Potassium fertilizer production manufacturers take you to understand the main process of potassium chloride
Release time: 2023-03-16
Potassium fertilizer production manufacturers tell you that the main types of potash fertilizers are potassium chloride, potassium sulfate, potassium carbonate, potassium dihydrogen phosphate, potassium nitrate, and kiln dust potassium fertilizer. The main process of potassium chloride is mainly introduced below.
Production of Potassium Chloride:
The manufacturer of Potassium fertilizer production tells you to choose potassium halite, which is generally a mixture of potassium chloride and sodium chloride. The main methods are flotation, solution crystallization and dense media beneficiation. To produce potassium chloride from potash rock salt ore, the ore must be crushed first to make the chlorine
Potassium chloride and sodium chloride are dissociated into monomers, and the degree of dissociation varies with ore-forming conditions and production methods. different
The production method requires different crushing particle sizes, the flotation method requires a particle size below 2.4mm, and the dissolution crystallization method
The granularity requirements are relatively loose.
(1) Flotation method, using flotation agent to produce potassium chloride from potassium-containing pulp. Based on the fact that the surfaces of potassium chloride and sodium chloride crystals are wetted by water to varying degrees, when flotation reagents are added, their surface properties can be changed, the difference in surface wettability can be enlarged, and a small Potassium chloride crystals attach to the small bubbles to form bubbles and rise to the surface of the slurry. Then it is included in the flotation tank, and then filtered, washed and dried to obtain the potassium chloride product. Sodium chloride is hydrophilic and remains in the slurry as tailings. The manufacturer of Potassium fertilizer production tells you that the flotation agents used include: ① Collectors, fatty amines containing 16-18 carbon atoms. ②Regulator, to adjust the function of collector and foaming agent, to improve flotation conditions, there are generally three types: inhibitor, such as starch, aluminum sulfate, etc.; activator, such as lead salt, bismuth salt, etc.; regulator, such as carbonic acid Sodium, sodium sulfate, etc. ③ Foaming agent, pine oil and dioxane and pyran monoatomic and diatomic alcohols. The fuel consumption of the flotation method is greatly reduced compared with the solution crystallization method.
(2) Dissolution and crystallization method, which uses the difference in solubility of potassium chloride and sodium chloride in potash ore to separate at different temperatures. Heating to 100-110°C has crystallized and separated potassium chloride mother liquor (brine) to dissolve potassium salt ore, in which potassium chloride is transferred into the solution, sodium chloride and other insoluble substances remain in the insoluble residue, and the residue is separated by centrifugation , After cooling the clarified liquid, potassium chloride crystallization is obtained. The product obtained by this method is of good quality and has strong adaptability to ore. The manufacturer of Potassium fertilizer production tells you that it is suitable for potassium salt mines with small isolated particles of potassium chloride crystal monomer and relatively complex components, but it consumes a lot of energy.
Keywords: Potassium fertilizer production
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