CN103397350A

CN103397350A - Special-shaped graphite anode

Info

Publication number: CN103397350A
Application number: CN201310338776XA
Authority: CN
Inventors: 刘建刚; 袁萍
Original assignee: Jiangxi Rare Earth and Rare Metals Tungsten Group Holding Co Ltd
Current assignee: Jiangxi Rare Earth and Rare Metals Tungsten Group Holding Co Ltd
Priority date: 2013-08-06
Filing date: 2013-08-06
Publication date: 2013-11-20

Abstract

A special-shaped graphite anode is characterized in that: anode-clamp-connected end of the graphite anode is properly thickened by special shape processing to enhance the anti-erosion ability of the graphite anode in air or electrolytic atmosphere so as to ensure that the graphite anode and an anode clamp always are closely connected. The outstanding advantages of the special-shaped graphite anode are that: in a technology for electrolyzing to produce rare earth metals by adding rare earth oxides into a fluoride salt system, the utilization rate of the graphite anode is substantially increased, the material cost is reduced, the contact surface of the anode clamp and the graphite anode is increased, the connection resistance is reduced, further the power consumption is reduced, and the exposure rate and the exposure time of the anode clamp are reduced, so that product contamination caused by a anode material can be reduced, and the product quality can be improved.

Description

Special-shaped graphite anode

Technical field

The present invention relates to a kind of special-shaped graphite anode of re metal electrolyzing technique.

Background technology

At present, produce single rare earth metal or rare earth alloy and adopt the villiaumite system to add oxidation Rare Earth Electrolysis technique, this process using blocky graphite, as anode, adopts the upper hanging type anode.In production, graphite anode is connected with positive source by anode clamp.Graphite anode belongs to consumable anode, must regularly change in process of production, with normally carrying out of guaranteeing to produce.In production process, find, it is faster than the spending rate that is in part in molten salt electrolyte that graphite anode is exposed at the spending rate of molten salt electrolyte exterior portion, the result that causes is: 1. being fastenedly connected in advance of graphite anode and anode clamp lost efficacy, graphite anode must be changed in advance, thereby reduced the utilization ratio of graphite anode, increased the use cost of graphite anode.2. increased the contact resistance between graphite anode and anode clamp, caused under identical Faradaic current electrolysis voltage higher, thereby increased electrolytic power consumption.3. increase anode and be clipped in exposure and the open-assembly time of molten salt electrolyte upper space, thereby increased the pollution of anode material to product.

Summary of the invention

The object of the present invention is to provide a kind of special-shaped graphite anode, overcome the shortcoming that former blocky graphite anode work-ing life is short, utilization ratio is low and electrolysis voltage is high.

A kind of special-shaped graphite anode, it is characterized in that: the end that graphite anode is connected with anode clamp carries out suitably thickening of abnormal shape processing, the ability that corrodes to strengthen graphite anode opposing air or electrolysis atmosphere, thereby guarantee that graphite anode closely is connected all the time with anode clamp, can reduce simultaneously exposure and the open-assembly time of anode clamp at the molten salt electrolyte upper space as far as possible.

Further, the suitable mode of thickening of an end that graphite anode is connected with anode clamp can be both inboard thickening, can be also that the outside thickeies, and can also be that the interior outside thickeies simultaneously; In production, concrete thickening mode, thickness and height can suitably be adjusted according to the size of electrolytic furnace body structure.

Advantage of the present invention is: by adopting above three kinds of different modes, increase the graphite anode upper end and be exposed to airborne thickness, extend its aerial combustion time, the work-ing life of improving anode; Can increase on the one hand the contact area of anode clamp and graphite anode, reduce contact resistance, the while can guarantee anode in use anode clamp with graphite anode, closely be connected all the time; Can strengthen on the other hand the protection of graphite anode antianode folder, after the graphite anode thickening, ablation degree reduction in air, avoided anode clamp to be exposed to too early in the high-temperature acidic surrounding medium, causes the anode clamp material corrosion, comes off, and reduces the purity of product.Therefore the present invention can make the utilization ratio of graphite anode significantly promote, reduce material cost; Increase the contact surface of anode clamp and graphite anode, reduce contact resistance, further reduce power consumption; Reduce exposure and the open-assembly time of anode clamp, thereby reduce anode FolderThe pollution of material to product, Improving The Quality of Products.

The accompanying drawing explanation

Fig. 1 is former graphite anode structure schematic diagram;

Fig. 2 is structural representation of the present invention.

Embodiment

Now the invention will be further described in conjunction with the accompanying drawings and embodiments:

Be illustrated in figure 1 former graphite anode structure schematic diagram, anode clamp 1 is by tangling common block graphite anode 3 on standing screw 2.On anode clamp 1 and graphite anode 3, equal car has internal thread, by bolt, anode clamp 1 is connected with graphite anode 3.

As shown in Figure 2: a kind of special-shaped graphite anode is characterized in that: the end that graphite anode 5 is connected with anode clamp 4 carries out the suitable thickening of abnormal shape processing, the form of thickening simultaneously outside employing is interior; The present invention is used in the production practice of 8000A electrolytic furnace electrolysis production lanthanoid metal, metallic cerium, well applied and obtained good effect, its outstanding advantage is: 1. the utilization ratio of graphite anode is brought up to more than 80% by 62% original left and right, greatly reduces the use cost of graphite anode material; 2. under identical Faradaic current, electrolysis voltage drops to present 8.5V left and right by original 9.5V left and right, and electrolytic power consumption has descended more than 10%; 3. the anode clamp material only has originally 30% to the contamination level of product, and quality product significantly promotes; 4. the replacement frequency due to graphite anode reduces, and in production process, the stability of the working of a furnace further improves.

Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention; make without departing from the inventive concept of the premise some alternative or obvious modification that are equal to; and performance or purposes identical, should be considered as belonging to the protection domain that claims that the present invention submits to are determined.

Claims

1. special-shaped graphite anode, it is characterized in that: the end that graphite anode (5) is connected with anode clamp (4) carries out suitably thickening of abnormal shape processing, the ability that corrodes to strengthen graphite anode opposing air or electrolysis atmosphere, thus guarantee that graphite anode closely is connected all the time with anode clamp.

2. special-shaped graphite anode according to claim 1 is characterized in that: the end that graphite anode (5) is connected with anode clamp (4) the suitably mode of thickening can be both inboard thickening, can be also outside thickening, can also be that the interior outside thickeies simultaneously.