【摘要】：金屬鎂是重要的輕金屬,金屬鎂及鎂鋁合金具有優(yōu)良的性能,廣泛應用于航天、航空、冶金、汽車和3C產(chǎn)業(yè)等領(lǐng)域。目前工業(yè)上生產(chǎn)鎂及鎂鋁合金能耗大、成本高、污染嚴重。人們一直在尋找低能耗,對環(huán)境友好的煉鎂及鎂鋁合金的工藝技術(shù)。低溫鎂及鎂鋁合金電解制備能夠降低能耗,且有助于保護環(huán)境。因此,低溫鎂及鎂鋁合金電解制備一直是工業(yè)和學術(shù)界研究、關(guān)注的課題。 本論文采用熔鹽直接電化學脫氧法(FFC)進行低溫熔鹽電脫氧制備金屬鎂及鋁鎂合金。研究了氧化鎂陰極還原過程；氧化鎂陰極制備工藝、陰極電解工藝、不同液態(tài)金屬導電體對電解的影響；Al-Mg合金在低溫熔鹽中的電解制備。 通過實驗得出,固態(tài)氧化鎂低溫熔鹽還原機理是二價鎂→鎂一步完成；MgO燒結(jié)溫度、燒結(jié)時間是影響陰極片制備的因素,確定氧化鎂陰極片制備條件是燒結(jié)溫度范圍1100℃～1200℃,燒結(jié)時間范圍3h-6h；熔鹽溫度、熔鹽中CaCl2的含量是影響電解效果的因素,高的熔鹽溫度對電解有利,CaCl2在熔鹽中含量增加有利于電解反應的快速進行；采用液態(tài)鋁鎂合金導體適合鎂電解；以固態(tài)Al2O3-MgO粉為原料低溫熔鹽電解可以制成Al-Mg合金,確定Al2O3-MgO陰極片燒結(jié)溫度為1300℃,燒結(jié)時間為8h。
[Abstract]:Magnesium is an important light metal. Magnesium and magnesium alloys have excellent properties and are widely used in aerospace, aviation, metallurgy, automotive and 3C industries. At present, the production of magnesium and magnesium aluminum alloy in industry is of high energy consumption, high cost and serious pollution. People have been looking for low-energy, environmentally-friendly magnesium and magnesium aluminum smelting technology. Electrolytic preparation of low temperature magnesium and magnesium aluminum alloys can reduce energy consumption and help protect environment. Therefore, electrolytic preparation of low-temperature magnesium and magnesium-aluminum alloys has been a hot topic in industry and academia. In this paper, molten salt direct electrochemical deoxidation method (FFC) was used to prepare magnesium and aluminum magnesium alloys by electrodeoxidation of molten salt at low temperature. The cathodic reduction process of magnesium oxide, the preparation process of magnesium oxide cathode, cathodic electrolysis process, the effect of different liquid metal conductors on electrolysis, and the electrolysis preparation of Al-Mg alloy in low temperature molten salt were studied. The experimental results show that the reduction mechanism of solid magnesium oxide low temperature molten salt is completed in one step, the MgO sintering temperature and sintering time are the factors affecting the preparation of cathode sheet. It is determined that the preparation conditions of magnesium oxide cathode chip are sintering temperature 1100 鈩，

本文編號：2278480