Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for removing anode residues attached to spent anodes coming from melt bath electrolysis potlines

A technology for electrodes and anodes, which is applied in the field of removing carbon-containing blocks and metal sleeves stuck on the anode rod, and can solve problems such as damaged pillars, uneven distribution of fixed plates, stoppers, etc.

Inactive Publication Date: 2009-02-18
E-CL
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this fixing plate acts as a non-uniformly distributed, stub-dependent stop; especially during casing stripping, it generates large lateral forces that can severely damage the struts or even the rods of the anode

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing anode residues attached to spent anodes coming from melt bath electrolysis potlines
  • Method for removing anode residues attached to spent anodes coming from melt bath electrolysis potlines
  • Method for removing anode residues attached to spent anodes coming from melt bath electrolysis potlines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0054] Example ( Figure 1 to Figure 4 )

[0055] The method according to the invention is here based on the methods used to implement it, such as Figure 1 to Figure 4 The specific machine shown in is described.

[0056] The depleted anode 100 includes a rod 120 made of a conductive metal and a butt 110 made of a carbonaceous material. The connection between the rod and the body of carbonaceous material is achieved by a steel strut 121 attached to the base of the rod and generally in the shape of an inverted branched candlestick, each branch 123 of which is Connected with a stub 122 . In the particular case of this embodiment, the carbonaceous body is fixed to the rod by means of four stubs 122 . The mechanical and electrical connection between the carbonaceous body and each stub is made by a cast iron sleeve 130 .

[0057] The spent anode 100 is inserted vertically into the anode butt stripping and bushing stripping machine. The electrode butt 110 and the anode support...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A process for extracting the anode butt (110) and the thimbles (130) attached to a spent anode or to a rejected new anode, including the following stages: a) the butt (110) is fitted between a stop device (200) and an attacking device (300) said stop device having a first stop (211) blocking the butt, said attacking device being provided, around each stub, with a recess presenting a second stop (225) which blocks said thimbles, the axial distance between the stops being equal to, or greater than, the height of the thimbles; b) the butt is moved so that it come us against the first stop; c) the attacking device is moved: the butt breaks up; d) the fragments of butt are removed; c) the attacking device continues to move: the thimbles are detached from the stubs; f) the attacking device stops and is withdrawn. In two successive, clearly separated stages, the butt fragments and the thimbles are detached, fall and can be sent directly to a special recycling unit.

Description

technical field [0001] The present invention relates to the production of aluminum using pyro-electrolysis. More specifically, it relates to a method for removing carbonaceous blocks and metal sleeves stuck to an anode rod, in order to reuse the anode rod and the struts cleaned in this way, and to recycle the removed material . The method primarily involves removing residual debris from depleted anodes, but it can also involve stripping off defective new anodes. Background technique [0002] Aluminum is produced industrially by pyroelectrolysis, ie by electrolysis of a solution of aluminum oxide in molten cryolite (called an electrolyte) using the Hall-Héroult process. The electrolyte is contained in a tank called an "electrolyzer", which consists of a steel vessel internally covered with refractory and / or insulating material, and a cathode unit at the bottom of the tank. The anodes, usually made of carbonaceous material, are fixed to a superstructure equipped with means ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06C25C3/12
CPCC25C3/125Y10T29/4973Y10T29/53278C25C3/06
Inventor D·莱斯卡斯利
Owner E-CL