Granulated magnesium sulfate fertilizer and preparation method thereof

A magnesium sulfate and fertilizer technology, applied in the direction of magnesium fertilizer, inorganic fertilizer, fertilizer mixture, etc., can solve the problems of high disintegration of magnesium content, serious leaching, too fast, etc., and achieve balanced and reasonable nutrient release, which is conducive to absorption, moderately strong effect

Inactive Publication Date: 2015-03-25
营口菱镁化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But, because granule magnesium fertilizer, sulfur magnesium fertilizer are made of one or two kinds of raw materials, wherein each magnesium fertilizer granule only contains water-soluble magnesium or citrate-soluble magnesium, there are following problems: 1, the dissolution too fast of low magnesium content , severe leaching; 2. High magnesium content has poor disintegration, and nutrients are not easily dissolved and absorbed by crops; 3. This kind of granular magnesium fertilizer cannot continuously provide magnesium nutrients for soil and crops in the early, middle and late stages of crop growth, and effective nutrients Insufficient supply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0023] A preparation method of the above-mentioned granular magnesium sulfate fertilizer, comprising the following steps:

[0024] (1) Mixing: Take 70 parts of powdered magnesium sulfate monohydrate, 25 parts of powdered light-burned magnesia, and 5 parts of powdered magnesite, and add the above raw materials into a twin-shaft stirrer and mix and stir for 8 minutes to obtain a mixed uniform dry material;

[0025] (2) Preparation of adhesive: Add powdered light-burned magnesia and sulfuric acid into a reaction tank containing an appropriate amount of water according to the mass ratio of 1:2.5, and stir and react at 100°C for 0.5h to obtain a pH of 6.5 and a mass concentration of 30%. magnesium sulfate solution;

[0026] (3) Granulation: Put 85 parts of the dry material in step (1) into a granulator, then add 10 parts of magnesium sulfate solution in step (2), and granulate at 60°C to obtain granular materials ;

[0027] (4) Drying: put the granular material obtained in step ...

specific Embodiment 2

[0035] A preparation method of the above-mentioned granular magnesium sulfate fertilizer, comprising the following steps:

[0036] (1) Mixing: get 95 parts of powdery magnesium sulfate monohydrate and 5 parts of powdery magnesite, add the above-mentioned raw materials respectively in the biaxial stirrer and mix and stir for 12 minutes to obtain a uniformly mixed dry material;

[0037] (2) Preparation of adhesive: Add powdered light-burned magnesia and sulfuric acid into a reaction tank containing an appropriate amount of water according to the mass ratio of 1:2.5, and stir and react at 110°C for 2 hours to obtain a PH of 7.5 and a mass concentration of 40%. Magnesium sulfate solution;

[0038] (3) Granulation: Put 90 parts of the dry material in step (1) into the granulator, then add 15 parts of the magnesium sulfate solution in step (2), and granulate at 80°C to obtain granular materials ;

[0039] (4) Drying: put the granular material obtained in step (3) into a rotary dru...

specific Embodiment 3

[0047] A preparation method of the above-mentioned granular magnesium sulfate fertilizer, comprising the following steps:

[0048] (1) Mixing: Take 80 parts of powdered magnesium sulfate monohydrate, 10 parts of powdered light-burned magnesia and 10 parts of powdered magnesite, and add the above raw materials into a biaxial stirrer and mix for 10 minutes to obtain a mixed uniform dry material;

[0049](2) Preparation of adhesive: Add powdered light-burned magnesia and sulfuric acid into a reaction tank containing an appropriate amount of water according to the mass ratio of 1:2.5, and stir and react at 105°C for 1 hour to obtain a PH of 7 and a mass concentration of 35%. Magnesium sulfate solution;

[0050] (3) Granulation: Put 88 parts of the dry material in step (1) into the granulator, then add 12 parts of the magnesium sulfate solution in step (2), and granulate at 70°C to obtain the granular material ;

[0051] (4) Drying: put the granular material obtained in step (3)...

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Abstract

The invention relates to a granulated magnesium sulfate fertilizer and a preparation method thereof. The granulated magnesium sulfate fertilizer is prepared from 70-95 parts of powdery magnesium sulfate monohydrate, 0-25 parts of powdery light calcined magnesia and 5-10 parts of powdery magnesite. The preparation method of the granulated magnesium sulfate fertilizer comprises the following steps: (1) mixing materials, namely adding the raw materials to a double shaft agitator for agitation; (2) preparing a binder; (3) pelleting, namely putting the dry materials obtained in the step (1) into an aggregate type pelletizer, and adding the binder in the step (2) to obtain a granular material; (4) drying; (5) cooling; (6) sieving, namely feeding the cooled material to a vibrating screening machine to obtain the fertilizer having the grain size of 2-4mm. The granulated magnesium sulfate fertilizer has the following beneficial effects that the granule strength is moderate, the cost is low, each granule contains magnesium in three forms, namely water-soluble magnesium, citric acid-soluble magnesium and slightly soluble magnesium, and the nutrients are released reasonably in a balanced manner and advantageous for crops to absorb.

Description

technical field [0001] The invention belongs to the field of agricultural fertilizers, and relates to a fertilizer, in particular to a granular magnesium sulfate fertilizer and a preparation method thereof. Background technique [0002] Magnesium is an essential nutrient element for plant growth. Magnesium is an important core element in the composition of chlorophyll in plants and plays an important role in chlorophyll synthesis and photosynthesis. Magnesium participates in the assimilation of carbon dioxide in chloroplasts, which is beneficial to the synthesis of sugar and starch; magnesium also participates in the synthesis of sugar, protein and fat. Magnesium can promote the synthesis of vitamin A and vitamin C, and participate in the synthesis reaction of fatty acids, thereby increasing the oil content of oil crop seeds. Magnesium can promote the balanced absorption of other nutrients by plant roots. Sufficient magnesium supply is one of the important factors to increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05D5/00
CPCC05D5/00C05G5/12
Inventor 杨云洪车太龙李长龙
Owner 营口菱镁化工集团有限公司
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