Compacted Polyhalite and a process for the production thereof

A process for the compaction of Polyhalite, comprising:

• mixing a feed of polyhalite with an inorganic binder suspension or solution in a mixer to yield a mixture;
• compacting said mixture in a compactor to yield masses;
• crushing said masses in a crusher to yield particles;
• and
• screening said particles in a screener to yield particles in three different sizes:
• oversized fine particles which undergo a second crushing process and are retuned to said screener for screening,
• undersized fine particles which are transferred to said mixer for further mixing and compacting, and
• desired size fine particles between 1-6 mm, which are transferred to a polish screener for glazing and oiling,
• wherein said process is a wet process and said granule is comprised of said Polyhalite, said binder and water.