Electrolytic mechanism of Al from chloride bath by Hot-Filament methode.

热丝法从氯化物浴中电解铝的机理

• 批准号: 61550500
• 负责人: NOGUCHI Fumio
• 金额: $ 1.15万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61550500/
• 关键词: Metal fog; ALCL_3; Aluminum electrolysis; Metal fog(金属霧); Anode effect(陽極効果); Hot-Filament法

This study was investigated the behaviour of occurrence of metal fog by the Hot-Filament methode and stereoscopic microscope on the aluminium electrolysis using chloride instead of fluoride. The low-temperature electrolysis of ALCL_3 was carried out in NaCL-ALCL_3 or LiCL-ALCL_3 bath. Apperance of aluminum deposition was shown the dendritic crystal in NaCL-ALCL_3 bath, but it in LiCL-ALCL_3 bath was needle or fluffy shape.The remarkable phenomena of metal fog is redissolution of depositted aluminum into bath, and it was easily ocurred in LiCL-ALCL_3 bath than NaCL-ALCL_3 bath. The high-temperature electrolysis of ALCL_3 was indicated a droplet type at start and layer at 30 60 sec in NaCL-LiCL-ALCL_3 bath. Inthis case, metal fog was observed hardly in short period of time.On the electrolysis in crusible methode, the recovery of Al has on advantege over the addition of vaporized ALCL_3 than the addition of solid ALCL_3 in the bath.

本文用热灯丝法和体视显微镜研究了以氯代氟铝电解过程中金属雾的发生行为。在NaCL-ALCL_3和LiCL-ALCL_3体系中进行了低温电解ALCL_3的研究。NaCL-ALCL_3镀液中铝沉积的外观为树枝状结晶，而LiCL-ALCL_3镀液中铝沉积的外观为针状或蓬松状，金属雾的显着现象是沉积的铝重新溶解到镀液中，并且在LiCL-ALCL_3镀液中比在NaCL-ALCL_3镀液中更容易发生金属雾。在NaCL-LiCl-ALCL_3体系中，ALCL_3的高温电解在开始时为液滴型，30 ~ 60秒时为分层型。在坩埚法电解中，加入蒸发态的ALCL_3比加入固体态的ALCL_3对铝的回收率无明显影响。

项目成果

Fumio NOGUCHI: "Electrolytic mechanism of Al from chloride bath by Hot-filament methode." Light metal.

Fumio NOGUCHI：“通过热丝法从氯化物浴中电解铝的机理。”