06-03-2022, 11:26 PM
Concerning rock salt. Edibility depends on impurities in the source deposit and if it was treated to help it melt ice. Water softening salt, not sure, seems like it would be edible.
Rock salt is often mined, crushed, screened and sent on it's way, but table salt has to be nearly pure, 97% to 99% sodium chloride, NaCl.
It seems to me you should be able to make a brine and filter out most of the impurities, then evaporate it into salt again. This is a method Morton Salt uses, but with large volume industrial machines.
https://www.mortonsalt.com/salt-producti...rocessing/
Rock salt is often mined, crushed, screened and sent on it's way, but table salt has to be nearly pure, 97% to 99% sodium chloride, NaCl.
It seems to me you should be able to make a brine and filter out most of the impurities, then evaporate it into salt again. This is a method Morton Salt uses, but with large volume industrial machines.
Quote:Vacuum Evaporation Method
Another method of salt production used by Morton Salt is the evaporation of salt brine by steam heat in large commercial evaporators, called vacuum pans. This method yields a very high purity salt, fine in texture, and principally used in those applications requiring the highest quality salt.
The first part of the operation is known as solution mining. Wells are drilled from several hundred to 1,000 feet apart into the salt deposit. These wells are connected via lateral drilling, a recently developed technology. Once the wells are connected, the solution mining operation begins: water is pumped down one well, the salt below is dissolved, and the resulting brine is forced to the surface through the other well. It is then piped into large tanks for storage.
https://www.mortonsalt.com/salt-producti...rocessing/