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通过对回转圆筒干燥器进行技术改造，实现了三元复肥的内运料内分级喷浆造粒干燥由此生产出的三元复肥具有：钾含量高、总养分高等特点，能促进经济类农作物高产．
The technological transformation of the rotary drum dryer realizes the grading and drying of the gravimetric slurry in the in-feed material of the ternary compound fertilizer, which has the characteristics of high potassium content and high total nutrients, and can promote Economic crops high yield.