REVEALING NEW PATTERNS IN RESOURCESAVING PROCESSING OF CHROMIUMCONTAINING ORE RAW MATERIALS BY SOLIDPHASE REDUCTION
| العنوان: | REVEALING NEW PATTERNS IN RESOURCESAVING PROCESSING OF CHROMIUMCONTAINING ORE RAW MATERIALS BY SOLIDPHASE REDUCTION |
|---|---|
| المؤلفون: | Viacheslav Bratishko, Viacheslav Borysov, Bohdan Tsymbal, Oleksii Torubara, Svitlana Borysova, Kyrylo Samoichuk, Yulia Postol, Ihor Hevko, Dmitry Milko, Dmytro Zhuravel |
| المصدر: | Eastern-European Journal of Enterprise Technologies, Vol 1, Iss 12 (103), Pp 24-29 (2020) BASE-Bielefeld Academic Search Engine |
| بيانات النشر: | Zenodo, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, 020209 energy, 0211 other engineering and technologies, Oxide, Analytical chemistry, Energy Engineering and Power Technology, Ferroalloy, chemistry.chemical_element, reduction, 02 engineering and technology, doping, Industrial and Manufacturing Engineering, chemistry.chemical_compound, Chromium, Impurity, Management of Technology and Innovation, Phase (matter), 021105 building & construction, lcsh:Technology (General), 0202 electrical engineering, electronic engineering, information engineering, lcsh:Industry, Electrical and Electronic Engineering, Dissolution, chromium-containing oxide ore raw materials, business.industry, Applied Mathematics, Mechanical Engineering, carbide, carbon thermal treatment, Microstructure, Steelmaking, Computer Science Applications, phase analysis, chemistry, Control and Systems Engineering, lcsh:T1-995, lcsh:HD2321-4730.9, business |
| الوصف: | The physical and chemical properties of products from the carbon-thermal reduction of oxide chromo-containing ore raw materials have been investigated. This is necessary to determine the parameters that reduce the loss of Cr in the processing of ore materials and the use of metallized chromium doping additives in steelmaking. It has been determined that the increase in processing temperature from 1,250 K to 1,450 K led to an increase in the manifestation of Cr23C6and (Cr, Fe)7C3. In this case, the diffraction maxima of Cr2O3corresponded to the trend of weakening and, having been treated at 1,450 K, had a residual character. Cr3C2on the diffractograms was only evident after processing at 1,250 K. The phase of the metallic Cr was traced in the samples after processing at 1,350 K and 1,450 K with the increased intensity of manifestation when the heating temperature rose. It has been determined that the microstructure of reduction products is heterogeneous with the presence of particles of different sizes and chemical compositions. The increase in the reduction temperature from 1,250 K to 1,350 K and 1,450 K and the development of reduction processes were accompanied by particle sintering with the formation of a spongy microstructure. We have detected regions that characterized inclusions and the phases where Cr content amounted to 65.10 % by weight, Fe ‒ to 16.13 % by weight. Some local areas with particles with a relatively high content of ore impurities and carbon have also been found. It follows from the results of our study that the most acceptable temperature for reduction is 1,450 K. In this case, the reduction is ensured with a predominance in the phase composition of the metal Cr and carbides (Cr, Fe)7C3and Cr23C6relative to the oxide component of Cr2O3. In this case, the lower residual carbon content was due to the higher efficiency of the reducer compared to other temperature regimes. The spongy microstructure allows for a faster dissolution compared to standard ferroalloys, thereby reducing the duration of smelting |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4f7f678b9555d05623db4be8f4fd098 https://zenodo.org/record/3702157 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c4f7f678b9555d05623db4be8f4fd098 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |