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| Comparison of reflectance and optical textures before and after coke solution loss reaction |
| QIAN Hui， ZHANG Qi-feng， WANG Yan-wen， WU Xin-ci，YANG Guang-zhi， YANG Jun-he |
（1. Research Institute， Baoshan Iron and Steel Co.， Ltd.， Shanghai 201900， China； 2. Manufacturing Department，Baoshan Iron and Steel Co.， Ltd.， Shanghai 201900， China； 3. School of Materials Science and Engineering，
University of Shanghai for Science and Technology， Shanghai 200093， China） |
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Abstract In orde to understand the behavior of coke optical textures in the solution loss reaciton， the reflectance and optical texture content were analyzed before and after the reaction under different conditions.The reactivity index CRI and the coke strength after reaction CSR show good correlationships with coke reflectance parameters and optical textures compositions. The coke with low CRI and high CSR always presented in the higher average maximum reflectance [Rmax]， the higher optical anisotropic index Φ and the less isotropic textures content. After the solution loss reaction under 1 100 ℃， both the values of [Rmax] and Φ of the coke increased. The proportion of the isotropic texture in the coke reduced at the same time， which indicated the isotropic texture was more active than the anisotropic texture. As the reaction temperature was raised to 1 300 ℃， the solution loss of isotropic was 1.07 to 3.00 times of 1 100 ℃ respectively， and the solution loss of anisotropic was 1.22 to 8.58 times of 1 100 ℃ respectively. The coke with better thermal properties has more anisotropic solution loss under 1 300 ℃.
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