When processing any material, it is important to recognize key characteristics that will affect manufacturing operations and the product generated. Even well-known minerals such as gypsum require testing on a case by case basis to ensure quality results. The following list outlines key material characteristics that affect gypsum processing.
1. Abrasive
Mined gypsum is a somewhat abrasive material. As a result, robust equipment must be used when processing gypsum ore. Rotary dryers are an ideal solution for many types of ore, as they are rugged pieces of equipment easily customized with heavy-duty linings that defend against erosion. Rotary dryers are also beneficial in applications that require a reduction in the gypsum ore’s moisture content. The tumbling movement rounds and dries the gypsum, preparing the material for future processing steps.
2. Dust and Clumps
When granulated properly, pelletized gypsum is much easier to handle versus powdered gypsum. However, clumping and dusting issues may occur when drying and pelletizing powdered gypsum. In order to avoid such issues, equipment such as pin mixers, disc pelletizers, and rotary dryers are used to process gypsum into pellets.
- A pin mixer pre-conditions the gypsum material using a binder solution and the rotational mixing motion of the pins.
- A disc pelletizer naturally creates round pellets through the rotating motion of the disc, gradually growing and processing gypsum into the desired pellet size.
- A rotary dryer applies a tumbling action to the pelletized gypsum. This movement dries the material and naturally rounds and polishes the gypsum pellets.
3. Variability
The make-up of naturally occurring gypsum may vary based on the region from which it was mined. Because of these variations, different types of gypsum may require more processing time or additional binder. Testing is always recommended to confirm that the suggested gypsum processing methods will deliver the necessary results.
Synthetic gypsum is produced as a by-product of industrial processing. As a result, there is a wide range of variability with this material. Even more so than natural gypsum, synthetic gypsum requires testing to determine the best processing methods for this unique material.
FEECO has over 60 years of experience testing material, producing custom equipment, and designing processes tailored to the unique needs of materials such as gypsum. Whether you’re processing natural or synthetic gypsum, contact FEECO today to learn more about our extensive understanding of the gypsum processing industry.