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首页> 外文会议>Ninth international conferece on molten slags, fluxes and salts >Vanadium Recovery from Combustion Ash of Orinoco Tar in Venezuela
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Vanadium Recovery from Combustion Ash of Orinoco Tar in Venezuela

机译：委内瑞拉奥里诺科焦油燃烧灰中钒的回收

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摘要

Vanadium is added to the special steel like tool, ship and pipe. Vanadium is produced as a by-product of other metals or recovered from petroleum refining catalyst. Recently, attention has been given to Orinoco tar combustion ash as vanadium resource, because the ash contains more than 20 mass% V2O5. In the first step, vanadium recovery was tried from the combustion ash of Orinoco tar in the present work. The ash mixed CaO was reduced with carbon at 1773K. The mixed sample melted completely and separated into slag and metal containing vanadium carbide at the temperature. Vanadium was not observed in slag phase, and it meant that all of vanadium in ash was recovered as VC in the metal phase. The metal was Fe-Ni alloy. In the second step, Fe-Ni-V-C quo-ternary isothermal section phase diagram was experimentally assembled at 1773K. As the result, the mechanism of vanadium recovery from Orinoco tar combustion ash by reduction with carbon was discussed based on the Fe-Ni-V-C phase diagram system and generating gas species analysis in the heating process.
机译：钒被添加到特殊钢中，例如工具，船舶和管道。钒是其他金属的副产品，也可以从石油精炼催化剂中回收。近来，由于灰分包含大于20质量％的V 2 O 5，已经将奥里诺科焦油燃烧灰作为钒资源给予了关注。第一步，在本工作中尝试从Orinoco焦油的燃烧灰分中回收钒。灰混合的CaO在1773K用碳还原。混合的样品在该温度下完全熔化并分离为矿渣和含碳化钒的金属。在炉渣相中未观察到钒，这意味着灰分中的所有钒均以金属相中的VC的形式回收。金属是Fe-Ni合金。在第二步中，在1773K上实验组装了Fe-Ni-V-C三元等温截面相图。结果，在Fe-Ni-V-C相图系统的基础上，探讨了加热还原法从奥里诺科焦油燃烧灰中钒还原的机理。

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