Abstract
The research aims to reveal the structure, phase, and elemental content of manganese ores from deposits—Bogach (Karaganda region, Kazakhstan) and Zhaksy (Akmola region, Kazakhstan). The samples were studied with scanning electron microscopy with energy dispersive analysis (SEM-EDA), X-ray diffractometry (XRD), Infra-red spectroscopy (IRS). During the research, structural peculiarities, elemental and phase content of the samples have been revealed. The mineral matter of the Bogach deposit ore mainly consists of hollandite, cryptomelane, braunite, calcite, bixbyite, quartz. The Zhaksy deposit ore includes quartz, hollandite, bixbyite, pyrolusite. Bogach ore includes (wt.%) C(10.68), O(32.00), Mn(43.26), Ca(6.36), Si(3.51), Na(0.52), Al(1.13), Mg(0.69), K(1.85). The elemental content of Mn in Zhaksy ore is two times lower. Zhaksy ore includes (wt.%) C(23.77), O(32.1), Mn(21.81), Si(10.52), Al(5.13), K(1.21), Fe(5.47). The obtained data of the conducted spectral analysis indicate that both samples represent a polymineral heterogeneous structure. Conducted research allows to conclude, that by phase-elemental content the Bogach ore can be used for obtaining trimanganese tetraoxide pigment similar to manganese ores from West Sumatera deposit (Indonesia) by top-down method using grinding with a milling tool and high-temperature sintering.
Highlights
Trimanganese tetraoxide is the chemical compound with the formula Mn3O4
Anticorrosive compounds containing Mn3O4 form a thin layer on the metal surface and improve its resistance to different agents such as water, air and other chemical compounds
The results demonstrated that some phases were forming and vanishing during the calcination process in the air, such as calcium ferrites, calcium oxide, and bixbyite
Summary
Trimanganese tetraoxide is the chemical compound with the formula Mn3O4. It is known as hausmannite [1]. Hausmannite belongs to a group of the Mn2+Mn23+O4 oxides. These oxides include Mn(II) and Mn(III) in a tetragonal crystal. Hausmannite has a lot of applications in the industry. The application of hausmannite depends on the purity and granulometric fraction of the sample. A high disperse hausmannite can be used in steel production as an alloying additive [3]. This alloying additive is used to slow down the corrosion processes in metals. Hausmannite can be used as a colorant, a nonmetallic paint or varnish [4].This treatment is highly effective especially on the metals initial damage stage [5]
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