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介绍在传统转鼓造粒生产复肥的基础上 ,用尿素熔融液作为氮源及转鼓造粒的液相进行造粒 ,生产三元复肥的工艺路线、运行状况、工艺控制参数和产品指标。该工艺与传统转鼓造粒相比的最大特点是 :解决了传统法用尿素为氮源 ,使烘干温度和产品水分难以控制的困难 ,产量提高近 30 % ,成球率由 40 %～ 6 0 %提高到 70 %～80 % ,产品外观改善。但在生产中要妥善解决尿素浓溶液易结晶堵塞管道以及尿素在高温下易生成缩二脲的问题
Introduction In the traditional drum granulation production of compound fertilizer, based on the urea melt as a nitrogen source and drum granulation liquid phase granulation, the production of ternary compound fertilizer process route, operating conditions, process control parameters and products index. Compared with the traditional drum granulation process, the most prominent feature of this process is that it solves the difficulty that the traditional method urea is used as a nitrogen source, making the drying temperature and product moisture difficult to control. The yield is increased by nearly 30% 6 0% increased to 70% to 80%, product appearance improved. However, the production of urea solution to properly solve the easy plugging crystallization of urea and urea at high temperature prone biuret problem