SA93140193B1 - Superior installation of an ELECTROLYSIS CELL with a very high capacity for the production of aluminum ALUMINUM - Google Patents

Abstract

Abstract: This invention relates to a superstructure of a very high capacity electrolysis cell for the production of aluminum using the Hall-Heroult method. Note that the cell consists of a thermally insulated metal cover. heat-insulated of rectangular parallelepiped shape, wherein said superstructure comprises at least one rigid beam placed along the longest span of the casing and resting on supports, bearing particularly the anodic frame to which on one side the current connections are attached current risers received from the previous cell in the series and on the other hand the anode rods, which are also distinguished in that each rigid beam rests only on supports placed between its ends, which are called intermediate gantries. Also, in that installation, each anodic frame is connected to each rigid beam, which includes electrolysis and mechanical connections, or connectivs to the anode completely tightly to the said anodic frame, which ensures contact and clamping with each anodic rod corresponding to it in accordance with Lateral link and place each rod in the corresponding connective link.

Description

Cy | super mount of an ultra high a8 5 electrolysis cell for producing aluminum a sia Full description BACKGROUND: This invention relates to a super mount of a high capacity cell for the production of aluminum The Hall Heroult method is used in the electrolysis of alumina in molten cryolite. Hence, the pre-cell superstructure 0 is designed to assist the various devices connected to it which are essential to the functioning of the cell and which are also of importance in its immediate surroundings; While taking up the least possible amount of space and causing the least disruption to the surrounding environment. It is worth noting that the superstructure of any modern electrolysis cell is composed by one or more horizontal beams made of steel; 0 And its limbs are carried over Jaf's legs; Which supports the devices connected to it, which include the anodic current risers and the anodic frame, consisting of aluminum rods, to which the positive electrodes are connected; cryolite and alumina charging systems (alumina stocks; shell breaker - which may encapsulate any electrolysis electrode - standard 0 distributed system; mechanics (mechanisms) for adjusting the upward and downward movement of the anodes; In many cases, channels to collect liquids flowing outward, gases, and dust emitted by the basin.It should be noted that the legs are based on the edges of the metal casing, which constitutes the electrolysis cell in the strict sense. The Ye arrangement is useful in providing the available space on the two long sides of the cell by which the process of changing the positive poles occurs. : 0 \ARY

. ade the current goal is to prepare for a steady increase in the unit full capacity (capacity of a single cell) of the cells which leads to an increase in the length of the envelope; This length may exceed 1 m for very high capacity basins operating at above 0 0 kiloampere (KA).

© Hence; In this case, the creation of the superstructure raises a difficult problem because it

It must be of sufficient rigidity to:

It bears with its own weight the positive poles and all devices connected to it, as previously mentioned

It bears the necessary force to break the scales formed by the hardened electrolyte (solid), which impedes vertical movement.

0 a for the anode (positive electrode) -;

Ensures that the distance between the positive electrode (anode) and the negative electrode (cathode) (about 50 mm) remains constant along the entire length of the coll, since the method of organizing cells requires very precise determination of the position of the anodic plane with respect to the horizontal cathode plane formed by

0 layer of liquid aluminum.

Accordingly, in order to do Ley above, the thickness of the height of the beams; Therefore, its mass is dag. The increase in height also has echoes on the height of the buildings as well as on the buildings. the cost . And finally on that; This trend in development is becoming limited very quickly.

9. Hence, for high power cells that nonetheless operate at less than 00 kiloampere (KA) a solution may be found he in adding points (load) or intermediate hazards gantries 10160601886 between legs Jegs on ends bearing horizontal beams such as those described in EP application T= 101 (USP No. 4,770,772) for the formation of a superstructure

0 Multiple or multiple outriggers. supports Yo

YYY

. : As for very high capacity cells operating at above 300 kiloampere (KA), this solution is not really applicable due to the impossibility of performing some maneuvers; especially ; while changing positive electrodes; and the risk of accidents resulting from excessive obstruction along the long sides of the © cell. In fact; it increases the number of positive electrodes; But especially with the increase in its size, Lad, for its full mass; which exceed buzzards; New difficulties appear in achieving good productivity of Aly cells, especially in the structure of Gl multiplying SAN | The supports, which has Jegs Jaf at its edges and middle vaults, as previously described.

Le 1 that this superstructure has shown by itself its incompatibility with some of the devices integrated with it ¢, which causes difficulty in accessing it; For example ; electrolysis and mechanical connection systems » or connections; For the anode rods on the .anodic frame

Therefore; The connections are commonly used on electrolyte tanks

Electrolysis 0 medium high power (1 < 300 kiloampere (KA) direct entry Bat connections are those described in US Patent No. 7,1797,10 (France Patent Application No. 74847-7 a) by means of which the insertion of the anode rod occurs before its clamping on the anode structural structure by means of the movement of that rod, which remains in a vertical position, towards its position in the

,. the anodic frame the joint along a plane perpendicular to the anodic structural plane 0 Hence, by increasing the size of the anodes, maneuvering to bring the joints closer to points at the ends and center bridges; jegs become impossible to load; In the sense that the legs, because the previous loading points are located in the path of the positive poles.

moreover; The above "direct entry" connections include a YO-mount part that is fully attached to the anodic frame which ensures the centering of the ... anode rod and a detachable part which ensures.interlocking and preventing the Gull towards.. .0 .: through

M the anodic frame once it is in its ominous position 0 and with regard to the retention of the positive electrodes with a mass exceeding the resonance, the quality of the contact edi and the clamping of the anode rod on the anodic frame structure must be J Excellent for minimizing potential difference at the rod/body interface; © And also to avoid any sliding of the anode as well as any disturbance as a result of the local change in the distance between the anode / cathode. Hence and in order to achieve this; The networking pressure as well as the size of the connections; especially for its LEN parts of the class; 1 should increase significantly. Hence, during the anode change; As the means of suspension must be prepared for temporary holding of those detachable parts - their mass 0 can reach 0” or 0 ? kilograms; thus increasing the risk of loss. male; the inventor has developed a new superstructure in association with another type of anode interface dedicated to high-capacity electrical cells; Cm Se dy vo retaining ADL ay sufficient for horizontal beams on In spite of the increase in the weight of the anodes and of some of the devices attached to them; and to do so without the height increase of the super aS Al; which would necessitate an increase in the height of the installation. To effect the anode changes without the resulting hardship on an i gall of obstruction and step loss introduced by interchangeable parts to separate the joints; and on the 0 _ other side by the asymmetry of the multi-assembly (AS) with the type of anode rod connection and to do so without lengthening the superstructure or increasing the distance between the centers of the cells; also without modification to the size at the ground level In the fixtures General description of the invention: It should be noted that while doing the tests; It has become clear that the use of middle vaults may be preferable to the use of legs at . aE > >> 0> and it is sufficient that three; Or in fact 'Four Arches' is Ciao mee YYY

. . There is a central crossbar between JS ends; in the absence of legs at the ends; To maintain sufficient rigidity for GIA installation once flexural stress as well as deformation remain acceptable for each gantry. And based on determining the number of vaults as well as the obstruction along the long sides 2 of the coll cell, the ability of the connections to reach the large positive electrodes has been significantly improved, but it was preferable to address the problem of carrying the rod of the anode pole towards the joint at the level of the middle vaults. Hence, this problem was solved by adopting a new method of connection by means of the lateral connection of the anode rods in their joint along the Ye plane parallel to the structural structure of the positive electrode; Hence, each junction remains furthermore attached to the anodic frame (of the anode); This leads to the removal of any risk of damage to the clamping parts, which become fixed in their place. more precisely; The invention relates to a superior installation of an electrolysis cell with a very high capacity for producing aluminum using the Cus ¢ Hall-Heroult method. The basin consists of a heat-insulated metal casing of parallel shape. rectangular surfaces; The structure al comprises at least one rigid beam placed along the longest span of the casing; and based on supports; And it gets special. The anodic frame, which connects on one side the electrolysis current risers coming from the previous cell in the series, and on the other side the positive rod bars; Which is also distinguished in that each solid beam rests only on supports placed between its ends ¢ It is desirable at more than 00 cm from the ends; Which are called central bridges. And that in the previous installation, each anodic frame is connected to each YO rigid beam, which includes 5 electrical and mechanical connections or 0 connections to the anode, which are completely attached to the ELs anodic frame.

v :: It includes contacting and clamping (clamping with) each corresponding anode rod following the lateral connection and placing each rod in the corresponding conductor. Brief explanation of the drawings: Figure 1 shows a cross-section of the installation of an electrolysis tank ©. | Fig. 1 shows a superior aS BY of a high-capacity cell of a known species. A figure representing the most common variations of the super-combination basin subject of the invention. 01 fig.; The superior combination sink completes the theme of the invention. Figure © Jap The type of positively bonded anode of the subject of the invention. oka and 17b represent the type of side-linked anode connections, which are; In combination with the new supercomposite; constitute the invention. In order to adhere to the true proportions (width; length of the cover), part of the length of the superstructures has been omitted in the figures ve dog ey detailed description: as in Figure 1 the basic components of the electrolysis cell have highlighted 0 i.e. metal shell 1 ; inner lining ‎cell 7; negative electrode ( cathode ) 7 ; cathode 4; aluminum layer 0 liquid © molten cryolite bath 1 hardened shell » the anodes A (anodes) suspended by bars 4 afl to the anodic skeleton 01 anodic frame by links 04 connectivs, as well as the superstructures formed by the two rigid beams 11 which support, in particular, the anodic structural structure 01 anodic frame “all the positive electrodes 8” as well as the Ye measuring and distributing instrument 11 for alumina alumina localized repository 1” which is YYV

The crossbars 11 are usually placed between them, as well as the channels for collecting the liquid flowing from the cell, which were not indicated. JSS? shows the structure of a cell of a known type; 11 for the casing 1 as well as the solid beams rigid beam 11 which form the structure ga and its ends rest on the legs logs ??which is placed on a vertical end of the basin while its center is carried on a central bridge VY the same for it ? or VA legs which rest on the upper Jad rim 10 of the casing at its central part.

14 connective 0 that holds the rod 4 of the anode 56 against the anodic structural structure 01 anodic frame after carrying it and placing the rod kept in a vertical position towards a plane perpendicular to the plane of the anodic frame that passes through the link Y £ connective.

The © figure represents one of the embodiments of the superstructure subject of the invention which includes

0 on two rigid beams 11 with a profile in the form of a letter, placed on at least two bridges VY, each of which includes two support beams crosswise V8 resting on at least two legs VA Togs, as the cross beam Shown in the picture with a tubular profile of square section may also be formed by any solid profile eg as the letter 1 7 or 7 .

Y intermediate gantries for the two intermediate drops YA legs, and in that case the legs 0 are electrically isolated ly of the upper Vo cover) rim resting on the rim of it. Hence, the previous support system must be It takes into account the electrolysis number

| The metal casing is Jal ¢, especially in the transverse direction, and it does not really constitute a fixed point for support. Moreover, it is necessary to provide freedom of movement. YO for that bracing in the direction of extending the casing; That is, in general, the Jal direction that passes through the Potline protection lines, which are placed crosswise, according to the coverage axis: 2 0 YYY

. Hence, in order to create this protection, it is necessary to provide means that allow the relative movement of the support relative to the casing at the level of the rim 10 of the supports that slide or fold PY such as latches or rolling wheels. It is equally possible to obtain that protection by a hinged© system; Representative oof JCal includes; For each arch 17 on one of the algals, leg A is articulated on the VO rim around a fixed axis parallel to the main axis AA of the basin; On the other hand, a movable leg formed by means of a lever or | rocker 81b articulated articulated on one of its ends on a rim rim im 10 around a fixed axis lind parallel to the main axis 0 of the basin and at its end AY) around the axis A movable joint with the AY end of the 19 supporting beam of the arch. It should be noted that the support of the VA legs of the arch can also take place outside the casing on special elements; For example, a supporting body or reinforced concrete columns 0. Hence, this arrangement avoids the problems of chemical isolation, electrolysis 1, and the transverse expansion of the cell, but it reduces the space between the basins. It is worth noting that if the conventional model of longitudinal beams 11 includes profile 1; It is advantageously possible to replace each profile 1 with a mechanically welded set of two square-section tubular profiles; Rectangular or round NY and 11b are kept parallel by means of a strut that acts 0 as legs 8 loading 11c in a tubular or solid side having a square section 0” rectangular or round. Hence, that installation; shown in Figure 4; Provides excellent rigidity and shows the advantage of leaving YY holes between the legs of the Loading Togs (11C) to pass mechanical and electrolysis joints; Especially cross-sections with a gallon equivalent YA to ensure precise electrolysis and mechanical equilibrium between the 01 anodic frame YO in the direction of current and in the opposite direction of current for the same cell VY YV

0 The invention also relates to the construction of a superstructure with rigid longitudinal beams 11 which are not connected; Meaning that it consists of at least two separate parts; Each of them rests on at least two VY intermediate gantries. Hence, this structure (not shown) allows determining the flexural forces that are exerted on the beams Als Brigid beam VY; But above all to simplify the building; transport and erection of such beams; Hence, by using that method; The superstructure can also be formed by assembling the elements of CASH | It should be noted that the loading of the continuous and non-continuous long parts (eV) 11b on the intermediate gantry 11 intermediate gantry is dale by means of mas 0 by absorbing the slight relative movements of the supports of the beams on the gantry. Hence, a simple solution is to allow the bearing faces of the longitudinal beams to rest freely on the supporting beams of the intermediate gantry. combination 0 upper; especially for anodic structural installations 01 anodic frame; That the aforementioned has been placed above the intermediate gantry, as shown in relation to figures “and 4; In addition to those placed in the transverse beams of the intermediate gantry shown in the figure? . It should also be noted that, as in the case of long rigid beams 11-, the anodic frame structures 01 0 which are long bas can be installed in two parts in order to distribute the expansion on both sides of the upper installation center. where an extension joint is placed; For example ; a closed electrolysis circuit of aluminum strips or other similar means between the two parts which furthermore guarantee electrolysis 0; It is preferable to place the inlet member of the current YA coming from . Yo cell upstream to the right of the 017 intermediate gantries which can be said to be in the same direction as the vertical plane of the gantries.; Also the tortillas. Co. VYY

11 | the flexible metal 0, which ensures the electrical conductivity, electrolysis, between the insertion member, z? And the anodic structural structure 01 anodic frame is attached to the structure in 0 shaded area in the drawing and that is the maximum amount of space for positive (lL) change operations along the long sides of the cell (cell °) and it should be noted that the previous arrangements The basic elements of the assemblies have been designed to ensure effective service for the basins with very high capacity. It is necessary to supplement them with special modifications for the means of electrolysis and mechanical connection: for the 9 rods for the positive electrodes. Determine the appropriate subjects and retain the 0 > positive electrodes of large sizes by interlocking them. The new connective connector V4, which allows the placement of the 4 bars of the positive poles by means of a lateral connection in the connector connector prepared for this purpose and which is completely fixed to the anodic structural frame and integrated with the new upper assembly, solves and efficiently. Problems with the placement and networking of the rods of the large anodes. According to the figure ©; the connective link; The former is formed by means of a metal frame 11 metallic chassis fixed to the anodic structural assembly 01 anodic frame - by means of a connecting bolt or any solid means of fixing Goal 1? The metal chassis is defined by two parallel plates 11 0b and its upright supports 17d that include a side cavity, which is; together with the anodic structural composition. 01 anodic frame 01 ¢ housing YE into which rail 4 of anode 56 is placed. And whoever smells the positive pole; preserved in a vertical position first moves along a plane perpendicular to the structural structure of frame 0008 and at a distance of at least half the width of the anode away from the edge of the nearest central bridge; After that, it moves along a plane parallel to the anodic frame towards the YE side housing of the Cua connective, then descends down towards the bathroom and sets the required level 0 according to the anodic level. The sign is gendered (de) YYY

B. The anode rod is then clamped to the anode frame using appropriate clamping devices attached to the metal frame 11 so that the metal frame system / anchors that form the connective are completely attached to the anodic frame. Z ° It should be noted that the preferred meshing means in 1 JI a 11 Ab are formed in particular by means of two YY levers that are flexed around a common pole Yo ; fixed to the upright support 11c of the chassis; As its separation is regulated at its free ends by means of two nuts 177; 7b and a screw comprising two parts having threads YY ALE by turning the screw head Yo . Whereas each crane head 167 on the 0 side of the fixed axis 1 shall be equipped with a lattice piece or a lag cross piece; "?d which is carried over the entire width of the lever towards the anode rod Lovie. The levers are separated Tevers according to the position shown in figure ?a. In contrast, the assembly of the levers is as shown in Figure B causes the disassembly of the transverse segments 77c-17d and the dissolution of the anode tod ve. It should also be noted that due to the fact that the y axis of rotation of the lever is considered constant ¢, the distance of the two-part screw has Two opposite spiral bolts from the axis of rotation during the assembly of the levers together should not conflict, and in order to achieve this, it is necessary to provide rectangular holes at the ends of the rods to pass the bolt that includes two parts that have opposite threads and nuts. 0 of its Allg is moving when transported.: It should be noted that the YT clamping devices, except for the previously described ones, are part of the invention, which are mentioned once they are fully integrated into the metal structure 01, allowing the lateral entry of the anode rods In connection 01 connective, which is completely fixed to the anodic structural structure: .Yo and finally; The invention makes it possible to take into account the curvature of the Cased 0 as a result of differential thermal expansion. lle that A le is the horizontal accenting Ce | Analyze

: 1 VY of the bridge is subject to thermal changes, which is a function of the alumina coating of the positive electrodes. alumina anode change of the anode oli temperature achieved Jef It should be noted that in the vicinity of; to that specific girder; As this change causes the scale to break at about the electrolyte, the solidified 0' electrolyte © radiates directly over the upper structure. a 41. — ay. . It should be noted that the temperature gradient between the upper and lower face of the beam causes its bending. Hence, even if that curvature is not compatible with the regularity of the basin, it is necessary to reduce the temperature gradient. Accordingly, the setting is to clarify the support points for the arch on the cover if the extension phenomena are considered similar. 0 One or more of the following solutions may be used to influence or lla and from this to act on the different factors that cause bending. _Materials . The crossbar may be made of nickel steel; Where its expansion is equal to that of ordinary steel. b) Heat removal by air circulation. Heat can be removed by circulating Vo air into or around the beam. Closed tubes containing . Caloduc c) The removal of heat by means of a liquid at the limit of the evaporating temperature placed in contact with the lower part of the beam at one end on the outer part of the basin at the other end. Whereas in the tube; gas the heat of the exposed face of the crossbar vaporizes the liquid; Gas 9 rises and condenses in the outer part; Getting rid of heat. D) Equilibrium in temperatures. A thermal bridge may be installed between the lower part of the beam and its upper face. It should also be made of aluminum, which is a good thermal conductor like aluminum

(VE) —( Thermal Shield 0 Installing a reflective shield and/or thermal insulator around the crossbar that holds the crossbar from 1 to 21 sudden thermal radiation during anode change. Hence, the invention is in various embodiments previously described ° overcomes one of the most serious obstacles for the production of ponds with a capacity of 000 kg u.d.; its economic advantages are considered very attractive. vYy 0

Claims (1)

vo: lal elements -1! Super structure of an electrolysis cell with high capacity faa ¥ aluminum production using the Hall-heroult method. Note that the cell ¥ consists of a metal shell (1) heat-insulated with a parallelepiped - rectangular shape, as the aforementioned superstructure includes at least a solid beam. M | (11) rigidbeam One is placed along the longest extension of the casing and rests on 4 casing supports, and carries in particular the anodic frame vy (01) to which current risers (79) from A is the previous cell in the series and on the side a) positive pole rods 4 (anode (3) which is also distinguished in that each rigid beam (11) rigid beam 0 is focused only on supports casing placed between its two ends, which is called yy intermediate (VY) intermediate gantries Also, in that structure, each structure 1 is an anodic frame connected to each rigid beam Jay rigid beam 1" on electrolysis and mechanical conductivity or AN (1£) connectivs Anode 4 fully bolted to the aforementioned anodic frame which ensures Vo contact and grip Clamping with each anode rod corresponding to it following - lateral linkage and placing each rod in the link (YA) legs Jays for connective 1" for each middle bridge resting on the rim of the casing by means that allow displacement VA Relative of the support to the cover. 1 ?- Superior composition in accordance with Clause 1; It is distinguished in that each (VY) XY center span includes a supporting beam (V4) resting on at least two (YA) legs da Ngee ¥ SBF superimposed in accordance with claim no. ? ; Which is distinguished in that the supporting beam (14) is made of a tubular side with a square section; + rectangular or round. : 0 Rala 1 +;- superior composition according to Clause 7; Which is distinguished in that the supporting beam (14) as well as the legs are Jia in the form of “letter 1 + 2” or “U” solid 1 *- super installation Ty For the element of protection No. 1; to; which is distinguished in that the means that allow the relative displacement of the propaganda with respect to the cover are represented by a rolling wheel or v-sliding supports. Protection Elements No. 1 to; (WA) on the edge of the rim (10) around a fixed axis; on the other side a movable leg formed by means of a lever or articulated (VA) rocker (VA) articulated 1 on one side on The edge of the rim on its other side around an axis joint with the side of the transverse support beam.) 10( supporting beam 1 7- Superior installation according to the protection beam No. (YA) support of the legs of the intermediate gantry ¥ occurs on the outer part of the sheath over certain organs. 1 +” Superior Composition pursuant to Clause 1 to 4; Which is distinguished in that the beams (YY) rigid beam al ay, which are longitudinal, are considered as sides in the form of a letter 1 1 solid 1 . 4- Super installation according to protection element No. 1 to 4; Which is distinguished in that each z-beam is solid (11) rigid beam, which is longitudinal by means of two tubular sides or “solid” (11 11b) of square section; oblong or round; so that it remains; It is paralleled by means of casing supports or support legs. (11c) solid-sided or tubular of square section; rectangular or oblong. . a man 1 01 Superior Composition in accordance with Claim 1 to 4; Which is distinguished in that the rigid ¥ beams (11) rigid beams, which are considered longitudinal, are non-rigid and consist of at least two parts, each resting on at least two intermediate drops (VV) intermediate gantries -11-1 super structure. Ey for protection element No. 1 to ;, which is distinguished in that the members of Y enter the current (V4) current coming from the counter-current basin as well as the flexible “Agama” chips (Fo) and ensure the connection of the input members precedent (Y) and that the structural + anodic (V+) anodic frame is positioned in a vertical plane perpendicular to |© this primary axis of the basin by passing through the intermediate gantry (SEY). Pursuant to any Claims 1 to; ; Which is distinguished in that the X supporting beams (19) of each intermediate gantry | include at least one means of protection against thermal radiation 1 0 from the electrolyte bath (SENT) Superior ly to protection element No. 1 1 which is distinguished in that the anode connectivs 7 (¢ ) ) which are fully fixed in the anodic frame (V+) ¥ are considered a special problem of a metal structure (V1) metallic chassis, the aS lly stabilizer, the anodic frame, and the clamping means (Y1) for the anode rods are installed inside it .anode ° -14 1 Superior mounting according to claim No. VY which is characterized in that the metal frame “VY” which is fixed to the anodic frame by means of ¥ rigid anchors (YY) It is bounded by two parallel plates (Ve IVT); - and its uprights (11c) which comprise a lateral cavity in which together is the anodic frame (Y£) of the anode rod. 1 8- Superior installation of an electrolysis cell with a capacity of very i lle 7 to produce aluminum using the Hall-Heroult method, noting that the cell ¥ consists of a metal shell) 1) Heat-insulated with parallelepiped shape. YYVY. : 'A ;. rectangular ; Whereas, the aforementioned upper structure includes eating on one rigid beam placed along the longest span of the casing and resting on (YY) rigidbeam © anodic frame 48″ supports, and bearing in particular the anodic structural structure 1 (¥4) current risers which It is connected to it on one side of the current connectors (01) 7 previously in the series, and on the other side the pole rods of the cell coming from the positive cell A (11) rigid beam (the anode (3), which is also distinguished in that each beam is solid 4 called an ally riser placed between its two ends; (V+) anodic frame 1" (10) anodic structural connectivs and mechanical or electrolysis connections comprising the electrical connection of the aforementioned yy which the anodic frame to the anode 6 is fully attached to the anodic structural arrangement 4 opposite to it anode rod with each anode clamping and gripping contact Yo 1 legs include the corresponding ¢ and connectivs following the lateral connection and place each rod in the connections 1 casing by means of means rim of each center bridge resting on a hub (YA) vy, which is formed (V1) by the relative displacement of the support relative to the casing ¢ operating means 01 fixed to upright columns (01) axis joint dipped sequentially on (YY) axis by two levers 14 be (01) the axis constant of the metal structure; whose heads are; On the axle side (C11) 0 (3) which is carried towards the rod (YY; VY) and is equipped with stabilizers or cross-pieces vy for the anode when the two levers are separated. (vy GES FT) according to the waist Protection No. 06; Which is distinguished in that the jaws of the levers, y, are set at their free ends (77a “(VY) by means of two loads (VY YY) and by means of a “© screw that includes two parts Ld opposite threads. -17 1 Superior installation According to the element of protection No. Ve, which is distinguished in that the connectionsivs ¥ the positive electrode (VE) which are fully attached to the anodic structural structure (Y +) “anodic frame v consists of a special (01) metallic chassis YYV Stabilizer: ; With the anodic frame ¢ and inside it the clamping devices (Y7) for the anode rods are fixed. -18-1 Superior composition in accordance with Claim No. VY; Which is distinguished in that the separation (dismantling) of the Y levers is set at their free ends (YY “TYY) through the two nuts (7?” (YY Y) and by means of a screw that includes two parts with opposite threads YY : AR