Gypsum is commonly pelletized for use as a soil amendment. This presentation goes over the basics of pelletizing gypsum, gypsum pelletizing equipment, and the many benefits that pelletizing gypsum for use as a soil amendment has to offer.

1. Pelletizing
Experts in process design and material
processing for over 60 years.
Gypsum

2. Gypsum,
both natural and synthetic, is commonly
pelletized for use as a soil amendment.
Pelletizing gypsum offers many benefits…

3. Benefits
of Pelletizing Gypsum

4. - Dust-free product handling

5. - Dust-free product handling
- Improved product formulations

6. - Dust-free product handling
- Improved product formulations
- Simplified transportation

7. - Dust-free product handling
- Improved product formulations
- Simplified transportation
- More accurate and easier application

8. - Dust-free product handling
- Improved product formulations
- Simplified transportation
- More accurate and easier application
- Mitigation of product lost as dust

9. Gypsum
Pelletizing Basics

10. Pelletizing gypsum forms a strong pellet that
is capable of withstanding handling, but can
still break down quickly in standard field
conditions.

11. Pelletizing is carried out via tumble growth
agglomeration, utilizing three main pieces of
equipment: a pin mixer, disc pelletizer, and
rotary dryer.
Pin Mixers Disc Pelletizers Rotary Dryers

12. Gypsum pelletizing consists of three main
steps:
Pre-conditioning

13. Gypsum pelletizing consists of three main
steps:
Pre-conditioning Pelletization

14. Gypsum pelletizing consists of three main
steps:
Pre-conditioning Pelletization Drying

15. Pre-Conditioning

16. In the pre-conditioning stage,
gypsum is conditioned in a
pin mixer.

17. Gypsum fines are fed into the pin mixer, with
the addition of a binder.

18. Gypsum fines are fed into the pin mixer, with
the addition of a binder.
The pin mixer uses an intense spinning
action to reduce air and water volume
between particles, creating densification in
the material.

19. Pelletization

20. After conditioning,
the densified gypsum
is fed onto a
disc pelletizer,
or “pan pelletizer.”

21. On the pelletizer, the gypsum rolls
against itself, creating uniform, round
pellets. Binder is again added to assist
in pellet formation and to create a
pellet with desired characteristics.

22. Once pellets have reached desired size,
they exit the pan and are ready for product
finalization.

23. Drying

24. Since moisture is added during the
pelletization process, drying is necessary. A
drying step finalizes the gypsum pellet,
reducing moisture and creating a final, dry
pellet.

25. This is commonly carried out in a rotary
dryer, an industrial dryer valued for its robust
build, longevity, and ability to accept
variance in feedstock.

26. In a rotary dryer, gypsum pellets tumble
through the drum, with flights picking up
the material and showering it through a
stream of hot air or combustion gas.

27. In a rotary dryer, gypsum pellets tumble
through the drum, with flights picking up
the material and showering it through a
stream of hot air or combustion gas.
This efficiently dries and hardens the pellets
into their final form.

28. Simplified Pelletizing Diagram
1. Raw feed
2. Pin/Paddle Mixer
3. Binder Feed
4. Spray Rate
5. Disc Pelletizer
6. Feed Onto Pelletizer
7. Binder Feed
8. Liquid Spray System
9. Transfer Conveyor
10. Rotary Dryer
11. Vibrating Screen
12. Oversize Mill
13. Recycle
14. Surge hopper

29. Pelletized gypsum is a premium product that
offers improved handling and use, faster
nutrient delivery, and mitigation of dust-
related issues.
Conclusion

30. has been working with gypsum for over 60
years, providing testing, process design
and development, and manufacturing of
gypsum processing equipment.
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FEECO

31. Want to learn more?
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Gypsum Processing
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