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Granulation method of anhydrous sodium sulfate

Anhydrous sodium sulfate, granulation technology, applied in chemical instruments and methods, alkali metal sulfite/sulfite, inorganic chemistry, etc., can solve the problem of affecting the main component content of granulated products, affecting the use of chemical industry, impurities Access and other issues, to achieve the effect of low cost, convenient operation, and less investment

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

Powder products are likely to cause dust pollution during use and have poor fluidity
At present, there is no report on the granulation of anhydrous sodium sulfate. Some attapulgite non-fertilizer substances are used as binders in the granulation of the fertilizer industry, which will affect the main component content of the granulated product and cause impurities to enter. Affect the use of chemical industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] will contain Na 2 SO 4 Pour 98.2% of anhydrous sodium sulfate powder into the granulation area of ​​the disc granulator, slowly add 10wt% Na 2 SO 4 The solution (accounting for about 25% of the powder amount) is used as a binder for granulation, sieved with a 1mm and 6mm two-layer screen, and the 1mm~6mm particles are put into a vibrating fluidized drying bed, and the air inlet temperature is 150℃~ 200°C, the outlet air temperature is 80°C~110°C, and the products that come out are sieved with 1mm and 5mm two-layer sieves, and the Φ1mm~Φ5mm particles are packaged to obtain granular anhydrous sodium sulfate. 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:

[0014] Na 2 SO 4 : 98.0%

[0015] Hardness: 12N / cm 2

[0016] Particle size: Φ1mm~Φ5mm.

Embodiment 2

[0018] will contain Na 2 SO 4 Pour 98.6% of anhydrous sodium sulfate powder into the granulation area of ​​the disc granulator, slowly add 15wt% Na 2 SO 4 The solution (accounting for about 25% of the powder amount) is used as a binding agent to granulate, and all the other procedures are the same as in Example 1 to obtain granular anhydrous sodium sulfate. The product inspection results are:

[0019] Na 2 SO 4 : 98.5%

[0020] Hardness: 14N / cm 2

[0021] Particle size: Φ1mm~Φ5mm.

Embodiment 3

[0023] will contain Na 2 SO 4 99.1% of anhydrous sodium sulfate powder is poured into the granulation area of ​​the disc granulator, slowly adding 20wt% Na 2 SO 4 Solution (accounting for about 25% of powder amount) is used as binding agent to granulate, and all the other operations are with embodiment 1, and granular anhydrous sodium sulfate is obtained according to example 1. The product inspection results are:

[0024] Na 2 SO 4 : 99.0%

[0025] Hardness: 15N / cm 2

[0026] Particle size: Φ1mm~Φ5mm.

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PUM

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Abstract

The invention relates to a granulation method of anhydrous sodium which uses a solution containing 10wt percent-25wt percent of Na2SO4 as a caking agent. Phi1 mm to Phi 5 mm spherical anhydrous sodium grains can be obtained by granulating, drying, screening, and packing anhydrous sodium sulfate in a round-plate granulator. The content of the Na2SO4 in the product is more than or equal to 98.0 percent, and the stiffness of the product is more than and equal to 10 N / cm <2>. The product does not contain impurities brought in by other caking agents, and has the advantages of smooth and even grain, and high stiffness and purity.

Description

Technical field: [0001] The invention belongs to anhydrous sodium sulfate (Na 2 SO 4 ) Granulation method of powder. Background technique: [0002] Anhydrous sodium sulfate, also known as Yuanming powder, is an important chemical raw material, and the products usually used in the industry are all in powder form. Powder products are likely to cause dust pollution during use and have poor fluidity. At present, there is no report on the granulation of anhydrous sodium sulfate. Some attapulgite non-fertilizer substances are used as binders in the granulation of the fertilizer industry, which will affect the main component content of the granulated product and cause impurities to enter. Affect the use of chemical industry. Invention content: [0003] The purpose of the present invention is to propose a kind of granulation method of anhydrous sodium sulfate, both will satisfy the customer's use requirement, reduce dust pollution as far as possible, can't reduce its active in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/00
Inventor 曹涑旺贺春宝赵毅
Owner NAFINE CHEMICAL INDUSTRY GROUP CO LTD
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