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| Research on materials of reaction vessel and heating element in SiO production process |
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Received:August 24, 2023
Revised:August 29, 2023
Accepted:August 30, 2023
Published Online:December 22, 2023
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| DOI： |
| KeyWord:anode material; Si-based materials; SiO; reaction vessel; heating element |
| Author | Institution |
| yuankun |
Qinghai Salt Lake Magnesium Industry Co., LTD;Institute of Process Engineering, Chinese Academy of Sciences |
| LIU Zhiming |
Qinghai Salt Lake Yuanpin Chemical Co．，Ltd． |
| chen si-ming |
Institute of Process Engineering, Chinese Academy of Sciences;National Engineering Research Center of Green Recycling for Strategic Metal Resources |
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| Abstract: |
| Si-based anode materials have attracted more attention due to their high specific capacity. SiO is the most promising material for commercial application among the Si-based materials. At present, crucibles and heating elements used in SiO producing process are made of high purity graphite in domestic plant, which always exist corrosion behavior. In this study, the equilibrium product distribution of corrosion reactions between materials of reaction vessel (e.g. graphite, corundum, silicon carbide, boron nitride, aluminum nitride and silicon nitride) and Si+SiO2, and materials of heating element (e.g graphite, silicon-carbon and silicon-molybdenum) and SiO in SiO production process was simulated.The simulation results showed that silicon carbide has a small amount of corrosion when the temperature exceeds 1 080 ℃, while boron nitride will not be corroded when the temperature is higher than 1 170 ℃, and will be corroded to form Si2N2O and B when the temperature is lower than 1 170 ℃. The corrosion product Si2N2O and B does not react further with the reaction material. Considering the cost SiC is more suitable for the reaction vessel in SiO production. The analysis results of materials of heating elements showed that the silicon carbon rod and the silicon molybdenum rod after pretreatment with oxidation atmosphere have less corrosion. The silicon molybdenum rod is more suitable for the heating elements considering the heating temperature. |
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