Influence of nine factors on colourity of phosphoricacid in production of phosphoric acid by furnace precess was investigated,and the methods reducing the colourity of phosphoric acid were present.

• 通过生产实践和前人的研究，对热法磷酸生产中影响磷酸色度的9种原因进行了分析探讨，并提出了相应的解决方法。