Water is recovered after neutralization and separation, suction pressure drying system is adopted for a lower loss and the total P recovery rate is increased to 74%, SSP consumption is decreased to 3.1 t/t and water consumption to 2.5 t/t.

• 中和分离后水回收使用 ；采用负压干燥系统 ；减少机械损失 ；使总磷收率提高到74%25 ；吨产品普钙消耗降至 3.；1吨；水耗降至 2