EP0431313B1 - Recipient pour électrolytes corrosifs - Google Patents

Recipient pour électrolytes corrosifs Download PDF

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Publication number
EP0431313B1
EP0431313B1 EP90120914A EP90120914A EP0431313B1 EP 0431313 B1 EP0431313 B1 EP 0431313B1 EP 90120914 A EP90120914 A EP 90120914A EP 90120914 A EP90120914 A EP 90120914A EP 0431313 B1 EP0431313 B1 EP 0431313B1
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EP
European Patent Office
Prior art keywords
set forth
container
further characterized
resin
end wall
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.)
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EP90120914A
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German (de)
English (en)
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EP0431313A1 (fr
Inventor
John O. Harry
George Verhagen
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Corrosion Technology Inc
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Corrosion Technology Inc
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Priority claimed from US07/431,526 external-priority patent/US5037520A/en
Priority claimed from US07/442,593 external-priority patent/US5079050A/en
Application filed by Corrosion Technology Inc filed Critical Corrosion Technology Inc
Publication of EP0431313A1 publication Critical patent/EP0431313A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features

Definitions

  • This invention relates to containers for highly corrosive solutions and more particularly to containers for use in the electrolytic refinement or electrowinning of metals such as copper.
  • a substantially pure copper anode is immersed in a suitable electrolyte, such as, a hydrochloric or sulphuric acid solution.
  • a suitable electrolyte such as, a hydrochloric or sulphuric acid solution.
  • the copper is deposited in a pure form on a cathode when an electric current is passed between the electrodes.
  • One type of prior art container employed for such electrolytic cells consists of an open concrete shell having end and side walls, a bottom and a lead or plastic lining. Spent electrolyte in the cell is replaced by introducing fresh electrolyte at one end of the cell and beneath the electrolyte's surface. At the opposite end of the cell, the spent electrolyte flows into an overflow box from which it is drained by an overflow pipe. Fresh electrolyte is normally fed into the cell at temperatures of about 60-71°C (140-160°F), while the spent electrolyte in the cell will normally be at a lower temperature. It is important to withdraw the colder, spent electrolyte since it tends to solidify at about 50°C (120°F).
  • Prior art cells were not wholly satisfactory because either the method of introducing electrolyte did not insure even distribution of fresh electrolyte along the bottom of the vessel or easily damaged piping was employed.
  • Prior art vessels were also unsatisfactory because the overflow and decanting pipes were susceptible to physical damage, particularly during loading or unloading of cells with anodes and cathodes.
  • Prior art containers were also not wholly satisfactory because the linings often failed resulting in concrete failure before the leaks were detected resulting in the loss of slimes and electrolyte. For this reason, prior art concrete cells required high maintenance, high repair and replacement costs and caused excessive downtime and lost production.
  • the iron reinforcing bars provide a leakage path for stray electric currents which reduced current efficiency and affected cathode quality.
  • prior cells tended to absorb highly toxic materials, environmental concerns result in high disposal costs.
  • One prior art effort to improve such electrolytic cells included a shell fabricated from a mixture of about 20 percent resin and 80 percent various aggregates such as pea size gravel, fine silica sand, silica flour and 6.35 to 3.17 mm (one-quarter to one-eighth inch) chopped fiber glass strands. These prior art cells had the disadvantage of relatively high fabrication costs, and a susceptibility to short circuiting as a result of the use of reinforcing rods which include ferrous materials. Another disadvantage of prior art cells was that the molding process by which they were formed resulted in cold joints, irregular internal surfaces and required that overflow boxes be separately attached.
  • EP-A-0170740 there is disclosed a composite material suitable for use in making containers or structures exposed to corrosive chemical attack.
  • a composite material is achieved by mixing a synthetic plastic resin material with two different hardeners and employing a filler of particulate siliceous material which may be sand, gravel, quartz stones or the like.
  • the synthetic resins employed may be selected from the group comprising vinylester, polyester, bisphenol, epoxy and isophthalic resins.
  • US-A-3682809 there is known an electrolytic cell constructed for high circulation and uniform flow of electrolyte.
  • Said electrolytic cell comprises at least one vertical input pipe having inflow orifices at intervals along its height and which is directed lengthwise for the input of electrolyte to said cell.
  • US-A-2816070 discloses an electrolytic cell tank construction according to which fresh electrolyte is introducted by pipes which extend downwardly into the cell.
  • US-A-3409536 discloses a container for corrosive electrolyte wherein an overflow box is provided with drain pipes.
  • a further object of the present invention is to provide a container for electrolytic cells which has a longer life and lower maintenance costs, and is easier to maintain and install than prior art cells.
  • the present invention comprises a method of manufacturing the container according to the present invention. Said method is defined in claim 23 with further preferred embodiments as claimed in claims 24 to 29.
  • a cell 10 according to the preferred embodiment of the invention is shown in the drawings to include a bottom 12, side walls 13 and 14, and end walls 15 and 16, only one side wall being seen in FIGURE 1.
  • the cell may be formed of any suitable material such as the polymer concrete disclosed in U.S. patent No. 4,885,072.
  • the inner and outer surfaces of the cell may be coated with a corrosion-resistant lining as will be discussed below.
  • a matrix of reinforcing bars 17 of a nonconductive material, such as FRP fiber glass, is disposed in the bottom 12 and extends up the side and end walls 13, 14, 15 and 16 as reinforcement against damage.
  • An overflow box 18 is provided in a semi-cylindrical formation 19 integrally molded on the outer surface of end wall 16 and intermediate its ends and extending from its top to its bottom.
  • the overflow box 18 is defined by a recess 20 formed in the inner portion of formation 19 and opening into the interior of the cell 10 and extending downwardly from its upper periphery.
  • an overflow pipe 21 is cast and extends vertically from the recess 20 downwardly through the lower end of formation 19 and is open at its opposite ends.
  • the interior of the cell 10 communicates with the overflow pipe 21 at a point spaced above the lower end of the cell. Normally, when the cell is full, a plug 26 is disposed within opening 24.
  • channel member 32 is suitably fixed over channel 30 to define a closed, hollow passage 34 therewith.
  • channel member 32 has a flange 36 affixed to each side and extending along its length.
  • the flanges 36 are fixed to the inner surface 31 of end wall 15 in any suitable manner such as bolts 38 which extend through openings in flanges 36 and are received in a plurality of metallic inserts 39 having internally threaded openings and molded into wall 15 in spaced apart relation along the sides of channel 30.
  • Channel cover 32 extends from the upper to the lower ends of wall 15 and there is an opening 41 at its lower end which corresponds to the arcuate surface 42 at the lower end of channel 30.
  • the integral overflow box 18, discharge pipe 21, and decanting passage 24 according to the invention along with the inlet channel 30 and cover 32 eliminate exposed piping employed in prior art cells, and thereby substantially minimizes damage and maintenance expense.
  • the height of the upper end of pipe 20 may be extended by means of a fitting 50 and an extension pipe 51.
  • the fitting 50 is telescoped over the end of pipe 21 and has an integral flange 53 on its inner surface which engages the upper peripheral edge of pipe 21.
  • Extension pipe 51 has a pair of spaced apart peripheral grooves 55 and 56 in its outer surface for receiving a ring 58.
  • ring 58 will be disposed in either the lower or upper grooves. After ring 58 has been positioned, it is force fit into fitting 50 so as to fix the extension 51 in position and to seal its outer periphery. It will be appreciated that if a lower height is desired, ring 58 will be positioned in the upper groove 55. In addition, if greater height is desired, the upper portion of pipe 51 can be extended.
  • FIGURE 7 shows an alternate embodiment of the cover for channel 30.
  • cover 62 is relatively plainer so that it does not protrude into the interior of the cell.
  • FIGURES 8 and 9 show an alternate embodiment of the invention wherein the inlet passage is cast into the end wall 15.
  • the inlet channel is formed of a pipe 70 cast into wall 15 and having manifold pipes 72 and 73 extending laterally from its lower end and in general parallelism with wall 15.
  • Each manifold pipe 72 and 73 has a plurality of laterally spaced apart pipe sections 75 extending in a direction parallel to the bottom 12 and opening into the cell 10. This provides a more even distribution of fresh electrolyte along the bottom 12 of the cell than can be achieved with the embodiment of FIGURES 1-7. While two pipe sections 75 are illustrated, it will be appreciated that any suitable number or size may be employed without deviating from the invention.
  • the diameters of the pipes 75 are greater than that of the pipes 73 as shown in FIGURES 8 and 9.
  • FIGURES 10 and 11 Another embodiment of the overflow pipe extension is shown in FIGURES 10 and 11 to include a cylindrical member 80 which is telescopingly received within overflow pipe 21.
  • a flange 82 extends outwardly from member 80 to divide member 80 into a first portion 80a and a second portion 80b.
  • the flange 82 has a diameter greater than that of the pipe 21 and is closer to one end of the adapter 80 than the other so that the portion 80b is longer than the portion 80a.
  • the portion 80b of member 80 is inserted into pipe 21, the upper end of the extension will be at a first height while if portion 80a is disposed within the pipe 21, the upper end of the extension will have a second, higher elevation. In this manner, the upper end of the overflow pipe can be conveniently adjusted.
  • Electrolytic cells of the type discussed above must be nonporous and possess sufficient mechanical strength and must be chemically inert relative to the electrolyte which comprises a sulfuric or hydrochloric acid solution.
  • a cell with which the present invention may be used comprises a mixture of 10%-19% by weight of a modified vinylester or polyester thermo-setting resin, and the balance consists of a mixture of crystalline silica particles, and particles taken from the group consisting of mica flakes, glass beads and chopped fiber glass strands.
  • the vinylester or polyester resin is thinned to reduce viscosity and permit higher filler loading.
  • the viscosity of the vinylester or polyester resin should be less than 200 CPS as measured by a Brookfield viscosity meter Model LVT at 25°C (77°F) with a 13 spindle at 60 RPM.
  • the components by weight of the modified vinylester resin are as follows:
  • Any suitable inhibitor such as 2.4 pentanedione may be employed and any suitable degassing agent such as xylene or acetone may be used.
  • the dry mixture comprises:
  • the resin acts as a binder for the dry materials and fills the interstices therebetween so that the container is impervious to the electrolyte solution and forms a corrosion-resistant material unaffected by the electrolyte solution.
  • the chopped fiber glass strands, mica and/or glass spheres provide a tighter composite material which also reduces porosity and increases physical strength.
  • the nonconductor reinforcing bars increase physical strength and allow the cells to be supported in only two areas if necessary.
  • coating 125 consists of a backing layer 126 consisting of 20%-30% by weight of an inorganic fiber reinforcement and 70%-80% by weight of pure polyester or vinylester resin.
  • the fiber reinforcement may be a mat of fiber glass strands 12.7-50.8 mm (1/2"-2") long or a light cloth of fiber glass or other synthetic fiber.
  • Nexus veil One such material is called Nexus veil.
  • the container according to the preferred embodiment of the invention is formed by applying to the surface of the mold a face layer of polyester or vinylester thermo-setting resin 10-20 mils thick, applying to the coating a backing layer of about 20%-30% by weight of an inorganic fiber reinforcement and about 70%-80% by weight pure polyester or vinylester resin, mixing polyester or vinylester resin and dry ingredients, all identified by the reference numeral 128, and then pouring the same continuously into the inverted mold 130 and onto said backing layer 126.
  • the face coating 127 adheres to the surface of the mold 130, it is applied in the form of a gel coating either by spraying or rolling.
  • One material that has been used successfully is Grey vinylester, code AG-00003B sold by Co-Plas, Inc.
  • the fiber reinforcement may comprise a fiber glass mat formed of strands 12.7-50.8 mm (1/2"-2") long or a light cloth of fiber glass or other synthetic material.
  • the mixture, backing layer 126 and face coating 127 are then allowed to cure at room temperatures. Because an inverted mold is used, the inside bottom, side and end wall surfaces of the face coating are in contact with a smooth mold surface. Accordingly, these surfaces will also be relatively smooth without troweling. This permits continuous casting of the cell to insure that no cold joints are formed. Furthermore, because curing of the resin is air inhibited, the exposed surface layer 127 cures only when the resin and backing layer are allied so that air is excluded. Similarly, the exposed surface of layer 126 will cure only when the resin and and filler 128 are poured. As a result, molecular bonds are formed between the layers 126 and 127 and 126 and 128. These bonds form when air is excluded from the interface of adjacent resin layers and the same cure.
  • Casting the cell upside down also facilitates the casting of an integral overflow box with the cell.
  • greater physical strength is achieved over prior art cells where the overflow box was cast separately and then attached to the cell. This prior art method caused leaks and made the overflow box susceptible to mechanical damage.
  • a cell wall thickness of about 63.5 mm (two and one half inches) at the top and 76.2 mm (three and one half inches) at the bottom is satisfactory for a conventional cell which is about 4.9 m (sixteen feet) in length, 1.4 m (four and one half feet) in height and 1.4 m (four and one half feet) in width.
  • Conventional concrete cells have a wall thickness of about 14 to 16.5 cm (five to six inches).
  • a typical electrolytic refinery has capacity of approximately 120,000 tons per year. This capacity could increase, for example, by approximately 3,170,000 Kg (7,000,000 Pounds) Per year with the additional internal cell capacity.
  • the operating temperature of some prior art cells was limited to about 71°C (160°F) because the plastic linings employed tended to lose shape and reduce useful life at higher temperatures.
  • higher current densities and temperatures can be employed, thereby increasing production rates, quality and capacity.
  • Bars of elongate and preformed nonconductive material such as, for example, precured fiber glass are preferably inserted into the bottom and side walls and corners of bottom-side and bottom-end wall corners of the container as the same is being poured thereby substantially increasing the physical strength properties and minimizing the possibility of electrical short-circuiting due to the use of metallic reinforcing bars in prior art containers.
  • Such reinforcing lap boards which support the bars permit the electrodes to be mounted directly on the cell wall, thereby eliminating the necessity for an insulating board as in prior art devices.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Secondary Cells (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Table Devices Or Equipment (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Laminated Bodies (AREA)
  • Conductive Materials (AREA)
  • Hybrid Cells (AREA)

Claims (29)

  1. Cuve pour électrolyte corrosif utilisée dans un procédé, ladite cuve consistant en une coque de béton de résine synthétique durcie et comportant des parois latérales (13, 14), une paire de parois d'extrémité opposées (15, 16) situées entre les parois latérales, et un fond (12), chacune desdites parois d'extrémité comportant une surface intérieure et une surface extérieure, une boite de débordement (18) comprenant une cavité (20) et, dans la cavité (20), une ouverture d'extrémité débouchant dans l'intérieur de la cuve (10), à l'extrémité supérieure de l'une des parois d'extrémité et en-dessous du bord supérieur de celle-ci
    caractérisée en ce qu'
    il existe un passage d'évacuation (21) qui s'étend verticalement dans l'intérieur de l'une des parois d'extrémité (16), et qui est entièrement recouvert par la paroi d'extrémité, le passage d'évacuation comportant une extrémité supérieure débouchant dans la cavité (20) et une extrémité inférieure ouverte à l'extrémité inférieure de la paroi d'extrémité, qui débouche à l'extérieur de la cuve.
  2. Cuve selon la revendication 1,
    caractérisée en outre en ce qu'
    il y a un second passage (22) qui est situé dans la paroi d'extrémité (16) qui s'étend généralement horizontalement à partir de la surface intérieure de la paroi d'extrémité jusqu'au passage d'évacuation (21).
  3. Cuve selon la revendication 2,
    caractérisée en outre en ce que
    le passage d'évacuation (21) comprend un premier tube incorporé dans la paroi d'extrémité et que ledit second passage comprend, dans ledit tube, une jonction en T qui s'étend jusqu'à la surface intérieure de ladite paroi d'extrémité (16).
  4. Cuve selon la revendication 1,
    caractérisée en outre en ce qu'
    il y a un second passage réalisé dans la seconde paroi d'extrémité et dans la surface intérieure de celle-ci, ledit second passage s'étendant à partir de l'extrémité supérieure de ladite paroi, vers le bas, jusqu'à un emplacement situé à proximité de son extrémité inférieure.
  5. Cuve selon la revendication 4,
    caractérisée en outre en ce que
    le second passage comprend un canal réalisé dans la seconde paroi d'extrémité et sur la surface intérieure de celle-ci, et en ce qu'un élément de recouvrement est disposé au-dessus du canal et comporte une ouverture à proximité de ses extrémités supérieure et inférieure, l'élément de recouvrement et le canal définissant le long de la surface intérieure de la paroi extérieure un passage vertical, qui est ouvert à son extrémité supérieure et à proximité du fond du compartiment.
  6. Cuve selon la revendication 4,
    caractérisée en outre en ce que
    le second passage est défini par un tube moulé dans ladite seconde paroi d'extrémité et en-dessous de la surface de celle-ci, le tube définissant à l'intérieur de la seconde paroi d'extrémité un passage vertical qui est ouvert à son extrémité supérieure et à proximité du fond du compartiment.
  7. Cuve selon la revendication 6,
    dans laquelle existe dans l'extrémité inférieure du tube une multiplicité d'ouvertures, espacées les unes des autres à proximité du fond du compartiment, grâce à quoi il est possible de disperser de l'électrolyte de renouvellement le long du fond du compartiment.
  8. Cuve selon la revendication 7,
    caractérisée en outre en ce que
    les moyens formant une multiplicité d'ouvertures sont définis par une paire de moyens formant un collecteur de tubes disposé dans ladite seconde paroi d'extrémité et à proximité de l'extrémité inférieure de celle-ci, chacun des moyens formant un collecteur de tubes comportant une pluralité d'ouvertures qui sont espacées les unes des autres et qui communiquent avec ladite cuve.
  9. Cuve selon la revendication 5,
    caractérisée en outre en ce que
    l'autre paroi d'extrémité comporte une formation sur sa surface extérieure correspondant au canal, s'étendant à partir de son extrémité supérieure jusqu'à son extrémité inférieure, de façon telle que le canal ne diminue pas l'épaisseur relative de la paroi d'extrémité à l'emplacement dudit canal.
  10. Cuve selon la revendication 9,
    caractérisée en outre en ce que
    le canal a une surface courbe à son extrémité inférieure orientée vers l'intérieur, l'ouverture située à proximité de l'extrémité inférieure dudit élément de recouvrement étant située en face de ladite surface courbe, l'électrolyte délivré dans ledit passage s'écoulant, de ce fait, vers le bas le long dudit canal et étant réorienté par ladite surface courbe vers l'extérieur de ladite ouverture, en vue de la répartition de l'électrolyte le long du fond du récipient.
  11. Cuve selon la revendication 10,
    caractérisée en outre en ce qu'
    il existe un troisième passage réalisé dans la formation et s'étendant généralement horizontalement à partir de la surface intérieure de la paroi d'extrémité jusqu'au passage d'évacuation.
  12. Cuve selon la revendication 11,
    caractérisée en outre en ce que
    le passage d'évacuation est défini par un premier tuyau incorporé dans ladite formation, et en ce que ledit second passage est constitué d'une connexion réalisée dans ledit tuyau et s'étendant jusqu'à la surface intérieure de la paroi d'extrémité.
  13. Cuve selon la revendication 1,
    comprenant des moyens de prolongement couplés de façon réglable à l'extrémité supérieure des moyens formant passage d'évacuation afin de rallonger lesdits moyens formant passage au-dessus du niveau de la cavité.
  14. Cuve selon la revendication 13,
    dans laquelle les moyens formant passage d'évacuation comprennent des moyens formant tubes incorporés dans ladite formation et s'étendant à partir de son extrémité supérieure jusqu'à son extrémité inférieure, les moyens de prolongement comprenant un petit tronçon de tube, et des moyens formant bague entourant le tronçon de tube, destinés à se mettre en prise avec l'extrémité supérieure desdits moyens formant tube afin de supporter le tronçon de tube et de jouer le rôle de joint sur la périphérie extérieure de celui-ci, le tronçon de tube augmentant la longueur des moyens formant tube au-dessus de la cavité.
  15. Cuve pour électrolyte corrosif selon la revendication 2,
    caractérisée en outre en ce qu'
    une couche résistant à la corrosion est mise en place et en ce que celle-ci comprend une couche avant réalisée en un matériau choisi dans le groupe constitué par les résines d'esters de vinyle et par les résines de polyester, et une couche de renfort consistant en une fibre inorganique imprégnée d'un matériau choisi dans le groupe constitué par les résines d'esters de vinyle et par les résines de polyester.
  16. Cuve selon la revendication 15,
    caractérisée en outre en ce que
    la couche de renfort contient environ 20 % à 30 % en poids de fibre et environ 70 % à 80 % en poids de résine.
  17. Cuve selon la revendication 16,
    caractérisée en outre en ce que
    la fibre inorganique est de la fibre de verre sous forme de mat.
  18. Cuve selon la revendication 16,
    caractérisée en outre en ce que
    le mat est constitué de brins d'une longueur de 12,7 à 50,8 mm (1/2 pouce à 2 pouces).
  19. Cuve selon la revendication 17 ou 18,
    caractérisée en outre en ce que
    la couche avant a une épaisseur d'environ 0,25 à 0,50 mm (10 à 20 mils).
  20. Cuve selon la revendication 17,
    caractérisée en outre en ce que
    le béton de résine synthétique comporte 10 % à 19 % en poids d'une résine choisie dans le groupe comprenant les résines d'esters de vinyle et les résines de polyester, thermo-durcissables.
  21. Cuve selon la revendication 18,
    caractérisée en outre en ce que la résine modifiée comporte 80 % à 90 % d'une résine choisie dans le groupe constitué de résines d'esters de vinyle et de résines de polyester, le complément consistant en un diluant, des inhibiteurs, des accélérateurs et un catalyseur.
  22. Cuve selon la revendication 17,
    caractérisée en outre en ce que
    la silice cristalline comprend 40 % à 60 % en poids de particules d'une dimension allant de 6,35 à 3,17 mm (1/4 de pouce à 1/8 de pouce), 10 % à 25 % en poids de particules d'une dimension allant de 3,17 à 1,59 mm (1/8 de pouce à 1/16 de pouce) et 10 % à 15 % de sable fin de silice, ou poudre de silice comprenant 0,9 % à 5 % en poids de particules choisies dans le groupe constitué par des éclats de mica d'une dimension d'environ 0,39 mm (1/64 de pouce) et par des brins de fibre de verre coupés de 6,35 à 3,17 mm (1/4 de pouce à 1/8 de pouce).
  23. Procédé de fabrication de la cuve selon la revendication 1,
    caractérisé en ce que
    ledit procédé comprend les étapes consistant à appliquer sur la surface d'un moule une couche avant constituée d'un matériau choisi dans le groupe composé des résines d'esters de vinyle et des résines de polyester, à appliquer sur ladite couche avant un mat constitué de fibres inorganiques imprégné d'un matériau choisi dans le groupe composé de résines de polyester et de résines d'esters de vinyle, à mélanger une résine thermo-durcissable choisie dans le groupe composé de résines d'esters de vinyle et de résines de polyester et une charge consistant en un aggrégat de particules, et à verser de façon continue le mélange dans un moule inversé comportant ladite couche avant et ladite couche de renfort qui délimitent les parois formant le fond, les extrémités et les côtés et à permettre audit mélange moulé de durcir les surfaces de la cuve étant en contact avec les surfaces du moule de façon à mouler des surfaces intérieures lisses.
  24. Procédé selon la revendication 23,
    dans lequel ladite fibre inorganique est de la fibre de verre sous forme de mat.
  25. Procédé selon la revendication 23, dans lequel ledit mat est constitué de brins d'une longueur de 12,7 à 50,8 mm (1/2 pouce à 2 pouces).
  26. Procédé selon la revendication 14,
    dans lequel ladite couche avant a une épaisseur d'environ 0,25 à 0,50 mm (10 à 20 mils).
  27. Procédé selon la revendication 26,
    caractérisé en outre en ce que
    la couche de renfort comporte environ 20 % à 30 % en poids de fibres et environ 70 % à 80 % en poids de résine.
  28. Procédé selon la revendication 27,
    caractérisé en outre en ce que
    l'agrégat comprend un mélange de 80 % à 90 % en poids de particules qui ont une dimension de 6,2 à 0,79 mm (1/4 de pouce à 1/32 de pouce), 10 % à 15 % en poids de particules choisies dans le groupe consistant en sable fin de silice, ou poudre de silice et en 0,9 % à 5 % en poids de particules choisies dans le groupe consistant en des éclats de mica d'une dimension d'environ 0,39 mm (1/64 de pouce) et en des brins coupés de fibre de verre d'une dimension de 6,35 à 3,17 mm (1/4 de pouce à 1/8 de pouce).
  29. Procédé selon la revendication 27,
    caractérisé en outre en ce que
    la résine modifiée comprend 80 % à 90 % d'une résine choisie dans le groupe composé des résines d'esters de vinyle et des résines de polyester, et un complément constitué d'un diluant, d'inhibiteurs, d'accélérateurs et d'un catalyseur.
EP90120914A 1989-11-03 1990-10-31 Recipient pour électrolytes corrosifs Expired - Lifetime EP0431313B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US431526 1989-11-03
US07/431,526 US5037520A (en) 1988-10-04 1989-11-03 Container for corrosive material
US07/442,593 US5079050A (en) 1989-11-29 1989-11-29 Container for corrosive material
US442593 1989-11-29

Publications (2)

Publication Number Publication Date
EP0431313A1 EP0431313A1 (fr) 1991-06-12
EP0431313B1 true EP0431313B1 (fr) 1996-01-31

Family

ID=27029082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120914A Expired - Lifetime EP0431313B1 (fr) 1989-11-03 1990-10-31 Recipient pour électrolytes corrosifs

Country Status (11)

Country Link
EP (1) EP0431313B1 (fr)
AT (1) ATE133722T1 (fr)
AU (1) AU638502B2 (fr)
BR (1) BR9005568A (fr)
CA (1) CA2028991C (fr)
DE (1) DE69025145T2 (fr)
DK (1) DK0431313T3 (fr)
ES (1) ES2085308T3 (fr)
FI (1) FI93977C (fr)
GR (1) GR3019302T3 (fr)
MX (1) MX168152B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5756874A (en) * 1995-10-10 1998-05-26 Eosystems, Inc. Electrochemical cell for processing organic wastes
WO2001032962A1 (fr) * 1999-11-05 2001-05-10 Garbutt Peter John Cellule electrolytique
CL2008003237A1 (es) 2008-10-30 2009-10-09 Novel Composites Tech S A Conjunto modular de contenedores en paralelo para soluciones electroliticas, comprende paredes intermedias con un pasaje para alimentacion y distribucion protegida de electrolito, cuyas partes superiores, inferior y al menos un extremo son definidas por formaciones de borde que contiene los pasajes en su interior.
EP3294930B1 (fr) * 2015-05-13 2022-03-16 Pultrusion Technique Inc. Cuve d'électrolyse comprenant des éléments de renforcement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816070A (en) * 1954-09-23 1957-12-10 Union Carbide Corp Electrolytic cell tank construction
US3409536A (en) * 1966-06-03 1968-11-05 Barber Webb Co Electrolytic cell with cell liner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE549261A (fr) * 1956-07-04
US3682809A (en) 1970-02-24 1972-08-08 Kennecott Copper Corp Electrolytic cell constructed for high circulation and uniform flow of electrolyte
GB2134120B (en) * 1982-10-28 1986-06-04 Herman Clark Wadsworth Corrosion resistant materials and method of making same
US4885072A (en) 1988-10-04 1989-12-05 Harry John O Container for corrosive electrolyte

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2816070A (en) * 1954-09-23 1957-12-10 Union Carbide Corp Electrolytic cell tank construction
US3409536A (en) * 1966-06-03 1968-11-05 Barber Webb Co Electrolytic cell with cell liner

Also Published As

Publication number Publication date
CA2028991A1 (fr) 1991-05-04
DE69025145D1 (de) 1996-03-14
FI93977C (fi) 1995-06-26
GR3019302T3 (en) 1996-06-30
EP0431313A1 (fr) 1991-06-12
CA2028991C (fr) 1996-02-13
ATE133722T1 (de) 1996-02-15
DE69025145T2 (de) 1996-06-05
MX168152B (es) 1993-05-06
BR9005568A (pt) 1991-09-17
FI93977B (fi) 1995-03-15
DK0431313T3 (da) 1996-06-10
AU638502B2 (en) 1993-07-01
AU6569890A (en) 1991-05-09
ES2085308T3 (es) 1996-06-01
FI905442A0 (fi) 1990-11-02

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