介绍个旧市化肥厂磷石膏制硫酸钾联产三元结晶复合肥的中试试验工艺流程、主要设备、中试结果及经济评价。中试结果认为 :该工艺路线在技术经济上是可行的 ;但要求原料 KCl的 K2 O含量一定要≥ 6 0 % ,否则 ,K2 SO4产品质量不能达标 ;中试也发现某些设备存在的问题 ,有待今后改进。采用该方法生产的硫酸钾及三元结晶复合肥 ,产品质量好 ,副产品市场前景广阔。 This paper introduces the pilot process, major equipment, pilot results and economic evaluation of Pseudo-gypsum-based potassium sulfate co-production ternary compound fertilizer in Gejiu City. Pilot results show that: The process route is technically and economically feasible; but the requirement of raw material KCl K2 O content must be ≥ 60%, otherwise, K2 SO4 product quality can not be achieved; the pilot also found that some of the problems of equipment , To be improved in the future. The potassium sulfate and ternary compound compound fertilizer produced by the method have good product quality and broad by-product market.