Calcium nitrate magnesium compound salt compound fertilizer and preparation method thereof

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

Active Publication Date: 2016-03-23
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 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 velocit...

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 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 velocity of t...

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 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 velocity of t...

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Abstract

The present invention relates to the manufacturing technology of granular fertilizer, specifically a kind of calcium magnesium nitrate compound salt type compound fertilizer and its preparation method, calcium magnesium nitrate compound salt type compound fertilizer, the total mass of magnesium nitrate and calcium nitrate in the compound fertilizer The percentage is 50-90%, the mass percentage of crystal water is 10-50%, and the mass ratio of magnesium nitrate to calcium nitrate is 3.5-0.1:1. Compared with the prior art, the calcium-magnesium nitrate double-salt compound fertilizer and the preparation method thereof of the present invention have the following beneficial effects: (1) The calcium-magnesium nitrate double-salt compound fertilizer of the present invention has fluidity and caking resistance It is far better than compound fertilizer products obtained by blending and mechanical pressing method granulation, and the caking time of the product is more than 30 days, which brings a lot of convenience to the use of the product; (2) the preparation method of the present invention is better than the batch type The process of crystallization and then mechanical mixing and granulation has low cost, and is also suitable for continuous mass production, which provides convenient conditions for the automation of 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 Patents(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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