湿法稀磷酸预处理实验研究

Abstract

Abstract: In allusion to the problems，such as the hard filtration of heavy metal-removed concentrated phosphoric acid in the process of wet process phosphoric acid production，the new technology‘Aged dilute phosphoric acid heavy metal removal-fil- tration-concentration-defluorination-subsequent product process’ was put forward.Results showed，when sodium sulfide dosage was 11 times of the calculation amount of computation，reaction temperature of 50 ℃，the reaction time of 30 min，and stirring speed of 400 r/min，the arsenic′s mass fraction in the clear heavy metal-removed acid was 7×10-6~8×10-6，met the re- quirement of below the 1.0×10-5.

Key words: wet process phosphoric acid, heavy metals, sodium sulfide

CLC Number:

TQ126.35

HE Bin-Bin, ZHANG Hui, ZHOU Qiong-Bo, FANG Shi-Xiang, FU Ying. Experimental study on pretreatment of dilute wet process phosphoric acid[J]. INORGANICCHEMICALSINDUSTRY, 2016, 48(8): 55-.

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National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Experimental study on pretreatment of dilute wet process phosphoric acid

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