Development of Cryptocrystalline Graphite Desulfurization Methods
| Autor: | G. A. Koroleva, S. I. Lytkina, T. R. Gilmanshina |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Aggregate (composite)
Materials science Cryptocrystalline Mechanical Engineering 05 social sciences Metallurgy chemistry.chemical_element Heat transfer coefficient 010502 geochemistry & geophysics Condensed Matter Physics 01 natural sciences Sulfur Sulfide minerals Flue-gas desulfurization chemistry Mechanics of Materials 0502 economics and business General Materials Science Graphite Activation method 050203 business & management 0105 earth and related environmental sciences |
| Zdroj: | Materials Science Forum. 989:583-588 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.989.583 |
| Popis: | Increasing demands on the quality of graphite cause carrying out detailed studies of its desulfurization. Combined sulfur present in natural graphite reduces the heat transfer coefficient, increases the heat energy consumption, pollutes the atmosphere with harmful emissions in the process of their application in various branches of industry. The technology and deepness of desulfurization is determined by the total content and ratio of various sulfur compounds in graphite. Previously, a number of technologies for cryptocrystalline graphite enrichment had been developed by the authors. However, the use of these technologies does not effectively reduce the sulfur content in the graphite composition. Therefore, the aim of this work is to develop activation methods that can reduce effectively the sulfur content in the composition of cryptocrystalline graphite. In order to reduce the total sulfur content, mechanical and electro-explosive-pulsing activation were tested. Mechanical activation of graphite was carried out in АGО-2, DCM, D-100 activator mills in different environments and at different activation time. To implement electric-explosive-pulsing activation, special equipment was used. In the process of the research it has been found that the use of mechanical activation and electric-explosive-pulsing activation does not reduce the sulfur content below 0.25 wt.%. Mechanical activation of graphite in different modes enables more intensive release of sulfide minerals from aggregate graphite formations and their intensive oxidation. |
| Databáze: | OpenAIRE |
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