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Polyhalite Granulation Method

A technology of polyhalite and granules, applied in the field of preparation of polyhalite granules, can solve problems such as the difference between slow-release fertilizers and controlled-release fertilizers

Active Publication Date: 2022-06-28
ICL EUROPE COOPERATIEF U A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, slow-release and controlled-release fertilizers differ in many ways: the technology they use, release mechanism, longevity, release control factors, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment -1

[0050] Mixer speed: 350rpm (line speed of 7.3 m / s)

[0051] Chopper Speed: 1500rpm

[0052] The residence time is 7-10min,

[0053] The yield is about 50%-70%. The order of the method:

[0054] 1- Fill the mixer and mix for a minute then stop.

[0055] 2- Mix the binder (5% by weight of feed) with water (6% by weight of feed) in a small vessel (mixture).

[0056] 3- Add the mixture (binder + water) to the mixer and start the mixer and chopper for 5 minutes.

[0057] 4- Add water to the mixer without stopping, the addition amount is equal to 0.5% of the feed weight, stop the chopper after adding the water.

[0058] 5- Continue mixing for another two minutes

[0059] 6- Discharge material

[0060] 7- Introduce the material into the fluidized bed at 20 degrees for one minute

[0061] 8- Dry the material at 150 degrees for five minutes.

[0062] 9- Sieve material from 1.4mm to 4.75mm

[0063] Roller test

[0064] The roller test was carried out in a roller with a diameter...

Embodiment -2

[0067] The amount of binder is 3%-5% fly ash. Add water 5%-7.5%, granulation time 7-8 minutes.

[0068] The particle strength before humidity treatment is 1.7-2.9 Kg / particle, and the particle strength after 24 hours treatment under 77% humidity is 0.7-1.6 Kg / particle, and the yield is 60%-67%.

Embodiment 3

[0070] As in Example 2, 4% fly ash+1% calcium hydroxide is used. Granulation time 7 minutes. The particle strength before humidity treatment is 2.6-3.5Kg / particle, and the particle strength after humidity treatment is 1.6-1.8Kg / particle, and the yield is between 52%-74%.

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PUM

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Abstract

Provided herein is a method of preparing polyhalite particles from fine, dry polyhalite powder, the method comprising: preparing a binder-water mixture and combining the binder-water mixture with the mixing polyhalite powder; continuously adding water to the mixer to provide polyhalite material; discharging the polyhalite material from the mixer and introducing the material into a fluidized bed; introducing the material drying; and sieving the material to receive particles between 1.4 mm and 4.75 mm in size.

Description

[0001] Inventors: Khalil Abu-Rabeah, Natalia Geinik, Ruben Socolovsky, AyoubAlhowashla, Yacov Levy, Marina Dekov, Joseph Lati, Ofir Cohen [0002] Field of Invention [0003] The invention relates to the field of fertilizers, in particular to the preparation of polyhalite granules used as fertilizers. [0004] Background of the Invention [0005] To grow properly, plants need nutrients (nitrogen, potassium, calcium, zinc, magnesium, iron, manganese, etc.), which are usually found in the soil. Fertilizers are sometimes required to achieve desired plant growth as these enhance plant growth. [0006] This plant growth is achieved in two ways, the traditional way is by providing nutrients with additives. The second mode in which some fertilizers work is to enhance soil availability by altering its water retention and aeration. Fertilizers typically provide three main macronutrients in varying proportions: [0007] Nitrogen (N): Leaf growth; [0008] Phosphorus (P): development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J2/28C05G3/00C05D1/00C05D3/00C05D5/00C05F11/00B29B9/12C05G3/30C05G3/40
CPCC05D1/00C05D3/00C05D5/00C05F11/00C05G3/00C05G5/40C05G5/12B29B9/12
Inventor K·阿布拉比亚O·科恩A·阿尔霍瓦什拉N·盖因克R·索科鲁斯凯Y·雷维M·德科夫J·拉蒂
Owner ICL EUROPE COOPERATIEF U A