The Hot Strength of Industrial Cokes - Evaluation of Coke Properties that Affect Its High-Temperature Strength

The strength of coke at high temperatures is of major importance for efficient blast furnace operation. Despite this, there is little information regarding the hot strength of coke. In this research, the hot strength of three industrial European coke grades was studied using a Gleeble thermomechanic...

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Veröffentlicht in:Steel research international 2014-12, Vol.85 (12), p.1608-1619
Hauptverfasser: Haapakangas, Juho A., Uusitalo, Juha A., Mattila, Olli J., Gornostayev, Stanislav S., Porter, David A., Fabritius, Timo M. J.
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container_end_page 1619
container_issue 12
container_start_page 1608
container_title Steel research international
container_volume 85
creator Haapakangas, Juho A.
Uusitalo, Juha A.
Mattila, Olli J.
Gornostayev, Stanislav S.
Porter, David A.
Fabritius, Timo M. J.
description The strength of coke at high temperatures is of major importance for efficient blast furnace operation. Despite this, there is little information regarding the hot strength of coke. In this research, the hot strength of three industrial European coke grades was studied using a Gleeble thermomechanical simulator. The hot strength was analyzed at three different temperatures: room temperature, 1600 and 1750 °C by measuring the compressive strength of roughly 50 coke samples at each temperature. A significant decrease in strength was observed for all three coke grades at high temperatures. Notable differences between the coke grades in compressive strength were observed at room temperature. At high temperatures, differences were observed in strength and deformation behavior; however, the order of magnitude of strength remained the same. The deformation behavior at high temperatures was also studied and discussed based on stress–strain curves. Several structural properties of coke such as total porosity, pore size distribution, pore shape factor, amount of inerts, and degree of graphitization were determined in order to explain the obtained strength results. Both hot and room temperature compressive strength values were compared to industrial strength tests and discussed. The reliability of the results was evaluated with statistical analyses. The strength of metallurgical coke is vital for efficient blast furnace operation. The hot strength of industrial cokes is studied by using a Gleeble 3800 thermomechanical simulator. The properties of coke that could affect their hot strength are determined and discussed.
doi_str_mv 10.1002/srin.201300450
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At high temperatures, differences were observed in strength and deformation behavior; however, the order of magnitude of strength remained the same. The deformation behavior at high temperatures was also studied and discussed based on stress–strain curves. Several structural properties of coke such as total porosity, pore size distribution, pore shape factor, amount of inerts, and degree of graphitization were determined in order to explain the obtained strength results. Both hot and room temperature compressive strength values were compared to industrial strength tests and discussed. The reliability of the results was evaluated with statistical analyses. The strength of metallurgical coke is vital for efficient blast furnace operation. The hot strength of industrial cokes is studied by using a Gleeble 3800 thermomechanical simulator. 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At high temperatures, differences were observed in strength and deformation behavior; however, the order of magnitude of strength remained the same. The deformation behavior at high temperatures was also studied and discussed based on stress–strain curves. Several structural properties of coke such as total porosity, pore size distribution, pore shape factor, amount of inerts, and degree of graphitization were determined in order to explain the obtained strength results. Both hot and room temperature compressive strength values were compared to industrial strength tests and discussed. The reliability of the results was evaluated with statistical analyses. The strength of metallurgical coke is vital for efficient blast furnace operation. The hot strength of industrial cokes is studied by using a Gleeble 3800 thermomechanical simulator. The properties of coke that could affect their hot strength are determined and discussed.</description><subject>blast furnace</subject><subject>Blast furnaces</subject><subject>Coke</subject><subject>Compressive strength</subject><subject>Gleeble</subject><subject>High temperature</subject><subject>Porosity</subject><subject>Simulation</subject><subject>Statistical analysis</subject><subject>Steel</subject><subject>Strength</subject><subject>Tensile strength</subject><issn>1611-3683</issn><issn>1869-344X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqFkU1PGzEQhlcVlYqAK2dLvXDZ4Fl7_XFEgZBIiH4QVNSL5Tg2MWzWwfa28O_rKFVUcelcPPI8z2ikt6pOAY8A4-Y8Rd-PGgwEY9riD9UhCCZrQunDQekZQE2YIJ-qk5SecCkiBOP0sOrnK4umIaO7HG3_mFcoODTrl0PK0esOjcOzTahGV790N-jsQ78Ftr_oawwbG7Mv87zSGV04Z01Gs5zQ1D-u6rldl7nOQ7T77cfVR6e7ZE_-vkfV_eRqPp7WN1-uZ-OLm9rQRuDaGUcpl1SwBjSV2i25EE60zlBJASSlDIzj0PIF1gbLhQaycAtiCJdLagg5qs52ezcxvAw2ZbX2ydiu070NQ1LAWqBN22Je0M_v0KcwxL5cV6hGEmACmkKNdpSJIaVondpEv9bxTQFW2wTUNgG1T6AIcif89p19-w-t7r7Pbv91653rU7ave1fHZ8U44a36cXutmssHmHz7OVGU_AGg55iV</recordid><startdate>201412</startdate><enddate>201412</enddate><creator>Haapakangas, Juho A.</creator><creator>Uusitalo, Juha A.</creator><creator>Mattila, Olli J.</creator><creator>Gornostayev, Stanislav S.</creator><creator>Porter, David A.</creator><creator>Fabritius, Timo M. 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subjects blast furnace
Blast furnaces
Coke
Compressive strength
Gleeble
High temperature
Porosity
Simulation
Statistical analysis
Steel
Strength
Tensile strength
title The Hot Strength of Industrial Cokes - Evaluation of Coke Properties that Affect Its High-Temperature Strength
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