This article is devoted to the study of deep processing of synnyrite, a potassium-rich aluminosilicate raw material of the Kalyumnoye deposit of the Synnyr alkalic rock massif (the Republic of Buryatia, Russia) to produce valuable agricultural (potassium magnesium sulfate) and technical (magnesium aluminate spinel) products. The study demonstrated the promise of this method of processing synnyrite, based on thermochemical activation of the original ore with magnesite instead of limestone, followed by sulfuric acid leaching. This approach significantly reduces the cost of the thermochemical process and provides an additional useful product MgSO₄·6H₂O, which recuperates the initial magnesium additive and minimizes solid waste generation. This paper also presents a new method of processing alum KAl(SO₄)₂ obtained from synnyrite, based on sintering with potassium carbonate K₂CO₃ and brucite Mg(OH)₂ (or magnesium oxide) to produce potassium magnesium sulfate K₂Mg(SO₄)₂ and magnesium aluminate spinel MgAl₂O₄. The samples were characterized by DSC, chemical analysis, and XRD using the Rietveld method in TOPAS 4.2 software.

本文致力于研究Synnyr碱性岩体（ 俄罗斯布里亚特共和国）Kalyumnoye矿床富含钾的硅铝酸盐原料Synnyrite深加工生产有价值的农业（硫酸钾镁）和技术（铝酸镁尖晶石）产品。该研究证明了这种处理菱镁矿的方法的前景，该方法基于用菱镁矿而不是石灰石对原始矿石进行热化学活化，然后进行硫酸浸出。这种方法显着降低了热化学过程的成本，并提供了额外的有用产品 MgSO ₄ ·6H ₂O，它可以回收最初的镁添加剂并最大限度地减少固体废物的产生。本文还提出了一种新的处理方法，该方法是用碳酸钾 K ₂ CO ₃和水镁石 Mg(OH) ₂（或氧化镁）烧结以生产硫酸镁钾 K ₂ Mg的方法，从铁镁石中提取明矾 KAl(SO ₄ ) ₂ 。 (SO ₄ ) ₂和铝酸镁尖晶石 MgAl ₂ O ₄。使用 TOPAS 4.2 软件中的 Rietveld 方法通过 DSC、化学分析和 XRD 对样品进行表征。