Mechanochemical Conversion of Domestic Celestite Mineral to SrC2O4 in The Ammonium Oxalate Media

Özet

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 compounds as contamination. Strontium is used as a primary raw material in the production of oxalate superconducting material and luminescence. In this study, in situ conversion of SrSO4 into SrC2O4.H2O by ammonium oxalate is investigated and the effects of rotational speed, ball / sample ratio and (NH4)2C2O4 / SrSO4 mole ratio on the conversion reaction were determined. It was found that the conversion of SrSO4 to SrC2O4.H2O was increased with increasing 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.