The fluidized bed drying results in non-uniform salt mixture particles
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The fluidized bed drying process is used to treat mixed salts (with sodium chloride as the main component and some sodium sulfate present). The dry salt that comes out of the silo contains slightly larger particles; tests show that the main component in these particles is sodium sulfate, which is the opposite of what’s found in the fine salt. What could be the reason for this?
This may be due to the different physical properties of sodium chloride and sodium sulfate during the fluidized bed drying process. The melting points, solubilities, and heat absorption rates of sodium chloride and sodium sulfate may differ, leading to different behaviors during the drying process. Fluidized bed drying may lead to more uniform drying of lighter or finer particles (such as sodium chloride), while heavier or coarser particles (such as sodium sulfate) may clump together to form larger particles. It is recommended to adjust the parameters of the drying process such as temperature, humidity, and air flow rate, or to mix the raw materials more evenly before drying, in order to improve the uniformity of the product. .