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, complex granulation process, large dust environment, etc., so as to improve the citric acid-soluble MgO and water-soluble MgO content, good disintegration, and the effect of reducing dust pollution and waste

Inactive Publication Date: 2006-06-14
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

[0028] a. Material mixing: take 970 kg of brucite powder with a particle size of 80 meshes and a citric acid-soluble MgO mass content of 57% and 30 kg of natural magnesium sulfate powder with a particle size of 80 meshes and a water-soluble MgO mass content of 22%, add them to the mixer and stir for 10 minutes Mix well.

[0029] b. Granulation: add the above mixed powder into the granulator, add 15% of the water of the above mixed powder as a binder, and granulate; when 70% of the particles in the granulator reach the requirement of Φ2-4mm, The granulated products are taken out from the granulator, screened and classified with two-layer screen meshes with apertures of 2mm and 4mm. 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 , crushed with a pulverizer and then returned to the granulator to re-granulate;

[0030] c. Drying: The granulated qualified p...

Embodiment 2

[0034] Take 990 kg of brucite powder with a particle size of 60 meshes and a citric acid-soluble MgO mass content of 62% and 10 kg of natural magnesium sulfate powder with a particle size of 60 meshes and a water-soluble MgO mass content of 29%, add them to a mixer and stir for 10 minutes to mix; Mixed powder quality 25% of water is used as binder, and brucite granular fertilizer is prepared according to Example 1.

[0035] The inspection results of the obtained products are: appearance and particle size: Φ2-4mm spherical particles; 2-4mm aperture sieve pass rate: 100%; hardness: 4.0kg / cm 2 ; Disintegration rate: 100%: citric acid-soluble MgO mass content: 62%; water-soluble MgO mass content 3%; moisture mass content: 0.0%.

Embodiment 3

[0037] Take 870 kg of brucite powder with a particle size of 70 meshes and a citric acid-soluble MgO mass content of 60% and 130 kg of natural magnesium sulfate powder with a particle size of 70 meshes and a water-soluble MgO mass content of 26%, add them to a mixer and stir for 10 minutes to mix; The water with 20% mass of the mixed powder was used as a binder, and the brucite granular fertilizer, also called mixed bitter soil ball, was prepared according to Example 1.

[0038] The inspection results of the obtained products are: appearance and particle size: Φ2-4mm spherical particles; 2-4mm aperture sieve pass rate: 98%; hardness: 2.5kg / cm 2 ; Disintegration rate: 98%: citric acid-soluble MgO mass content: 58%; water-soluble MgO mass content 4; moisture 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, and relates 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 is widely used in compound fertilizer to supplement the trace elements needed by crops due to its abundant raw materials and low price. , when it is mixed and used with other fertilizers, it is easy to cause environmental pollution and waste due to large dust. The current brucite fertilizer granules not only have the defects of low hardness, low disintegration rate and low content of citric acid-soluble MgO, but also have complicated granulation process and high production cost, which limit their application. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a kind of brucite granular fertilizer with high hardness, high disintegratio...

Claims

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Application Information

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Patent Type & Authority Applications(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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