The article contains sections titled: 1. Introduction 1.1. Occurrence 1.2. History 2. Potash Salt Deposits 2.1. Minerals 2.2. Geology of Potash Deposits 3. Mining of Potash Salts 3.1. Shaft Mining 3.2. Extraction, Conveying, and Haulage 3.3. Solution Mining 4. Treatment of Potash Ores 4.1. Intergrowth and Degree of Liberation 4.2. Grinding 5. Potassium Chloride 5.1. Properties 5.2. Production by Crystallization from Solution 5.2.1. Phase Theory 5.2.2. Hot Leaching Process 5.2.3. Processing of Carnallite 5.2.4. Equipment 5.3. Flotation 5.3.1. Potash Ores Suitable for Flotation 5.3.2. Carrier Solutions 5.3.3. Flotation Agents 5.3.4. Theory 5.3.5. Flotation Equipment 5.3.6. Processes 5.4. Electrostatic Separation 5.4.1. Theoretical Basis 5.4.2. Equipment and Processes 5.5. Heavy‐Media Separation 5.6. Debrining and Drying 5.7. Process Measurement and Control 5.8. Waste Disposal and Environmental Aspects 5.9. Granulation 5.10. Quality Specifications 5.11. Toxicology and Occupational Health 5.12. Economic Aspects and Uses 6. Potassium Sulfate 6.1. Properties 6.2. Raw Materials 6.3. Production 6.3.1. From Potassium Chloride and Sulfuric Acid (Mannheim Process) 6.3.2. From Potassium Chloride and Magnesium Sulfate 6.3.3. From Potassium Chloride and Langbeinite 6.3.4. From Potassium Chloride and Kainite 6.3.5. From Potassium Chloride and Sodium Sulfate 6.3.6. From Potassium Chloride and Calcium Sulfate 6.3.7. From Alunite 6.3.8. From Natural Brines and Bitterns 6.4. Granulation 6.5. Quality Specifications 6.6. Toxicology and Occupational Health 6.7. Economic Aspects and Uses 7. Potash ‐ Magnesia 8. Production of Potassium Salts from Other Raw Materials 8.1. The Dead Sea 8.2. The Great Salt Lake 8.3. Searles Lake 8.4. Other Sources 9. Storage and Transportation 10. Analysis of Potassium Compounds 11. Potassium Hydroxide 11.1. Properties 11.2. Production 11.3. Quality Specifications 11.4. Economic Aspects and Uses 12. Potassium Carbonate 12.1. Properties 12.2. Production 12.3. Quality Specifications and Analysis 12.4. Storage and Transportation 12.5. Economic Aspects and Uses 13. Potassium Hydrogencarbonate 13.1. Properties and Production
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