Scattered throughout the world there are a large number of brine sources that contain commercial tonnages of potash. A few of them have been operated since the earliest days of the industry, but often for only short periods and/or on a limited scale. A problem with their production has been that the potash content is always weak (usually only about 1–2% KCl), and thus a solar evaporation, or expensive plant evaporation step, was first required. Also, the brines always contain many other ions, thus complicating the separation of potash from the evaporated brine or crystallized salts. Potential operators until fairly recently have been reluctant to become involved with the weather-dependent solar evaporation step, but since it has become evident that the Israeli Dead Sea operation probably produces the world’s lowest cost potash, there has recently been a renewed interest in these brine deposits. However, since the technology required for such production is far different than the standard mining-crushing-flotation steps required for buried deposits, they have usually only been developed by non-mining companies. This includes, as of 1993, large new brine operations being planned for China, Chile, Argentina (solar evaporation of solution mined brine), and elsewhere, as well as smaller tonnages as a byproduct from a number of other facilities (from lithium, soda ash, salt, or other primary products).
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Brine Processing Operations
PhD Donald E. Garrett
- Springer Netherlands
- Chapter 6
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