It is possible to use roll crusher for dry coarse salt, and roll crusher has advantages in particle size uniformity, production energy consumption and maintenance cost in crushing dry coarse salt.
The following is a detailed description of the advantages of roll crusher for crushing coarse salt.

Dry coarse salt crusher:

Roll crusher is suitable for brittle materials with compressive strength ≤160MPa, and the hardness of coarse salt is low (Mohs hardness is about 2-3), which is much lower than the upper limit of the equipment load. Its extrusion-shear crushing principle can effectively handle such low and medium hardness materials. And the discharge size is uniform (1-20mm adjustable).  The roll crusher controls the discharge size by adjusting the roll spacing. Which is suitable for crushing coarse salt to medium or fine crushing level (e.g. 1-3mm). The dry coarse salt has low moisture content (<6%), which will not cause the roll surface to stick or clog due to stickiness.  And it meets the requirements of the roller machine for materials with low moisture content.

Dry coarse salt crusher Advantages and Notes

Advantages

Low over-crushing rate: Roller squeeze crushing reduces the generation of fines.  Making it suitable for scenarios where particle integrity needs to be preserved (e.g. industrial salt preparation).
Energy efficient: 20-30% lower energy consumption compared to impact crushers, less dust and noise pollution.
Convenient maintenance: Modular design makes roll skin replacement easy, and wear-resistant materials (e.g. high manganese steel) extend service life.

Precautions

Removal requirements: Metal impurities that may be mixed in the salt need to be removed before crushing to avoid damaging the roll surface or triggering overload protection.
>Regular maintenance: Although the abrasiveness of coarse salt is low, it is still necessary to check the wear of the roll surface regularly, and adjust the roll spacing or replace the roll skins in time.