Inorganic Chemicals Industry >
Study on effect and mechanism of hydration of dolime on its magnesium extraction experiment
Received date: 2024-05-10
Online published: 2025-06-05
China is the world′s leading producer and exporter of metallic magnesium.However，the low reduction rate of magnesium oxide results in high energy consumption，inefficient production，and a significant amount of waste magnesium slag with a high content of magnesium oxide.This hinders the green and healthy development of the metallic magnesium industry.To enhance reduction rate of magnesium oxide in magnesium smelting，modified treatment was conductedon the dolime.The dolime derived from dolomite was firstly hydrated and subsequently subjected to further calcination in order to produce hydrated modified dolime.Then the dolime and the hydrated modified dolime were mixed with ferrosilicon and fluorite，pressed into reduced pellets，and subjected to the magnesium extraction experiment under high temperature and vacuum.The properties，structure，composition and morphology of dolime before and after hydration modification and the residual slag and Mg after experiments were characterized by TG，XRD，BET，particle size analyzer and SEM-EDS.The results demonstrated a significant reduction in the particle size of hydrated modified dolime，with the particle size decreasing from 60 μm to 1 μm.The microstructure exhibited a loose and porous nature，characterized by well⁃developed pores and increased pore size，and the specific surface area was increased from 8.41 m2/g to 23.23 m2/g.Furthermore，the modification treatment led to an increase in the reduction rate of magnesium oxide，as evidenced by a reduction rate of 82% for magnesium oxide in experiments using dolime as raw material under a reduction time of 1.0 h，compared to a reduction rate of 94% for magnesium oxide in experiments using hydrated modified dolime as raw material.It suggested that the hydration modification treatment effectively enhanced the physicochemical properties of the dolime，thereby significantly boosting the magnesium smelting efficiency.
Key words： calcined white; hydration; pidgeon; magnesium smelt
LI Zhi , HUANG Xiaorui , JIANG Zhenyu , LI Xue , ZHAO Kun , XU Guangwen . Study on effect and mechanism of hydration of dolime on its magnesium extraction experiment[J]. Inorganic Chemicals Industry, 2025 , 57(5) : 18 -25 . DOI: 10.19964/j.issn.1006-4990.2024-0264
| 1 | 单智伟，王悦存，王鹏飞，等.集成化白云石悬浮煅烧引领镁产业变革［J］.中国材料进展，2024，43（1）：46-53. |
| SHAN Zhiwei， WANG Yuecun， WANG Pengfei，et al.Integrated suspension calcination of dolomite leads great change in magnesium industry［J］.Materials China，2024，43（1）：46-53. | |
| 2 | JAYASATHYAKAWIN S， RAVICHANDRAN M， BASKAR N，et al.Mechanical properties and applications of magnesium alloy?review［J］.Materials Today：Proceedings，2020，27：909-913. |
| 3 | MURTHY Y I.State?of?art studies on applications of magnesium alloys in construction industry［J］.International Journal of Structural Engineering，2024，14（2）：186-202. |
| 4 | 朵云霞，王丽娟，李仪，等.海绵钛中杂质元素Al来源及控制技术研究［J］.钢铁钒钛，2022，43（1）：36-39. |
| Yunxia DUO， WANG Lijuan， LI Yi，et al.Source analysis and control technology of impurity Al in titanium sponge［J］.Iron Steel Vanadium Titanium，2022，43（1）：36-39. | |
| 5 | 李吉帆，盛卓，李开华，等.镁热法生产海绵钛过程反应器温度场模拟研究［J］.钢铁钒钛，2023，44（2）：20-27. |
| LI Jifan， SHENG Zhuo， LI Kaihua，et al.Numerical simulation of the temperature field in titanium sponge reactor during magnesium thermal production process［J］.Iron Steel Vanadium Titanium，2023，44（2）：20-27. | |
| 6 | 毕秋艳，党力，曹海莲，等.青海盐湖镁资源开发与利用研究进展［J］.盐湖研究，2022，30（1）：101-109. |
| BI Qiuyan， DANG Li， CAO Hailian，et al.Development and utilization of magnesium resources in Qinghai salt lakes［J］.Journal of Salt Lake Research，2022，30（1）：101-109. | |
| 7 | 郭丽莉，李振，王晓民，等.水氯镁石和高钙菱镁石制备氢氧化镁［J］.有色金属（冶炼部分），2022（1）：103-107. |
| GUO Lili， LI Zhen， WANG Xiaomin，et al.Preparation of magnesium hydroxide from bischofite and high?calcium magnesite［J］.Nonferrous Metals（Extractive Metallurgy），2022（1）：103-107. | |
| 8 | 乔小斌，李直，徐梓馥，等.盐湖提锂副产镁渣的炼镁工艺研究［J］.现代化工，2023，43（S2）：136-140. |
| QIAO Xiaobin， LI Zhi， XU Zifu，et al.Research on magnesium refining process of by?product magnesium slag from lithium extraction in salt lake［J］.Modern Chemical Industry，2023，43（S2）：136-140. | |
| 9 | 田驰，侯欣彤，韩振南，等.真空下活性煅白制备的反应动力学研究［J］.辽宁化工，2021，50（7）：929-934. |
| TIAN Chi， HOU Xintong， HAN Zhennan，et al.Reaction kinetics study of calcined dolomite under vacuum calcination［J］.Liaoning Chemical Industry，2021，50（7）：929-934. | |
| 10 | 吴晓阳.中国镁资源开发利用现状及发展对策［J］.现代矿业，2023，39（9）：33-38，48. |
| WU Xiaoyang.Present situation and development countermeasures of exploitation and utilization of magnesium resources in China［J］.Modern Mining，2023，39（9）：33-38，48. | |
| 11 | 车玉思，杜胜敏，宋建勋，等.金属镁生产新工艺研究现状与进展［J］.中国有色金属学报，2022，32（6）：1719-1733. |
| CHE Yusi， DU Shengmin， SONG Jianxun，et al.Research status and progress of novel technology for magnesium production［J］.The Chinese Journal of Nonferrous Metals，2022，32（6）：1719-1733. | |
| 12 | 梁文玉，孙晓林，李凤善，等.金属镁冶炼工艺研究进展［J］.中国有色冶金，2020，49（4）：36-44，53. |
| LIANG Wenyu， SUN Xiaolin， LI Fengshan，et al.Research progress on magnesium smelting methods［J］.China Nonferrous Metallurgy，2020，49（4）：36-44，53. | |
| 13 | 朱福兴，李亮，李开华，等.电解法制镁的产品质量分析及控制［J］.轻金属，2019（11）：45-50. |
| ZHU Fuxing， LI Liang， LI Kaihua，et al.Product quality analysis and control of magnesium by electrolysis［J］.Light Metals，2019（11）：45-50. | |
| 14 | FU Daxue， WANG Yaowu， ZHANG Ting′an，et al.Review on the silicothermic process for primary magnesium production［J］.Metallurgical and Materials Transactions B，2023，54（1）：1-21. |
| 15 | XU Jilei， LIU Jinhui， ZHAO Yuming，et al.Mechanism of solid?liquid reaction in magnesium smelting by silicothermic process［J］.Ceramics International，2024，50（9）：14830-14841. |
| 16 | 韩继标，傅大学，郭军华，等.镁蒸气在真空条件下的冷凝行为［J］.稀有金属材料与工程，2021，50（9）：3361-3365. |
| HAN Jibiao， FU Daxue， GUO Junhua，et al.Condensation behavior of magnesium vapor in vacuum［J］.Rare Metal Materials and Engineering，2021，50（9）：3361-3365. | |
| 17 | 徐祥斌，曹慧君，徐佳.煅白热容的理论计算及试验测定［J］.轻金属，2018（3）：46-48. |
| XU Xiangbin， CAO Huijun， XU Jia.Theoretical calculation and experimental determination of calcined dolomite heat capacity［J］.Light Metals，2018（3）：46-48. | |
| 18 | 刘红湘，田阳，杨斌，等.皮江法炼镁与真空碳热还原法炼镁生命周期评价比较研究［J］.有色金属（冶炼部分），2021（11）：37-45. |
| LIU Hongxiang， TIAN Yang， YANG Bin，et al.Comparison on life cycle assessment of magnesium smelting by pidgeon process and vacuum carbothermal reduction method［J］.Nonferrous Metals（Extractive Metallurgy），2021（11）：37-45. | |
| 19 | 郑芮，杨博，王安，等.硅热法炼镁增产提质的原理探索与应用［J］.中国有色金属学报，2023，33（7）：2347-2355. |
| ZHENG Rui， YANG Bo， WANG An，et al.Principle exploration and application of simultaneous achieving production and quality of magnesium in silicothermic reduction process［J］.The Chinese Journal of Nonferrous Metals，2023，33（7）：2347-2355. | |
| 20 | 郭军华，丁天然，李培艳，等.加强炼镁传热效率的研究进展［J］.有色金属科学与工程，2023，14（6）：756-763，772. |
| GUO Junhua， DING Tianran， LI Peiyan，et al.Research progress in strengthening the heat transfer efficiency of magnesium smelting［J］.Nonferrous Metals Science and Engineering，2023，14（6）：756-763，772. | |
| 21 | HIDAYAT T， SIREGAR M Y， SANTOSO I，et al.The effects of reductant and additive on the magnesium extraction from calcined dolomite via metallothermic reduction under vacuum condition［J］.Vacuum，2022，202：111196. |
| 22 | YOOSUK B， UDOMSAP P， PUTTASAWAT B.Hydration?dehydration technique for property and activity improvement of calcined natural dolomite in heterogeneous biodiesel production：Structural transformation aspect［J］.Applied Catalysis A：General，2011，395（1/2）：87-94. |
| 23 | 阿旦春，肖学英，文静，等.氢氧化镁制备活性MgO及MOC的工艺研究［J］.矿产综合利用，2022（3）：17-26. |
| Danchun A， XIAO Xueying， WEN Jing，et al.Study on the preparation of active MgO and MOC from magnesium hydroxide［J］.Comprehensive Utilization of Mineral Resources，2022（3）：17-26. | |
| 24 | 张超，宋建勋，车玉思，等.工艺参数对硅热法炼镁过程的影响机理［J］.中国有色金属学报，2021，31（5）：1347-1357. |
| ZHANG Chao， SONG Jianxun， CHE Yusi，et al.Influence mechanism of technology parameters on silicothermic reduction proc?ess［J］.The Chinese Journal of Nonferrous Metals，2021，31（5）：1347-1357. | |
| 25 | FU Daxue， JI Zonghui， GUO Junhua，et al.Diffusion and phase transformations during the reaction between ferrosilicon and CaO·MgO under vacuum［J］.Journal of Materials Research and Technology，2020，9（3）：4379-4385. |
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