Rare-earth electrolytic cell upward-inserting type cathode surfacing technology

An electrolytic cell and cathode technology, which is applied to electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of incompatibility of cathode surfacing welding, poor welding effect, and lower use costs, so as to achieve low welding costs, lower cathode use costs, The effect of ensuring electrical conductivity and mechanical strength

Active Publication Date: 2018-07-20
四川江铜稀土有限责任公司
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Problems solved by technology

[0005] The purpose of the present invention is to: aim at the above-mentioned problems, to provide a kind of surfacing welding process for the upper plug-in cathode of the rare earth electrolytic cell. The surfacing welding process of the type cathode resurfacing welding mainly overcomes the technical problem of non-melting cathode surfacing welding, solves

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  • Rare-earth electrolytic cell upward-inserting type cathode surfacing technology
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  • Rare-earth electrolytic cell upward-inserting type cathode surfacing technology

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] Such as Figure 1 to Figure 3 As shown, the electrolytic cell will produce a large amount of fluorine-containing gas (HF) during the electrolysis process to cause corrosion to the cathode, and severely corrode the cathode 1 in the range of 100mm-170mm above the liquid level. process, including the following steps:

[0027] Step 1. Grind and polish the cathode corrosion part first to ensure that the welding surface is free of impurities, oxide layers, and burrs. The entire welding surface ...

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Abstract

The invention discloses a rare-earth electrolytic cell upward-inserting type cathode surfacing technology. The technology comprises the following steps that step 1, a corroded part of a cathode is firstly ground and polished to represent the metal luster of a base material; step 2, the cathode is firstly heated to be close to the melting point of a welding material; step 3, surfacing is carried out on the corroded part of the cathode after the step 2 is completed, in the whole welding process, the base material needs to be heated and welded at the same time, and the welding process cannot be interrupted; step 4, after welding is completed, the cathode is placed in the lime for heat preservation, then the cathode is taken out and cleaned. By carrying out a high-temperature surfacing technology and a lot of experiments, the surfacing technology which is suitable for the rare-earth electrolytic cell upward-inserting type cathode is obtained, the technical problem that cathode surfacing isnot molten is mainly solved, the generation of cracks after surfacing of a tungsten cathode is avoided, the cathode is not in redness when passing through a large current, the normal use requirementsof the rare earth electrolysis are met, recycling of the cathode is realized, and the use cost is reduced.

Description

technical field [0001] The invention relates to the technical field of resurfacing welding of cathodes of electrolytic cells, in particular to a resurfacing process of a plug-in type cathode of a rare earth electrolytic cell. Background technique [0002] With the promotion of fluoride system oxide electrolysis technology in the industry, the plug-in cathode electrolyzer has been greatly developed and applied. The cathode component tungsten, because of its stable chemical properties, high melting point (3422°C), low vapor pressure, high tensile strength, and strong corrosion resistance, is used as an electrolytic cathode and is widely used in fluoride system oxide rare earth electrolytic cells. The fluoride system oxide electrolysis up-plug cathode method has a high temperature at the furnace mouth (1050-1150°C) and a large heat dissipation. During the electrolysis process, a large amount of fluorine-containing gas (HF) will be generated to cause corrosion to the cathode, an...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/235C25C7/02C25C3/34
CPCB23K9/04B23K9/235C25C3/34C25C7/02
Inventor 饶宁徐明钟王学才杨涛
Owner 四川江铜稀土有限责任公司
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