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有色金属(冶炼部分):2024,(12):50-57
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新型碳还原炼镁工艺热力学分析及可行性研究
李晓峰1, 刘金辉2, 张少军2
(1.宝钢金属有限公司;2.郑州大学)
Thermodynamic Analysis and Feasibility Study of a Novel Carbothermal Reduction of Magnesium Smelting
LI Xiaofeng1, MAO Zhiping, LIU Jinhui2, YANG Peixu, ZHANG Weidong, HU Yong, TANG Weineng, ZHANG Shaojun
(1.Baosteel Metal Co.,Ltd.;2.Zhengzhou University)
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投稿时间:2024-05-27    修订日期:2024-06-07
中文摘要: 碳热法炼镁工艺具有能耗低和碳排放低的优点,但由于混合气发生逆反应的问题导致其并未工业化应用。提出一种新型碳还原炼镁工艺,并运用热力学计算软件FactSage8.2进行热力学分析。第一阶段炼镁工艺的合适温度和系统真空度区间分别为1 250~1350 ℃和2 000~4 000 Pa;第二阶段电石冶炼工艺的合适温度和系统真空度区间分别为1 650~1 800 ℃和3 000~10 000 Pa。相关试验结果表明:随着系统压强的增大,第一阶段副反应发生程度减弱;在1 350 ℃、4 000 Pa和反应时间2 h的条件下,第一阶段炼镁还原率达90%以上且副反应发生程度微弱;在1 800 ℃、5 000 Pa和反应时间0.5 h的条件下,第二阶段反应所得电石品质可达到市场优等品(发气量≥300 L/kg)的标准。
中文关键词: 镁冶炼  碳热法  副反应  电石
Abstract:The carbothermal process of magnesium smelting has the advantages of low energy consumption and low carbon emissions. However, it has not been used industrially due to the problem of reverse reaction in the mixed gas. A new type of carbothermal reduction of magnesium smelting was proposed and thermodynamic calculation was carried out by FactSage8.2 software. The suitable temperature and system vacuum degree for the first stage magnesium refining process are 1 250—1 350 ℃ and 2 000—4 000 Pa, respectively, while for the second stage carbothermic smelting process they are 1 650—1 800 ℃ and 3 000—10 000 Pa, respectively. The experimental results show that with the increase of system pressure, the degree of occurrence of side reactions in the first stage decreases. Under the conditions of 1 350 ℃, 4 000 Pa and a reaction time of two hours, the reduction rate of magnesium refining in the first stage is over 90% and the occurrence of secondary reactions is weak. Under the conditions of 1 800 ℃, 5 000 Pa and a reaction time of half hour, the quality of calcium carbide obtained in the second stage reaction can meet market standards for superior grade (gas yield ≥300 L/kg).
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基金项目:国家重点研发计划项目(2021YFB3701102,2023YFB3710900)
引用文本:
李晓峰,刘金辉,张少军.新型碳还原炼镁工艺热力学分析及可行性研究[J].有色金属(冶炼部分),2024(12):50-57.
LI Xiaofeng,LIU Jinhui,ZHANG Shaojun.Thermodynamic Analysis and Feasibility Study of a Novel Carbothermal Reduction of Magnesium Smelting[J].Nonferrous Metals (Extractive Metallurgy),2024(12):50-57.

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