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Magnesium nitrate-calcium nitrate complex salt type compound fertilizer and preparation method thereof

The technology of double salt compound fertilizer and calcium and magnesium nitrate is applied in the manufacturing field of granular fertilizer, which can solve the problems of high energy consumption, long manufacturing process cycle, poor flowability and the like, and achieves high hardness, good water solubility and convenient use. Effect

Active Publication Date: 2014-06-04
山西东锦肥业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor fluidity, long manufacturing process cycle and high energy consumption in the existing granular calcium nitrate and magnesium nitrate products, the present invention provides a calcium-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

[0026] The preparation method of calcium-magnesium nitrate double-salt type compound fertilizer, its step is:

[0027] 1) Prepare a mixed aqueous solution of magnesium nitrate and calcium nitrate according to the mass ratio of magnesium nitrate and calcium nitrate of 3.5:1;

[0028] 2) Concentrating the mixed aqueous solution of magnesium nitrate and calcium nitrate to a concentrated solution with a total mass concentration ratio of 75%;

[0029] 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 a spherical or nearly spherical calcium magnesium nitrate double salt compound fertilizer product.

[0030] The falling distance of the sprayed liquid droplets in step 3) is 30m, and the air v...

Embodiment 2

[0033] The preparation method of calcium-magnesium nitrate double-salt type compound fertilizer, its step is:

[0034] 1) Prepare a mixed aqueous solution of magnesium nitrate and calcium nitrate according to the mass ratio of magnesium nitrate and calcium nitrate of 0.67:1;

[0035] 2) Concentrating the mixed aqueous solution of magnesium nitrate and calcium nitrate to a concentrated solution with a total mass concentration ratio of 66%;

[0036] 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 a spherical or nearly spherical calcium magnesium nitrate double salt compound fertilizer product.

[0037] The falling distance of the sprayed liquid droplets in step 3) is 80m, and the air velocit...

Embodiment 3

[0040] The preparation method of calcium-magnesium nitrate double-salt type compound fertilizer, its step is:

[0041] 1) Prepare a mixed aqueous solution of magnesium nitrate and calcium nitrate according to the mass ratio of magnesium nitrate and calcium nitrate of 2.0:1;

[0042] 2) Concentrating the mixed aqueous solution of magnesium nitrate and calcium nitrate to a concentrated solution with a total mass concentration ratio of 50%;

[0043] 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 a spherical or nearly spherical calcium magnesium nitrate double salt compound fertilizer product.

[0044] The falling distance of the sprayed liquid droplets in step 3) is 110m, and the air velocit...

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Abstract

The invention relates to the production technology of granular fertilizers, and specifically relates to a magnesium nitrate-calcium nitrate complex salt type compound fertilizer and a preparation method thereof. The magnesium nitrate-calcium nitrate complex salt type compound fertilizer is characterized in that the total mass percent of magnesium nitrate and calcium nitrate in the compound fertilizer ranges from 50% to 90%, the mass percent of crystal water in the compound fertilizer ranges from 10% to 50%, and the mass ratio of magnesium nitrate to calcium nitrate is (3.5-0.1):1. Compared with the prior art, the magnesium nitrate-calcium nitrate complex salt type compound fertilizer and the preparation method thereof have the beneficial effects that (1) the magnesium nitrate-calcium nitrate complex salt type compound fertilizer is far better than compound fertilizers obtained by doping and pelletizing by a mechanical pressing method in free-running property and anti-caking property, the caking time of the product is above 30 days and therefore, the product can be used very conveniently; (2) the preparation method is lower in cost than a process of batch crystallization as well as mechanical mixing and pelletizing, and also applicable to continuous large-batch production, and therefore, a convenient condition is provided for automatic process control.

Description

technical field [0001] The invention relates to the manufacturing technology of granular fertilizers, in particular to a calcium-magnesium nitrate double-salt compound fertilizer and a preparation method thereof. Background technique [0002] Calcium nitrate and magnesium nitrate are important water-soluble fertilizers for many plants. Although calcium and magnesium are intermediate elements, they are more important than nitrogen, phosphorus and potassium fertilizers for some crops. Among them, calcium is one of the components of the cell wall, which can promote the growth of young roots and the formation of root hairs, and affect the development of cells; increase the resistance of crops to diseases and insect pests, eliminate excessive organic acids in plants, and promote various metabolic processes; Calcium also improves the physical properties of the soil. Magnesium ion is an activator of various enzymes, which promotes the transformation and metabolism of carbohydrates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 蔺向前蔺向光郭长春魏彦红宋晓明赵和平
Owner 山西东锦肥业有限公司
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