Solution mining is used for the extraction of sulfur and salt from the Earth. To extract salt, water is pumped into the underground salt cavern. Here, the salt mixes with the water to form a brine solution. This solution is then easily pumped to the surface.
Sulfur mining is done by using the Frasch process. In this process, superheated water is injected into the sulfur deposit. The high temperature of the water melts the solid sulfur into a molten liquid. The liquid sulfur is then pumped to the surface (with the aid of compressed air). (010513)