Mfg plant for coarse grained common salt

摘要

The slurry volume is a closed type conventional evaporator with circulating brine is raised to approx 80% by the addition of hydroxides, carbonates, or basic carbonates of earth alkali metals the pH value being adjusted to be more than 8. By these additives, the formation of large crystals (e.g. 0.5 to 2 mm grain size) is made possible. The upward velocity of the brine through the salt crystal precipitation zone is raised by a constriction in the cross section.