磷石膏转化法制硫酸钾第二阶段反应条件的正交实验研究

Optimization of the Second Reaction Stage for Potassium Sulphate Production from Phosphogypsum by Orthogonal Experimental Design

通过正交实验和单因素实验对磷石膏转化法生产硫酸钾第二阶段反应过程中的各影响因素进行了研究。通过方差分析及显著性检验，确定了过程的适宜工艺条件：反应温度５０℃，反应时间６０ｍｉｎ，硫酸铵初始浓度３８％，配料比（ＳＯ ／２Ｋ＋）１：１。

The factors affecting the second reaction stage ofpotassium sulphate production from phosphogypsumwere examined by orthogonal design and single factortest. On the basis of variance analysis and significancetest, the optimum reaction conditions were determinedas follows: temperature 50 ℃, resident time 60 min, initial (NH4 )2SO4 concentration 38% and feed ratio(SO42 /2K+ ) 1: 1.