Brucite granular fertilizer and its preparation method

A brucite particle and brucite technology, which is applied in magnesium fertilizers, inorganic fertilizers, fertilizer forms, etc., can solve the problems of low content of citric acid-soluble MgO, complicated granulation process, large dust environment, etc. and water-soluble MgO content, good disintegration, and the effect of reducing dust pollution and waste

Inactive Publication Date: 2008-01-02
大连爱思凯矿产有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Magnesium fertilizer is an important part of agricultural compound fertilizer, especially brucite powder, because of its rich raw materials and low price, it is widely used in compound fertilizers to supplement the trace elements needed by crops. Most of the current market supply is brucite powder , when it is mixed and used with other fertilizers, it is easy to cause environmental pollution and waste due to the large dust
The current brucite fertilizer granules not only have the defects of low hardness, low disintegration rate and low citrate-soluble MgO content, but also have complicated granulation process and high production cost, which limit their application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a, material mixing: take 970 kg of brucite powder with a particle size of 80 mesh and a mass content of citrate-soluble MgO of 57% and 30 kg of natural magnesium sulfate powder with a particle size of 80 mesh and a mass content of water-soluble MgO of 22%, add them to the mixer and stir for 10 minutes Mix well.

[0028] b. Granulation: Add the above-mentioned mixed powder into a granulator, add water with 15% of the above-mentioned mixed powder mass as a binder, and carry out granulation; when 70% of the particles in the granulator have reached the requirement of Φ2-4mm, Take out the granulated products from the granulator, screen and classify them with two-layer screens with apertures of 2mm and 4mm, and the qualified products enter the next step, and those with a diameter of less than 2mm are directly returned to the granulator for re-granulation; materials larger than 4mm , return to the granulator to re-granulate after crushing with a pulverizer;

[0029] c. Drying...

Embodiment 2

[0033] Get 990 kilograms of brucite powder with a particle size of 60 orders and a mass content of citrate-soluble MgO of 62% and 10 kilograms of natural magnesium sulfate powder with a particle size of 60 orders and a mass content of water-soluble Mg of 29%, add them to a mixer and stir for 10 minutes to mix evenly; 25% water of the mixed powder mass was used as binder, and brucite granule fertilizer was obtained according to Example 1.

[0034] The test results of the obtained product are: Appearance and particle size: Φ2-4mm spherical particles; 2-4mm aperture sieve pass rate: 100%; Hardness: 4.0kg / cm 2 Disintegration rate: 100%: mass content of citrate-soluble MgO: 62%; mass content of water-soluble MgO: 3%; mass content of water: 0.0%.

Embodiment 3

[0036] Get 870 kilograms of brucite powder with a particle size of 70 orders and a mass content of citrate-soluble MgO of 60% and 130 kilograms of natural magnesium sulfate powder with a particle size of 70 orders and a mass content of water-soluble MgO of 26%, add them to a mixer and stir for 10 minutes to mix; 20% water of the mixed powder quality is used as a binding agent, and the brucite granular fertilizer is obtained according to Example 1, also called mixed bitter soil balls.

[0037] The test results of the obtained product are: appearance and particle size: Φ2-4mm spherical particles; 2-4mm aperture sieve pass rate: 98%; hardness: 2.5kg / cm 2 ; Disintegration rate: 98%: citrate-soluble MgO mass content: 58%; water-soluble MgO mass content 4; water mass content: 1.0%.

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Abstract

The present invention relates to a brucite granule fertilizer and its preparation method. Said preparation method includes the following steps: mixing brucite, natural magnesium sulfate and light calcined magnesium, using water or 5% (mass) of citric acid solution as binding agent, mixing all the materials, granulating drying and packaging so as to obtain spherical granules whose diameter is 2-4mm, in which water content is less than or equal to 1%, hardness is 1.5-4kg / sq.cm, disintegration rate is greater than or equal to 90%, citric-soluble MgO mass content is 53-62% and water-soluble MgO mass content is 3-5%.

Description

technical field [0001] The invention relates to the field of agricultural compound fertilizers, in particular to a brucite granular fertilizer and a preparation method thereof. Background technique [0002] Magnesium fertilizer is an important part of agricultural compound fertilizer, especially brucite powder, because of its rich raw materials and low price, it is widely used in compound fertilizers to supplement the trace elements needed by crops. Most of the current market supply is brucite powder , when it is mixed and used with other fertilizers, it is easy to cause environmental pollution and waste due to the large dust. The current brucite fertilizer granules not only have the defects of low hardness, low disintegration rate and low citrate-soluble MgO content, but also have complicated granulation process and high production cost, which limit their application. Contents of the invention [0003] The object of the present invention is to provide a brucite granular ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D5/00C05G5/00
Inventor 李树新
Owner 大连爱思凯矿产有限公司
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