How are soluble minerals such as halite, sylvite, and carnallite extracted and purified?

Soluble minerals such as halite, sylvite, and carnallite are extracted and purified primarily through two modern industrial methods:

• Traditional Underground Mining: In this method, the ore is extracted from deep underground evaporite deposits using mechanical boring and explosives. Once brought to the surface, the ore is crushed and refined to separate the desired minerals.1
• Solution Mining: Water or brine is injected into underground deposits to dissolve the target minerals. The resulting solution is then pumped to the surface, where the minerals are recovered through the process of recrystallization.12

Additionally, naturally occurring brines can be processed using solar evaporation. In this system, brines are channeled into ponds where evaporation concentrates the dissolved solids. As the solution reaches specific saturation points, the desired salts crystallize and precipitate out, allowing them to be harvested for further processing.32