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How does solution mining recover potash from underground deposits?
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![A periodic table element box for potassium shows atomic number 19, symbol K, atomic weight 39.0983, electron configuration [Ar]4s1, and name potassium. Icons indicate it is an alkali metal, solid at room temperature, body-centered cubic crystal structure, and has strongly basic higher-valence oxides. A key explains the symbols for alkali metals, solid state, body-centered cubic structure, and strong basicity.](https://cdn.britannica.com/81/22381-050-E3372C94/properties-Potassium.jpg)
potassium
Properties of potassium.
Solution mining is a method used to extract potash from underground deposits by dissolving the minerals in place.1
The process involves the following steps:
- Injection: Water or brine is injected through a borehole into the underground evaporite formation containing the potash-bearing minerals.21
- Dissolution: The injected liquid dissolves the target minerals, creating a potassium-rich solution within the underground cavity.21
- Extraction: This resulting solution is then pumped to the surface.1
- Recovery: Once at the surface, the potash is recovered from the brine through the process of recrystallization.1
This technique is distinct from traditional underground mining, which utilizes mechanical boring and explosives to physically remove ore from the earth. Solution mining is particularly effective for accessing deep deposits and can be enhanced by connecting adjacent wells to increase production capacity.12