Transport the concentrated liquid to the high-level tank, control the temperature of the material in the high-level tank at 100°C, and then continuously spray the material from the nozzle with an aperture of 2.5mm, and the sprayed liquid droplets will be in the process of falling. The air undergoes heat exchange, cools and solidifies to form spherical or nearly spherical potassium magnesium nitrate double salt compound fertilizer products.

[0028] The falling distance of the sprayed liquid droplets in step 3) is 30m, and ...

Embodiment 2

[0031] The preparation method of potassium nitrate magnesium double salt type compound fertilizer, its step is:

[0032] 1) Prepare a mixed aqueous solution of potassium nitrate and magnesium nitrate according to the mass ratio of potassium nitrate and magnesium nitrate of 0.2:1;

[0033] 2) Concentrating the mixed aqueous solution of potassium nitrate and magnesium nitrate to a concentrated solution with a total mass concentration ratio of 66%;

[0034] 3) Transport the concentrated liquid to the high-level tank, control the temperature of the material in the high-level tank at 130°C, and then continuously spray the material from the nozzle with an aperture of 0.5mm, and the sprayed droplets will be in the process of falling. The air undergoes heat exchange, cools and solidifies to form spherical or nearly spherical potassium magnesium nitrate double salt compound fertilizer products.

[0035] The falling distance of the sprayed liquid droplets in step 3) is 80m, and the air...

Embodiment 3

[0038] The preparation method of potassium nitrate magnesium double salt type compound fertilizer, its step is:

[0039] 1) Prepare a mixed aqueous solution of potassium nitrate and magnesium nitrate according to the mass ratio of potassium nitrate and magnesium nitrate of 5.8:1;

[0040] 2) Concentrating the mixed aqueous solution of potassium nitrate and magnesium nitrate to a concentrated solution with a total mass concentration ratio of 50%;

[0041] 3) Transport the concentrated liquid to the high-level tank, control the temperature of the material in the high-level tank at 120°C, and then continuously spray the material from the nozzle with an aperture of 3.0mm, and the sprayed droplets will be in the process of falling. The air undergoes heat exchange, cools and solidifies to form spherical or nearly spherical potassium magnesium nitrate double salt compound fertilizer products.

[0042] The falling distance of the sprayed liquid droplets in step 3) is 110m, and the ai...

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Abstract

The invention relates to a preparation technology of a granular fertilizer and particularly relates to a potassium-magnesium nitrate double-salt type compound fertilizer and a preparation method thereof. The compound fertilizer contains 50-90wt% of potassium nitrate and magnesium nitrate in total and 10-50wt% of crystal water, wherein the mass ratio of potassium nitrate to magnesium nitrate is (15-0.2):1. Compared with the prior art, the potassium-magnesium nitrate double-salt type compound fertilizer and the preparation method of the compound fertilizer have the following beneficial effects: (1) the potassium-magnesium nitrate double-salt type compound fertilizer is far better in dispersibility and anti-caking performance than a compound fertilizer product obtained via mixing and mechanical pressing granulation, and the caking time of the compound fertilizer is over 30 days, so that great convenience is brought for the use of the compound fertilizer; (2) compared with the technology that intermittent crystallization is performed firstly and then mechanical mixing and granulation are performed, the preparation method is lower in cost and suitable to continuous large-batch production, so that convenient conditions are provided for the automation of technology control.

Description

technical field [0001] The invention relates to the manufacturing technology of granular fertilizers, in particular to potassium and magnesium nitrate double-salt compound fertilizers and a preparation method thereof. Background technique [0002] Potassium nitrate and magnesium nitrate are important water-soluble fertilizers for many plants. Among them, potassium is an indispensable basic fertilizer component for various crops. Magnesium ion is an activator of various enzymes, which can promote the transformation and metabolism of sugar in plants, and promote the synthesis of fat and protein. Applying magnesium to oil crops can increase their oil content, and magnesium can also promote the absorption of silicon by crops. [0003] Most of the existing compound fertilizers containing potassium nitrate or magnesium nitrate are granulated by blending and mechanical pressing. The manufacturing process is long, the energy consumption is high, the material distribution is uneve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05C5/02
Inventor 蔺向前蔺向光郭长春魏彦红宋晓明赵和平
Owner JIAOCHENG KNLAN CHEM
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