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A multi-slot porous prebaked anode

A prebaked anode and groove technology, which is applied in the field of aluminum electrolysis, can solve the problems of increasing the manufacturing cost of electrolytic aluminum, increasing the distance between cathode and anode, and reducing the current efficiency, so as to improve technical and economic indicators, shorten the distance, and reduce power consumption. Effect

Inactive Publication Date: 2016-07-20
新疆农六师碳素有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent the secondary reaction from reducing the current efficiency, the distance between the cathode and the anode must be increased, thereby increasing the cell voltage, increasing power consumption, and increasing the manufacturing cost of electrolytic aluminum
Usually CO 2 It can produce a voltage drop of 250mV, and a voltage drop of 1mV will consume 3 degrees of electricity, so that the production of 1 ton of aluminum ingots will consume an additional 750 degrees of electricity

Method used

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  • A multi-slot porous prebaked anode
  • A multi-slot porous prebaked anode
  • A multi-slot porous prebaked anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] see image 3 and Figure 4 , the multi-groove porous prebaked anode of the present invention comprises a first groove 2 and a second groove 3, the first groove 2 is arranged along the anode length direction, the second groove 3 is arranged along the anode width direction, the first groove 2 and the The second trenches 3 intersect to produce an intersection point 5 . The intersection point 5 connects the two grooves, so that the air bubbles at the bottom of the anode can escape through channels in four directions, which accelerates the discharge speed; Bubbles from bottom center point.

[0038] The included angle between the first groove 2 and the second groove 3 is between 90-140°, and the included angle refers to the obtuse angle formed by the two grooves. 90° as Figure 4 shown, 140° as Figure 11 shown.

[0039] At least one vertical exhaust hole 7 is provided at the top of the first groove 2 and the second groove 3 . The angle between the vertical exhaust hol...

Embodiment 2

[0041] see Figure 5 to Figure 8 The distance from the middle of the first groove 2 of the multi-groove porous prebaked anode of the present invention to the bottom of the groove is smaller than the distance from the two ends of the top of the groove to the bottom of the groove. The middle of the top refers to the position where the longitudinal section of the groove is divided into three equal parts in the length direction, and the middle 1 / 3 part occupies it.

[0042] Vertical exhaust holes 7 are arranged on the top of the groove, and the number of vertical exhaust holes 7 on each groove can be 1-5. Moreover, setting the vertical exhaust hole 7 on the intersection point 5 can further accelerate the escape of air bubbles at the center of the bottom of the anode.

[0043] see Figure 5 , that is, the length of the line segment A2B2 is smaller than that of the line segment A1B1, and the length of the line segment A3B3 is smaller than that of the line segment A4B4. In this wa...

Embodiment 3

[0052] see Figure 10 and Figure 11 , the multi-groove prebaked anode of the present invention comprises a first groove 2, a second groove 3 and a third groove 6, the first groove 2 is arranged along the length direction of the anode, the second groove 3 and the third groove 6 are arranged along the The width direction of the anode is set, therefore, the first groove 2, the second groove 3, and the third groove 6 must produce two intersection points 5, which especially accelerates the most difficult to discharge at present, the air bubbles generated at the center point of the bottom of the anode. And the air bubbles can be discharged from the 6 slots on the side of the anode, further dispersing the air bubble discharge density.

[0053] Moreover, setting the vertical exhaust hole 7 on the top of the groove not only accelerates the bubble discharge speed, but also allows more outlets for the bubbles, disperses the boiling density and strength of the electrolyte, helps reduce ...

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Abstract

The invention discloses a multi-groove multi-hole prebaked anode used in aluminum electrolysis industry, the bottom of which being provided with at least two grooves having at least one intersecting point, at least one vent hole being disposed on the grooves. By changing the relative positions of a plurality of grooves of the prebaked anode in prior art and disposing a plurality of vent holes on the top of the grooves, channels and passages for discharging gas of the anode are increased, and the discharge distance and the discharge resistance of bubbles are reduced, leading to apparent reduction of bubbling degree of electrolyte around the anode, and the improvement of current efficiency of electrolysis and stable operation of the electrolytic cell.

Description

technical field [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a multi-slot porous prebaked anode provided with a plurality of intersecting grooves. Background technique [0002] The production of aluminum industry mainly adopts cryolite-alumina molten salt electrolysis method. After the direct current is passed into the electrolytic cell, the cathode soaked in the electrolyte and the multi-slot porous prebaked anode undergo an electrochemical reaction: the electrolytic product on the cathode is aluminum liquid, The electrolysis product on a multi-slot porous prebaked anode is CO 2 gas. [0003] The function of the multi-slot porous prebaked anode is to transmit direct current to the electrolyte solution in the electrolytic cell through the anode guide rod, explosive block, anode steel claw and anode carbon block, and connect the circuit. At present, the anode used in aluminum electrolysis is an imitation cuboid block, with a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/12
Inventor 刘宇敬叶灵洪波
Owner 新疆农六师碳素有限公司