Archives of Metallurgy and Materials

Institute of Metallurgy and Materials Science of Polish Academy of Sciences
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A STUDY ON THE SYNTHESIS OF LITHIUM CARBONATE (Li2CO3) FROM WASTE ACIDIC SLUDGE

  • DONG HYEON CHOI (PUKYONG NATIONAL UNIVERSITY, DEPARTMENT OF METALLURGICAL ENGINEERING) ;
  • JEI PIL WANG (PUKYONG NATIONAL UNIVERSITY, DEPARTMENT OF METALLURGICAL ENGINEERING)
  • Published : 20200000
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Abstract

In this study, the synthesis of lithium carbonate (Li2CO3) powder was conducted by a carbonation process using carbon dioxide gas (CO2) from waste acidic sludge based on sulfuric acid (H2SO4) containing around 2 wt.% lithium content. Lithium sulfate (Li2SO4) powder as a raw material was reacted with CO2 gas using a thermogravimetric apparatus to measure carbonation conditions such as temperature, time and CO2 content. It was noted that carbonation occurred at a temperature range of 800℃ to 900℃ within 2 hours. To prevent further oxidation during carbonation, calcium sulfate (CaO4S) was first introduced to mixing gases with CO2 and Ar and then led to meet in the chamber. The lithium carbonate obtained was examined by inductively coupled plasma-mass spectroscopy (ICP-MS), X-ray diffraction (XRD) and scanning electron microscopy (SEM) and it was found that of lithium carbonate with a purity above 99% was recovered.

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Acknowledgement

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2019R1F1A1049405)