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Electrorefining Electrorefining and and Electrowinning Electrowinning Capping Capping Boards Boards Ficha Ficha Tecnica Tecnica / Data / Data Sheet Sheet

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Page 1: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

ElectrorefiningElectrorefining and and ElectrowinningElectrowinning CappingCapping BoardsBoards

Ficha Ficha TecnicaTecnica / Data / Data SheetSheet

Page 2: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

INTRODUCTIONINTRODUCTIONINTRODUCTIONINTRODUCTION

In the hydrometallurgical industry, it is of common practice to refine metal by electrolysis in electrolytic cells especially designed for this purpose. The metals that are refined are usually conventional metals like copper, zinc, nickel,cobalt or precious metals like silver, platinum 

or gold, and others.It is also of common practice to use metal plates as anodes or cathodes or both. These metal plates most often weigh several hundred 

pounds, have a given thickness and include the metal to be refined or used to carry the electric current. Once installed, the plates usually hang on lateral sidewalls of the electrolytic cells. In use, these heavy plates are immersed into the cells in parallel relationship and are 

used as anodes, cathodes or both, depending on the affinity and properties of the metal being refined.In order to precisely and properly position the electrodes, it is of common practice to place a member called a “capping board” onto the top surface of each lateral sidewall of the cells. These capping boards are used to position the plates with respect to each other. They are 

also used as electric insulators between adjacent cells and/or each electrode and/or the ground.j / / gIn practice, the capping boards are used not only as supports to position the electrodes, but also as supports to avoid damage to the 

masonry or concrete forming the lateral sidewalls of the cells during the insertion and removal of the heavy electrodes.As mentioned herein above, the insulating capping boards are used to hold the electrodes at very precise positions. They are also often used in combination with other components of the electrolytic apparatus, such as electrically conductive contact bars (Bus bars) whose purpose is to allow electrical connection between the ends of the anodes and cathodes located in the adjacent cells. Thus, the combined use of capping boards and contact bars has the particularity of allowing insulation and distribution of electric current at the same time.use of capping boards and contact bars has the particularity of allowing insulation and distribution of electric current at the same time. The capping boards may also be precisely arranged in relation to other components, depending on the specific electrolytic process or cell 

arrangement.The installation of capping boards also presents numerous difficulties, as both the capping boards and the electrical plates are often large, heavy and awkward to handle. In addition, the precision fit of the capping board with respect to the plate and cell dimensions requires 

certain manufacturing standards and implies certain limits on the form and construction of the capping board. 

Page 3: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

Capping BoardsCapping Boardspp gpp g

•• CustomCustom DesignsDesigns‐ Electrowinning‐ Electrorefining

•• AccurateAccurate PositioningPositioning‐ Excelent Dimensional Tolerances

•• High Grade High Grade MaterialsMaterials‐ High Compression StrenghtHigh Compression Strenght‐ High Electrical Resistance‐ High Chemical Resistance‐ High Temperature Resistance‐ High Temperature Resistance

Page 4: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

MechanicalMechanical Test Test 

Thermal Test

Dimensional Check

Impact Test

Dimensional Check

Page 5: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

ChemicalChemical TestTest

Resistencia Resistencia QuimicaQuimica‐ %Weight H2SO4:  15 ‐ 90%‐ Temperature :  20 ‐ 70 ºC‐ Time: 240 hrs.

Page 6: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

ThermalThermal TestTest

Temperature (300ºC)

Thermal TestTemperature Test : 300ºCTemperature Test : 300 CTest Duration : 24 hrs.

Page 7: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

Test Test CappingCapping BoardsBoards

Thermal Test Impact Test

Page 8: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

Test Parameters

ThermoThermo –– ChemicalChemical CappingCapping BoardsBoards TestTest

Test Parameters‐Weight Concentration H2SO4: 90%‐ Temperature :  70 ºC‐ Time              : 200 hrs.

Standard Material

Cell Material PolimericConcrete

Exma High Grade Material

Page 9: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

Test Parameters- Weight Concentration H2SO4: 90%- Temperature : 70 ºC- Time : 200 hrs.Time : 200 hrs.

Page 10: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

Test Parameters- Weight Concentration H2SO4: 90%- Temperature : 20 ºC- Time : 1000 hrs.

XoXo : : ExmaExma High Grade MaterialHigh Grade Material

Page 11: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

Rangos Usos MaterialRangos Usos Material

High Grade Material High Grade Material CappingCapping BoardsBoards%

Weight 20ºC 30ºC 50ºC 70ºCH2SO4

20 C 30 C 50 C 70 C

5 o.k o.k o.k o.k15 o.k o.k o.k o.k30 o.k o.k o.k o.k50 o.k o.k o.k o.k

75 o.k o.k o.k o.k

- Low SurfaceDiscoloration- Mass loss0 02%

90 o.k o.k o.kMass loss0.02%

- Good ImpactResistance- ThermalResistance 260ºC

Page 12: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

Capping Boards ElectrowinningCapping Boards ElectrowinningSistema Barras Alta Densidad Corriente Ánodo EqualizadoSistema Barras Alta Densidad Corriente Ánodo EqualizadoSistema Barras Alta Densidad Corriente Ánodo EqualizadoSistema Barras Alta Densidad Corriente Ánodo Equalizado

Page 13: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

CappingCapping BoardsBoards ElectrowinningElectrowinning CheckCheck

Page 14: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

CappingCapping BoardsBoards ElectrowinningElectrowinningSistema Barras Corriente Sistema Barras Corriente AnodoAnodo EqualizadoEqualizado

Page 15: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

CappingCapping BoardsBoards ElectrowinningElectrowinningSistema Barras Corriente Sistema Barras Corriente AnodoAnodo ‐‐ CatodoCatodo EqualizadoEqualizado

Page 16: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

CappingCapping BoardsBoards ElectrowinningElectrowinningSistema Barras Corriente Sistema Barras Corriente AnodoAnodo EqualizadoEqualizado

Page 17: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

CappingCapping BoardsBoards ElectrowinningElectrowinning Barra Barra SpoolSpoolpp

Page 18: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

CappingCapping BoardsBoards ElectrorefinacionElectrorefinacion

Page 19: Ficha TecnicaTecnica / / Data Sheet - Exma Ltdaexma.cl/pdf/prod/CAPPING_BOARDS-data.pdfheavy and awkward to handle. In addition, the precision fit of the capping board with respect

CappingCapping BoardsBoards ElectrowinningElectrowinning Alto Grado Alto Grado