首页|(107779)A new method of obtaining potassium magnesium sulfate and magnesium aluminate spinel from synnyrite, a potassium-rich aluminosilicate raw material
(107779)A new method of obtaining potassium magnesium sulfate and magnesium aluminate spinel from synnyrite, a potassium-rich aluminosilicate raw material
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NSTL
Elsevier
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 signif-cantly reduces the cost of the thermochemical process and provides an additional useful product MgSO_4-6H_2O, which recuperates the initial magnesium additive and minimizes solid waste generation. This paper also presents a new method of processing alum KAl(SO_4)_2 obtained from synnyrite, based on sintering with potassium carbonate K_2CO_3 and brucite Mg(OH)_2 (or magnesium oxide) to produce potassium magnesium sulfate K_2Mg(SO_4)_2 and magnesium aluminate spinel MgAl_2O_4. The samples were characterized by DSC, chemical analysis, and XRD using the Rietveld method in TOPAS 4.2 software.
NSTL
Elsevier
