A glauconitic siltstone sample with a potash content of 10% is investigated as a potential potash source. The fine grain structure comprises potash bearing phases of glauconite, muscovite, and microcline. The as-received samples showed poor dissolution ~ 5%. Planetary ball milling was attempted for the dissociation of the underlying silicate structure for the potash release, and ~ 60% potash was obtained after 12-h milling. Mechanical activation (8 h, 60% NaOH) prior to heat treatment (600 °C, 30 min) was found successful in recovering more than 95% K values from glauconite. The final residue consists mainly of quartz, indicating a complete breakdown of the silicate matrix. The mechanical activation process followed is simple, adaptable, and less energy-intensive compared to existing methods.

中文翻译：

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用于钾盐回收的海绿质粉砂岩加工

研究了钾含量为 10% 的青光岩粉砂岩样品作为潜在的钾盐来源。细粒结构包括海绿石、白云母和微斜长相的含钾相。收到的样品显示出较差的溶解度~5%。尝试使用行星球磨来分解底层硅酸盐结构以释放钾，12 小时研磨后获得约 60% 的钾。发现在热处理（600°C，30 分钟）之前机械活化（8 小时，60% NaOH）成功地从海绿石中恢复了超过 95% 的 K 值。最终残留物主要由石英组成，表明硅酸盐基质完全分解。与现有方法相比，随后的机械活化过程简单、适应性强且能耗更低。