Comprehensive research of the effect of potassium and sodium nitrates on arsenopyrite in a intermediate product of enrichment

The object of the research was the intermediate product of ore enrichment from the mining and processing plant “Solnechny”, which is a polymineral raw material. The problem of removal of arsenopyrite and arsenic compounds and obtaining pure tin from this intermediate product of beneficiation is acute. Previously, the interaction of arsenopyrite with potassium and sodium nitrates was modeled in the program complex Thermo-Calc and the optimal composition and ratio of these nitrates for the qualitative course of the impact reaction on arsenopyrite were revealed. An alternative method of arsenic concentration reduction in polymineral raw materials was proposed. Laboratory studies of the effect of potassium nitrate and sodium nitrate on arsenopyrite were carried out in order to verify the results of computer modeling: thermogravimetric (TG) and differential thermal analysis (DTA). The experiment on influence of potassium and sodium nitrate mixture confirmed the data of thermodynamic modeling, but also revealed new compounds formed during the experiment. The elemental composition was determined by micro-X-ray spectral analysis method, and then the mineralogical composition of the original milled beneficiation intermediate product and the intermediate product with the addition of potassium and sodium nitrate was analyzed, and the compositions were analyzed after heat treatment at 700 ℃.

Keywords: arsenopyrite, pyrite, arsenic, cassiterite, minerals, scanning electron microscopy, potassium nitrate, sodium nitrate.
For citation:

Doroshenko E. M., Rasskazova A. V., Kim E. D., Panshin I. О. Comprehensive research of the effect of potassium and sodium nitrates on arsenopyrite in a intermediate product of enrichment. MIAB. Mining Inf. Anal. Bull. 2023;(12-1):40—52. [In Russ]. DOI: 10.2501 8/0236_1493_2023_122_0_40.

Acknowledgements:

The authors would like to thank Ermakov Mikhail Alexandrovich for help in obtaining data for the study on Hitachi SU-70 scanning electron microscope, Doroshenko Kirill Vladimirovich for assistance in thermodynamic modeling, as well as JSC “ORK” for providing samples of intermediate product of cassiterite concentrate enrichment.

Issue number: 12
Year: 2023
Page number: 40-52
ISBN: 0236-1493
UDK: 622.7.051.7
DOI: 10.25018/0236_1493_2023_122_0_40
Article receipt date: 05.10.2023
Date of review receipt: 23.10.2023
Date of the editorial board′s decision on the article′s publishing: 10.11.2023
About authors:

Doroshenko E. M., orcid: 0009−0008−5626−9830, Postgraduate student of the Higher School of Industrial Engineering, Pacific National University (PNU), Khabarovsk, Russia, dorekami@yandex.ru;
Rasskazova A. V., orcid: 0000−0002−6998−8120, Cand. Sci. (Eng.), Associate Professor of the Higher School of Industrial Engineering, Pacific National University (PNU), Khabarovsk, Russia, annbot87@mail.ru;
Kim E. D., Cand. Sci. (Eng.), Associate Professor of the Higher School of Industrial Engineering, Pacific National University (PNU), Khabarovsk, Russia, jenya1992g@mail.ru;
Pan’shin I. O., Laboratory assistant of the Department of Innovation Policy and Development of the Pacific National University, Khabarovsk, Russia, yojick2674@yandex.ru.

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