Production of SrCO3 and (NH4)2SO4 by the dry mechanochemical processing of celestite

(NH4)2CO3 Kullanılarak Sölestinin Yaş Mekanokimyasal İşlenmesi

“…However, our previous research results showed differences in the mechanochemical conversion of celestine by dry and wet methods. Our previous research [21] results showed that the percentage of conversion of dry milled solids (SrSO4-SrCO3 mixture) was 98 after 180 min dry milling in a planetary ball mill, whereas in present our work the percentage reached about 100 less than as 75 min in a wet planetary ball mill. Similar results were also found using the RSM model [23].…”

“…As seen in Figure 2, a milling time longer than 75 min did not significantly affect conversion. Our previous research results 21 showed that the best conversion of celestine to strontianite was obtained during dry milling after a 180-min activation time of longer than wet milling time. …”

“…(Sivas, Turkey), reagent grade anhydrous (NH4)2CO3 (Sigma-Aldrich), boiled-cooled deionized water, and HCl solution were used in this study. The chemical composition of the celestine is 95.64% SrSO4, 0.35% BaSO4, 1.49% CaSO4·2H2O, and other minor minerals [21,23].…”

“…The conversion of celestine to SrCO3 increased with an increase of (NH4)2CO3. Bingöl et al (2012a) noted that "Conversion occurs dynamically as a result of mechanochemical contact between the surface of the celestine and the reaction media". The ion exchanges increase due to a high amount of (NH4)2CO3.…”

“…Mechanochemical processes use mechanical energy to activate chemical reactions and structural changes. However, the conversion of celestine with (NH4)2CO3 was firstly investigated dry and wet mechanochemical treatments by using response surface methodology in a planetary mill by the present authors [21][22][23].…”