PRODUCTION OF DICALCIUM PHOSPHATE FROM LAO CAI SECOND GRADE APATITE ORE LEACHED BY DILUTE HYDROCHLORIC ACID

Authors

  • Hiep Xuan Trinh Institute of Materials Science
  • Nguyen Xuan Truong
  • Nguyen Van Dung
  • Vu Van Trinh

DOI:

https://doi.org/10.15625/0866-708X/55/2/8312

Keywords:

Lao Cai second grade apatite, carbonate-phosphate ore, low-grade phosphate ore, dicalcium phosphate production, dilute hydrochloric acid leaching

Abstract

The production of Dicalcium phosphate from Lao Cai second grade apatite was investigated by leaching with dilute hydrochloric acid. Various factors affecting the process such as particle size, leaching time, leaching temperature, phosphate rock/hydrochloric acid ratio and mixing stirring speed and temperature have been studied to estimate the favor phosphate ore dissolution in relation to impurity. These parameters were fixed at a leaching time of 16 min, stirring speed of 400 rpm, temperature of 25 oC, hydrochloric acid concentration of 5 % and acid/phosphate ore mass ratio of 25 ml/ 5 g and particle size ≤ 450 µm. The produced aqueous acidic solution was neutralized in such a way that a pure dicalcium phosphate CaHPO4, is precipitated to be used as animal fodder. The production efficiency was 96.8 %.

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Published

2017-04-17

How to Cite

Trinh, H. X., Truong, N. X., Dung, N. V., & Trinh, V. V. (2017). PRODUCTION OF DICALCIUM PHOSPHATE FROM LAO CAI SECOND GRADE APATITE ORE LEACHED BY DILUTE HYDROCHLORIC ACID. Vietnam Journal of Science and Technology, 55(2), 209. https://doi.org/10.15625/0866-708X/55/2/8312

Issue

Section

Materials