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Method for producing controlled-release fertilizer coated with polyurethane
Method for producing controlled-release fertilizer coated with polyurethane
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机译:聚氨酯包衣控释肥料的生产方法
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摘要
A method for producing controlled-release fertilizer coated with polyurethane is provided, wherein granular fertilizer is preheated under fluidized state in a fluidized bed; the surface of the granular fertilizer is pretreated after liquid paraffin being atomized; polyol and isocyanate are mixed in a nozzle, then atomized and sprayed onto the surface of the granular fertilizer; after the reaction materials are added, liquid paraffin is added for surface release treatment.
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