Mechanochemical conversion of domestic celestite mineral to SrC2O4 in the ammonium oxalate media

Abstract

The main raw material used in the production of Sr metal and its compounds is SrSO₄ (celestite) mineral and Turkey has valuable Sr mineral deposits. One of the important steps in the production of Sr compounds is the production of strontium oxalate compound that does not contain alkali compunds as contamination. Strontium is used as a primary raw material in the production of oxalate, superconducting material and luminescence.

In this study, the in situ conversion of SrSO₄ into SrC₂O₄.H₂O by ammonium oxalate is investigated and the effect of rotation speed, ball / sample ratio and solution concentration on the conversion reaction has been determined. It was found that the conversion of SrO₄ to SrC₂O₄.H₂O was increased with the increase in mole ratio of (NH₄)₂C₂O₄ to SrSO₄. The maximum conversion, above 70 %, was achieved by using (NH₄)₂C₂O₄ / SrSO₄ mole ratio: 1.5, rotation speed: 500 rpm and ball / sample ratio: 13.

Keywords

• Celestite,strontium oxalate

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