Получение углеродсодержащих огнеупорных материалов на основе хромсодержащего сырья в режиме СВ-синтеза

С.М. Фоменко; Н.Т. Рахым; С. Толендиулы; А. Акишев; M.T. Бекджанова; З. Кунес

doi:10.18321/cpc407

Authors

S.M. Fomenko Institute of Combustion Problems, Bogenbai Batyr Street, 172, Almaty, Kazakhstan
N.T. Rakhym Institute of Combustion Problems, Bogenbai Batyr Street, 172, Almaty, Kazakhstan
S. Tolendiuly Institute of Combustion Problems, Bogenbai Batyr Street, 172, Almaty, Kazakhstan; Satbayev University, Satpayev Street, 22, Almaty, Kazakhstan
A. Akishev Institute of Combustion Problems, Bogenbai Batyr Street, 172, Almaty, Kazakhstan
М.Т. Bekjanova Institute of Combustion Problems, Bogenbai Batyr Street, 172, Almaty, Kazakhstan
Z. Kunes Institute of Combustion Problems, Bogenbai Batyr Street, 172, Almaty, Kazakhstan; Al-Farabi Kazakh National University, 71 Al-Farabi ave., Almaty, Kazakhstan

DOI:

https://doi.org/10.18321/cpc407

Keywords:

chromite and zircon concentrates, carboncontaining refractory materials, MAX-phases, selfpropagating high-temperature synthesis (SHS)

Abstract

The paper describes the study of technologies and the synthesis of composites containing hightemperature carbides and MAX-phases, which increase the technical and chemical properties of refractories. Using the unique properties of chromite and zircon concentrates, carboncontaining refractory materials were obtained by the method of self-propagating high-temperature synthesis (SHS). Experimental studies are analyzed and summarized. The phase and chemical composition of the obtained carbon-containing composites was determined and the strength characteristics were measured. The most stable and useful ZrC and SiC were formed in the zircon concentrate, and the chromite concentrate has a high oxidizing ability, which allows reaching high synthesis temperatures. The study of the obtained composites showed that in the process of SHsynthesis in a carbon medium, MAX-phases of the Cr_xSi_yC_z, Cr₂SiC, Cr₅Si, SiC type were formed, which enhance the technical and chemical properties of refractory materials. The optimal composition of a refractory material based on a combination of chromite and zircon concentrates, containing 15 wt.% graphite and 18 wt.% aluminum powder, at which a maximum strength was observed (20-25 MPa), had been determined.

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