介绍了一种H₂S循环脱湿法磷酸重金属的新工艺，通过对比分析了H₂S循环脱湿法磷酸重金属新工艺与 传统Na₂S溶液脱重金属工艺的脱除效率、工艺安全性、循环经济性以及技术经济性，结论如下：H₂S循环脱湿法磷 酸重金属新工艺可以实现脱A松后折85% H₃PO₄中A松指标降至0.5mg/kg；本工艺拥有较高的工艺安全性、循环 经济性、技术经济性，可使原料Na₂S和NaOH的消耗量优化倍数达到了117、5.8倍，S元素的总利用率为94.5%，H₂S循环脱重金属新工艺的尾气量由传统工艺的10400m³/kg（以A松计）减至4800m³/kg（以A松计）。

A new process of H2S cyclic wet process phosphoric acidheavy metal removalis introduced. The removal efficiency,process satety,cyclic and technical economy of the new process of H₂S cyclic wet process phosphoric acidheavy metal removal and the traditional process of Na₂S soution heavy meta. remova are compared and anaiyze.The concusions are as folows:The new process can reduce As index to 0. 5mg/kg as ir H₃PO₄ by 85% after As remova, This process eniovs high process saiety,cvclics.technica economy, which can make the consumption optimiza tion of raw materials Na₂S and Na0H reach 117 and 5.8 times respectively,and the total utilization rate of S element is 94. 5%, The exhaust volume of the new process is reduced from 10,400 m³/kg(As) in the traditional process to 4 800 m³ /kg(As) in the new one.