EP0191954A1 - Anode block remnant breaker - Google Patents
Anode block remnant breaker Download PDFInfo
- Publication number
- EP0191954A1 EP0191954A1 EP85200229A EP85200229A EP0191954A1 EP 0191954 A1 EP0191954 A1 EP 0191954A1 EP 85200229 A EP85200229 A EP 85200229A EP 85200229 A EP85200229 A EP 85200229A EP 0191954 A1 EP0191954 A1 EP 0191954A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anode
- push
- anode rod
- block
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
Definitions
- the invention relates to an apparatus for breaking away the remnant of an anode block on stubs of an anode rod.
- NL-A-6903190 (corresponding to GB-A-1269809) shows apparatus for breaking an anode block remnant away from the anode rod which is also intended to break the remnant up, for which purpose crushing teeth are provided.
- two pairs of movable clamping assemblies grip the stubs of the anode rod frictionally, while the clamp members each carry a downwardly movable pushing disc. There are thus four discs, acting at spaced parts of the anode block.
- the present invention has as its object the removal of the anode block in one piece or as large pieces as possible. Furthermore it is sought to avoid the disadvantage of frictional gripping of the anode rod and to make possible a relatively simple construction which is able to accommodate the high forces which may arise.
- the invention is set out in claim 1.
- the apparatus has a hoist, for moving the anode rod vertically, suspended from the hoist.
- the apparatus has a frame and two carriages which can be moved on the frame horizontally towards or away from each other and each having, on the ends which is opposed to the other front member, a front member, the push beams being mounted so as to move vertically on the respective front members, and there being a guide channel in one of the front members for guiding the stop element.
- This construction has the advantage that at least on one side, the high separation forces act within the structure of the front member.
- the apparatus comprises a horizontally and vertically extending rectangular frame 1, within which two horizontally movable breaking carriages 2 and 3 can travel simultaneously, being moved by respective carriage cylinders 4 and 5, between vertical carriage guides 7 (Fig. 2) in the form of two pairs of freely moving rollers mounted on the frame 1.
- Fig. 1 shows that the breaking carriages 2 and 3 are also guided horizontally by horizontal carriage guides 6 in the form of two pairs of freely moving rollers mounted on the frame 1.
- the breaking carriages 2, 3 each carry a front member in the form of a large front plate 8, 9 and in the space between these two front plates 8, 9 a vertically movable hoist, not shown, can raise or lower the anode rod suspended from it,when the carriages 2 and 3 are moved apart.
- a rod guide 10 fixed to the frame 1 prevents the suspended anode rod from swinging excessively.
- Figs. 3a, 3b and 4 show the front plates 8 and 9 on a larger scale.
- the front plate 8 carries a horizontally movable stop element in the form of a flat rectangular rod or peg 11 which is horizontally moved by a cylinder unit 12 mounted fixedly on the breaking carriage 2.
- the peg 11 can move horizontally in a guide channel 13 which is formed in the front plate 8 and a forward extension thereof. This construction is suitable for an anode block with two or four stubs.
- Two pairs of bearing blocks 14 and 15 are mounted on each of the front plates 8 and 9, and a pair of guide rods 17 and 18 are movable vertically in the bearing blocks.
- These rods 17 and 18 are connected, between pairs of blocks 14 and 15, by a transverse yoke-shaped connecting assembly of plates 16, which assembly is fixed at its extremities to a pair of vertically acting hydraulic cylinder units 20 and 21.
- the piston rods of these cylinders 20 and 21 are mounted at 25 on the front plate.
- the guide rods 17 and 18 together carry a horizontally extending push beam 23, 24.
- Each front plate is provided on its rear side with a vertical adjustment screw 26 for height adjustment relative to the track of the breaking carriages 2 and 3.
- the peg 11 is moved into this gap by actuation of the peg cylinder 12. Then the four pushing cylinders 20 and 21 are actuated so that the two push beams 23 and 24 are pressed downwards onto the top surface of the anode block (which is below the peg 11) by the connecting plates 16 and the guide rods 17 and 18. This results in the rod with the anode remnant being pressed downward until the Y -piece meets the peg 11 which restrains it from descending.
- the beams 23, 24 engage the anode block over a substantial length extending beside and preferably the full length of the Y-piece.
- the anode remnant is now pushed off the Y-piece and falls as a whole into a tray installed under the breaker.
- the bottom faces of the push beams 23 and 24 are inclined downwardly towards their inner edges, i.e. the beams are of trapezoidal shape as shown in Fig. 3, so that when they are pressed downwards the greatest force is exerted on the top of the anode block as close as possible to the two sides of the stubs of the Y-piece.
- the anode rod is drawn upwards slightly and any residue which remains behind in the Y-piece aperture is now removed. Then the hydraulic cylinders 20 and 21 are actuated in reverse and the peg 11 is drawn back into the channel 13, after which the breaker carriages 2 and 3 are moved apart again by the appropriate actuation of the two carriage cylinders 4 and 5 respectively.
- the anode rod with the now bare Y-piece can be raised by the hoist and removed via the mono-rail.
- anode remnant breaker in the embodiment here depicted and described is suitable for the case in which the anode block is connected to the anode rod by means of only two stubs (of a Y-piece),.the present invention is not limited to this case, since the principle behind the invention is equally applicable to other known types of anode block with three, four or six stubs. With anode blocks with three or six stubs (two rows of three), two stop pegs which can be moved in parallel are required; for an anode block with four stubs (arranged in a square) one stop peg is sufficient.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Description
- The invention relates to an apparatus for breaking away the remnant of an anode block on stubs of an anode rod.
- In the electrolysis of alumina to aluminium, use is made of carbon anodes which are suspended on an anode rod by means of, for example, two stubs of a Y-piece (also called a breech piece or fork piece) at the lower end of the anode rod which is fixed to the current-carrying conductor. After for example about 26 days an anode block is worn out, and the block must be exchanged for a new block. The remnant of the anode block which is on the Y-piece must be broken away from the Y-piece. However, because the residual value of the large carbon fragments is higher than that of small ones, it is important to release the anode block from the breech piece as far as possible as a whole, or in the largest possible fragments.
- NL-A-6903190 (corresponding to GB-A-1269809) shows apparatus for breaking an anode block remnant away from the anode rod which is also intended to break the remnant up, for which purpose crushing teeth are provided. To break the block away, two pairs of movable clamping assemblies grip the stubs of the anode rod frictionally, while the clamp members each carry a downwardly movable pushing disc. There are thus four discs, acting at spaced parts of the anode block.
- The present invention has as its object the removal of the anode block in one piece or as large pieces as possible. Furthermore it is sought to avoid the disadvantage of frictional gripping of the anode rod and to make possible a relatively simple construction which is able to accommodate the high forces which may arise.
- The invention is set out in claim 1.
- It appears that by use of the apparatus of the invention the anode blocks can remain almost entirely intact and so retain the maximum possible residual value.
- Preferably the apparatus has a hoist, for moving the anode rod vertically, suspended from the hoist.
- Preferably also the apparatus has a frame and two carriages which can be moved on the frame horizontally towards or away from each other and each having, on the ends which is opposed to the other front member, a front member, the push beams being mounted so as to move vertically on the respective front members, and there being a guide channel in one of the front members for guiding the stop element. This construction has the advantage that at least on one side, the high separation forces act within the structure of the front member.
- An embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which:-
- Fig. 1 is a top view of the apparatus embodying the invention,
- Fig. 2 is a side view of the apparatus of Fig. l,
- Fig. 3a shows a section (on
line 3a-3a in Fig.4) and Fig. 3b a side view of parts of the apparatus of Fig. 1 on a larger scale, and - Fig. 4 is a front view of the part shown in Fig. 3a.
- Referring to the drawings, at a suitable distance below a mono-rail track from which the anode rod is suspended and which, with the rod, is not shown, there is installed the apparatus embodying the invention shown in Figs. 1 and 2. The apparatus comprises a horizontally and vertically extending rectangular frame 1, within which two horizontally movable
breaking carriages respective carriage cylinders carriages carriages - At their inner, opposed ends the breaking
carriages front plate front plates 8, 9 a vertically movable hoist, not shown, can raise or lower the anode rod suspended from it,when thecarriages rod guide 10 fixed to the frame 1 prevents the suspended anode rod from swinging excessively. - Figs. 3a, 3b and 4 show the
front plates front plate 8 carries a horizontally movable stop element in the form of a flat rectangular rod orpeg 11 which is horizontally moved by acylinder unit 12 mounted fixedly on the breakingcarriage 2. Thepeg 11 can move horizontally in aguide channel 13 which is formed in thefront plate 8 and a forward extension thereof. This construction is suitable for an anode block with two or four stubs. - Two pairs of
bearing blocks front plates guide rods rods blocks plates 16, which assembly is fixed at its extremities to a pair of vertically actinghydraulic cylinder units cylinders bearing block 15, theguide rods push beam vertical adjustment screw 26 for height adjustment relative to the track of the breakingcarriages - In operation, when an anode rod with two stubs and a Y-piece (not shown), with the side surfaces of the Y-piece parallel to the
front plates carriage cylinders carriages front plates - If the anode rod is now correctly positioned with the gap between the stubs of the Y-piece in front of the
peg guide channel 13, thepeg 11 is moved into this gap by actuation of thepeg cylinder 12. Then the four pushingcylinders push beams plates 16 and theguide rods peg 11 which restrains it from descending. Thus in principle thebeams - Because the highseparation forces which act between
peg 11 and pegguide channel 13 on the one hand and thepush beams front plates - The bottom faces of the
push beams - When the anode remnant has been pushed off the Y-piece, the anode rod is drawn upwards slightly and any residue which remains behind in the Y-piece aperture is now removed. Then the
hydraulic cylinders peg 11 is drawn back into thechannel 13, after which thebreaker carriages carriage cylinders - Although the anode remnant breaker in the embodiment here depicted and described is suitable for the case in which the anode block is connected to the anode rod by means of only two stubs (of a Y-piece),.the present invention is not limited to this case, since the principle behind the invention is equally applicable to other known types of anode block with three, four or six stubs. With anode blocks with three or six stubs (two rows of three), two stop pegs which can be moved in parallel are required; for an anode block with four stubs (arranged in a square) one stop peg is sufficient.
Claims (4)
characterised in that
said push members (23, 24) are two longitudinally extending push beams which engage the anode block on respectively opposite sides of the anode rod and said means (11) for restraining the anode rod from descending is at least one stop element movable into a location between the stubs of the anode rod and above the level of the push beams (23, 24).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8304332A NL8304332A (en) | 1983-12-16 | 1983-12-16 | ANODE RESIDENT BREAKER. |
EP19850200229 EP0191954B1 (en) | 1983-12-16 | 1985-02-21 | Anode block remnant breaker |
DE8585200229T DE3566418D1 (en) | 1985-02-21 | 1985-02-21 | Anode block remnant breaker |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8304332A NL8304332A (en) | 1983-12-16 | 1983-12-16 | ANODE RESIDENT BREAKER. |
EP19850200229 EP0191954B1 (en) | 1983-12-16 | 1985-02-21 | Anode block remnant breaker |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0191954A1 true EP0191954A1 (en) | 1986-08-27 |
EP0191954B1 EP0191954B1 (en) | 1988-11-23 |
Family
ID=26097607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850200229 Expired EP0191954B1 (en) | 1983-12-16 | 1985-02-21 | Anode block remnant breaker |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0191954B1 (en) |
NL (1) | NL8304332A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996025536A1 (en) * | 1995-02-14 | 1996-08-22 | Comalco Aluminium Limited | Butt and thimble press |
AU691397B2 (en) * | 1995-02-14 | 1998-05-14 | Comalco Aluminium Limited | Butt and thimble press |
WO2009003217A1 (en) * | 2007-06-29 | 2009-01-08 | Mkg Technologies Pty Ltd | Butt press |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8304332A (en) * | 1983-12-16 | 1985-07-16 | Delfzijl Aluminium | ANODE RESIDENT BREAKER. |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2018381A1 (en) * | 1968-09-19 | 1970-05-29 | Lindermann Maschinenfabr | |
US4217197A (en) * | 1979-07-18 | 1980-08-12 | Gewerkschaft Eisenhutte Westfalia | Apparatus for removing anode residue from anodes of electrolytic melt baths |
GB2108530A (en) * | 1981-10-29 | 1983-05-18 | Gewerk Eisenhuette Westfalia | Anode bar cleaning apparatus |
US4442593A (en) * | 1982-08-25 | 1984-04-17 | Ardal Og Sunndal Verk A.S. | Anode butt remover |
NL8304332A (en) * | 1983-12-16 | 1985-07-16 | Delfzijl Aluminium | ANODE RESIDENT BREAKER. |
-
1983
- 1983-12-16 NL NL8304332A patent/NL8304332A/en not_active Application Discontinuation
-
1985
- 1985-02-21 EP EP19850200229 patent/EP0191954B1/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2018381A1 (en) * | 1968-09-19 | 1970-05-29 | Lindermann Maschinenfabr | |
US4217197A (en) * | 1979-07-18 | 1980-08-12 | Gewerkschaft Eisenhutte Westfalia | Apparatus for removing anode residue from anodes of electrolytic melt baths |
GB2108530A (en) * | 1981-10-29 | 1983-05-18 | Gewerk Eisenhuette Westfalia | Anode bar cleaning apparatus |
US4442593A (en) * | 1982-08-25 | 1984-04-17 | Ardal Og Sunndal Verk A.S. | Anode butt remover |
NL8304332A (en) * | 1983-12-16 | 1985-07-16 | Delfzijl Aluminium | ANODE RESIDENT BREAKER. |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996025536A1 (en) * | 1995-02-14 | 1996-08-22 | Comalco Aluminium Limited | Butt and thimble press |
AU691397B2 (en) * | 1995-02-14 | 1998-05-14 | Comalco Aluminium Limited | Butt and thimble press |
US5956842A (en) * | 1995-02-14 | 1999-09-28 | Comalco Aluminium Limited | Butt and thimble press |
WO2009003217A1 (en) * | 2007-06-29 | 2009-01-08 | Mkg Technologies Pty Ltd | Butt press |
Also Published As
Publication number | Publication date |
---|---|
EP0191954B1 (en) | 1988-11-23 |
NL8304332A (en) | 1985-07-16 |
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