Eau douce granulation of magnesium sulfuric acid monohydrate

A water magnesium sulfate, magnesium sulfate technology, applied in magnesium sulfate, application, special binder granulation and other directions, can solve problems such as affecting the main content of granulated products, pollute the environment, waste resources, etc., and achieve low cost, smooth particles, Easy-to-use effects

Inactive Publication Date: 2008-05-07
NAFINE CHEMICAL INDUSTRY GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the magnesium sulfate monohydrate used in the fertilizer industry is in powder form. When used or mixed with other fertilizers, the dust is large, which wastes resources and pollutes the environment.
At present, there is no report on the granulation of magnesium sulfate monohydrate, and some non-fertilizers such as attapulgite are used as binders in the granulation of the fertilizer industry, which affects the main content of the granulated products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Pour the magnesium sulfate monohydrate powder containing MgO26.5% into the granulation area of ​​the disc granulator, slowly add water with a material volume of about 25% as a binder for granulation, and use a 1mm and 6mm two-layer screen Sieve, put the particles of 1mm~6mm into the multi-layer vibrating fluidized drying bed, the inlet air temperature is 300℃~400℃, the outlet air temperature is 110℃~120℃, and the products that come out are then screened with two layers of 1mm and 5mm Sieve and pack the Φ1mm~Φ5mm particles to obtain granular magnesium sulfate monohydrate. The small pellets obtained by the two screenings are returned to the disc granulator for re-granulation, and the large pellets are crushed and then returned to the disc granulator for re-granulation. The product inspection results are:

[0011] MgO: 25.4%

[0012] Hardness: 12N / cm 2

[0013] Particle size: Φ1mm~Φ5mm

Embodiment 2

[0015] Pour the magnesium sulfate monohydrate powder material containing MgO26.6% into the disc granulator granulation area, and the granulation process is the same as example 1 to obtain granular magnesium sulfate monohydrate. The product inspection results are:

[0016] MgO: 25.6%

[0017] Hardness: 13N / cm 2

[0018] Particle size: Φ1mm~Φ5mm

Embodiment 3

[0020] Pour the magnesium sulfate monohydrate powder material containing MgO26.8% into the disc granulator granulation area, and the granulation process is the same as example 1 to obtain the magnesium sulfate monohydrate granule. The product inspection results are:

[0021] MgO: 26.1%

[0022] Hardness: 18N / cm 2

[0023] Particle size: Φ1mm~Φ5mm

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Abstract

The invention discloses a method of making magnesium sulfate mono-hydrate with clear water. The invention comprises the steps as follows: utilizing clear water as the cementing agent; feeding the magnesium sulfate mono-hydrate in a disc granulating machine to finish granulating, drying and screening and producing ball particle with outer diameter of 1mm to 5mm after packing, wherein, the MgO is larger than or equal to 25.0 percent, the hardness is larger than or equal to 10N / cm2. The product does not contain the impurities bringing from other cementing agent and has the advantages of smooth and even particle except high purity.

Description

Technical field: [0001] The invention belongs to the use of clear water to granulate magnesium sulfate monohydrate (MgSO 4 .H 2 O). Background technique: [0002] Magnesium sulfate monohydrate is a special additive required for the production of compound fertilizers. The water-soluble magnesium oxide is as high as 23%, which can effectively solve the soil magnesium deficiency. At present, the magnesium sulfate monohydrate used in the fertilizer industry is in the form of powder. When used or mixed with other fertilizers, the dust is large, which wastes resources and pollutes the environment. Magnesium sulfate monohydrate granulation has not been reported at present, and some non-fertilizers such as attapulgite are used as binders in the granulation of the fertilizer industry, which affects the main content of the granulated products. Invention content: [0003] The purpose of the present invention is to propose to granulate magnesium sulfate monohydrate with clear water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/40B01J2/28C05G3/04C05G5/00C05G3/80
Inventor 贺春宝曹涑旺赵毅
Owner NAFINE CHEMICAL INDUSTRY GROUP CO LTD
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