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| Study on Controlling Step of Gas-solid Reaction of Sintering Flue Gas Dry Desulfurization with Low Grade Pyrolusite |
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Received:November 11, 2015
Revised:November 17, 2015
Accepted:November 18, 2015
Published Online:April 18, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.05.016 |
| KeyWord:sintering flue gas; desulfurization; low grade pyrolusite; gas-solid reaction; controlling step |
| Author | Institution |
| YANG Yu-song |
贵州大学 材料与冶金学院;;贵州省冶金工程与过程节能重点实验室;;贵州省普通高等学校冶金工业节能工程研究中心贵州 贵阳;贵州省普通高等学校冶金工业节能工程研究中心贵州 贵阳 |
| WU Fu-zhong |
贵州大学 材料与冶金学院 |
| WANG Ke-ke |
贵州大学 材料与冶金学院 |
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| Abstract: |
| Effect of temperature on dry desulfurization of sintering flue gas with low-grade pyrolusite was investigated. Relationship between desulphurization rate and desulphurization velocity with pyrolusite and temperature was obtained. External mass transfer, internal diffusion and interfacial chemical reaction were analyzed to determine controlling step(s) of gas-solid reaction between pyrolusite and SO2. The results show that desulfurization rate rises with increasing of temperature, but desulfurization rate shows no evident rise after temperature reaching 110 ℃. External mass transfer and internal diffusion are the controlling steps, of which external mass transfer has the biggest impact on reaction. |
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