Mechanism of extracting magenesium from mixture of calcined magnesite and calcined dolomite by vacuum aluminothermic reduction

Fu, Daxue; WANG, Yao-wu; Peng, Jianping; Di, Yuezhong; Tao, Shaohu; Niu, Feng

doi:10.1016/s1003-6326(14)63398-7

Cited by 18 publications

(5 citation statements)

References 24 publications

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“…With the increase in initial sulfur content, the magnesium concentration decreased. DaXue Fu et al [83] conducted aluminothermic reduction of a mixture of calcined dolomite and calcined magnesite. The reduction process was divided into three stages.…”

Section: Aluminothermic Methodsmentioning

confidence: 99%

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Zhang

2023

Materials

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Under the policy of low carbon energy saving, higher requirements are put forward for magnesium smelting. As the mainstream magnesium smelting process, the Pidgeon process has the disadvantages of a long production cycle, high energy consumption and high carbon emission, which makes it difficult to meet the requirements of green environmental protection. This paper reviews the research progress on different magnesium smelting processes and further analyzes their energy consumption and carbon emissions. It is concluded that the standard coal required for the production of tons of magnesium using the relative vacuum continuous magnesium refining process is reduced by more than 1.5 t, the carbon emission is reduced by more than 10 t and the reduction cycle is shortened by more than 9.5 h. The process has the advantages of being clean, efficient and low-carbon, which provides a new way for the development of the magnesium industry.

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Section: Aluminothermic Methodsmentioning

confidence: 99%

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Zhang

2023

Materials

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“…Calcite addition may further decrease the Mg 2 + availability in soil water, thereby exacerbating Mg 2 + deficiency in the acidified forest soils of southern and southwestern China. Fu et al [95] Mechanism of extracting magenesium from mixture of calcined magnesite and calcined dolomite by vacuum aluminothermic reduction…”

Section: Study Of Mineral Composition Microstructure Thermal Expansmentioning

confidence: 99%

Review on the elaboration and characterization of ceramics refractories based on magnesite and dolomite

Sadik

Moudden

Bouari

et al. 2016

Journal of Asian Ceramic Societies

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One of the most important elements of furnaces, boilers and other heating units is the structure (lining), usually made of silica-alumina, basic or special refractories. The basic refractories are materials that are increasingly in demand and whose manufacturing involves necessarily the use of MgO and CaO. In this article, the description and characterization of magnesite (MgCO 3) and dolomite (Mg,Ca(CO 3) 2) and their contribution in industrial ceramics-refractories have been reviewed.

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“…Compared with the reducing agents ferrosilicon alloy and carbon, aluminum metal has stronger reducing power. Thus, lots of valuable research works have been focused on the reduction of MgO using the vacuum aluminothermic reduction method with a vacuum pressure of less than 20 pa [19][20][21][22][23]. Nevertheless, this method has some drawbacks; one is that the reduction process is performed under the lower vacuum pressure condition.…”

Section: Introductionmentioning

confidence: 99%

Novel Approach to Prepare Magnesium and Mg-Al Alloy from Magnesia by Using the Closed Microwave Aluminothermic Method

Zhang

Wang

Niu

et al. 2023

Metals

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Herein, we report a novel approach to obtaining magnesium and nanocrystal Mg-Al alloy from magnesia using a closed microwave aluminothermic method in order to solve the problems of high energy consumption, high pollution, and low productivity in the process of magnesium and its alloy production. The main idea of the paper is to design a technique for the preparation of magnesium–aluminum alloy during the reduction process of MgO directly under atmospheric pressure. Based on this experimental idea, we have established a closed microwave aluminothermic reduction reactor. The great advantage of the reaction device is that it can make the reaction material heat up quickly to the reaction temperature in the microwave heating process and produce high-pressure magnesium vapor, which reacts with aluminum dramatically to form Mg-Al alloy under microwave irradiation. By the calculation of the electromagnetic field of the reaction device and sample using ANSYS electronics desktop 2018, the optimum microwave heating conditions for samples have been established. Based on the calculation results, we demonstrate that magnesium and its alloy are prepared successfully by using this method. In addition, the reduction rate of MgO is greatly improved, which is higher up to 79.97 Wt% when the reduction time is 30 min, at 1273 K, and the Mg2Al3 and MgAl alloy is formed during the reduction process as well. Moreover, the formation mechanism of Mg-Al alloy during the reduction process under microwave irradiation was discussed further. Our findings could provide a new approach, insights, and research directions to obtain magnesium and Mg-Al alloy directly from magnesia under normal pressure.

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Mechanism of extracting magenesium from mixture of calcined magnesite and calcined dolomite by vacuum aluminothermic reduction

Cited by 18 publications

References 24 publications

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Research on the Process, Energy Consumption and Carbon Emissions of Different Magnesium Refining Processes

Review on the elaboration and characterization of ceramics refractories based on magnesite and dolomite

Novel Approach to Prepare Magnesium and Mg-Al Alloy from Magnesia by Using the Closed Microwave Aluminothermic Method

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