用化学试剂模拟湿法磷酸，将湿法磷酸中Fe³⁺、Mg²⁺、Al³⁺、SO₄^2-杂质的质量分数定在某一固定值，而在一定范围内改变其中1种待考察杂质的质量分数，对其氨化料浆进行絮凝沉降。研究结果表明，Fe³⁺、Al³⁺质量分数对氨化料浆絮凝沉降的影响有相似的规律，随着Fe³⁺、Al³⁺质量分数的增加，絮凝沉降速率均是先变快后变慢，超过一定范围后，料浆几乎不沉降。Mg²⁺质量分数在一定范围内随着镁离子质量分数的增大，絮凝沉降变化不大。SO₄^2-的质量分数越高，絮凝沉降速率越小。

The wet-process phosphoric acid is stimulated with pure chemical reagents.The concentrations of impurities such as Fe³⁺,Mg²⁺,Al³⁺ and SO₄^2- in the simulating wet-process phosphoric acid are fixed while concentration of the impurity to be studied is varied in a certain range,and then effects of impurities on the flocculation settlement efficiency in the ammoniated slurry of the simulating wet-process phosphoric acid are studied.Results show that concentration of Fe³⁺ and Al³⁺ have the similar effect.With the increase of content of Fe³⁺ or Al³⁺,the flocculent settling rate becomes faster at first,then slows down.When the content of Fe³⁺ or Al³⁺ exceeds a range,the slurry is hardly settling.With the increase of content of Mg²⁺ in a certain range,the flocculent settling rate has little change.With the increase of content of SO₄^2-,the settling rate becomes slower.

王佩(1992-),女,硕士研究生,研究方向为磷资源的综合利用,412718256@qq.com