Analysis of change of dislocation density in pyrite grains in heating by super-high-frequency radiation

Microwave effect discussed in the article as an alternative method of enhancing efficiency of conventional ore weakening technologies has a high potential in resource-saving ore pre-processing. The article continues the earlier published research on efficiency of super-highfrequency radiation in weakening of pyrite-bearing ore. Emphasis is laid on the change in den sity of dislocations in grains of pyrite during heating of ore in super-high-frequency field. The calculation procedure of this value is described. The information for the dislocation density calculation were the X-ray spectrum images of six samples of pyrite-bearing ore, obtained using ADP2-01 computerized X-ray diffraction equipment at different times of super-high-frequency treatment. It is found that density of dislocations in grains of pyrite experiences a sharp increase at the stage of their temperature stabilization, and the dislocation density values grow with the increasing diameter and percentage of grains, while in the further heating accompanied with the increase in the sample temperature, these values decrease. Thus, the hypothesis on an increase in the density of dislocations in the period of temperature stabilization is proved.

Vinnikov V. A., Zemlianskii G. S. Analysis of change of dislocation density in pyrite grains in heating by super-high-frequency radiation. MIAB. Mining Inf. Anal. Bull. 2025; (12):42-51. [In Russ]. DOI: 10.25018/0236_1493_2025_12_0_42.

V.A. Vinnikov, Dr. Sci. (Phys. Mathem.), Head of Chair, e-mail: evgeny.vinnikov@gmail.com, NUST MISIS, 119049, Moscow, Russia,
G.S. Zemlianskii, Graduate Student, e-mail: zemlianskygrigory@yandex.ru, ORCID ID: 0009-0008-5642-6509, NUST MISIS, 119049, Moscow, Russia.

G.S. Zemlianskii, e-mail: evgeny.vinnikov@gmail.com.

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