【摘要】 研究以渣场酸性池水和磷石膏浮选脱硅回水作为部分二洗水进入磷酸萃取系统的评价试验。结果表明,产品w（P₂O₅）为25%左右时,磷矿分解率>96.5%,洗涤率>99%,石膏（干基）过滤强度>600 kg/（m²·h）;吨P2O5消耗磷矿粉（w（P₂O₅）30%）3.46 t,硫酸（w（H₂SO₄）100%）2.84 t;渣场池水和磷石膏浮选脱硅回水对湿法磷酸生产过程中的分解率、洗涤率以及过滤强度没有影响;浮选脱硅回水比渣场酸性池水更容易使磷酸萃取过程中产生泡沫,添加一定量消泡剂后,可达消泡效果。更多还原

【Abstract】 The evaluation test of phosphogypsum flotation desilication water and residue field water as part ofthe second washing water entering phosphoric acid extraction system is studied. The results show that, the w（P₂O₅） of product acid is 25% or so, the decomposition rate of phosphate rock is above 96.5%, the washing rateis above 99%, the strength of gypsum filter is above 600 kg/（m²· h）（dry basis）;When 1 t P₂O₅ is produced,the consumption of phosphate rock powder（w（P₂O₅）30%）and sulfuric acid（w（H₂SO₄）100%） are respectively 3.46 t and 2.84 t. There is no effect for the process of decomposition rate,washing rate and filter intensity. Thedesilication water produces bubbles more easily than the residue field water, and the bubbles can be eliminatedby adding a certain amount of defoaming agent.更多还原