Size enlargement , solids crystallization

Producing a granular solid matter possible by size enlargement (agglomeration, melt solidification [pastillation, prilling], and crystallization) or by size reduction (crushing). (See also compaction/granulation.)... 

As a final example of the use of pressure agglomeration for minerals, various applications of roller presses in the salt (sodium chloride) industry shall be discussed. The technology is used for the size enlargement of rock salt fines and of crystallized byproduct salt from the concentration of potassium chloride and for potassium chloride itself and for other salts. All salts deform easily under pressure and, while becoming corrosive in the presence of water, do not cause much mechanical wear unless hard solid impurities or contaminants are present, which happens rather infrequently. 

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