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A CONCEPT TO CONTROL ACID MIST,ORGANIC REMOVAL, HEIGHT OF DEPOSITION

AND OTHER BENEFITS

FOR ELECTRO-WINNING CELLS

F. Penna C. Villaseca R. Villarroel

Tecnocomposites S.A.

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ORGANIC ENTRAINMENTS

THE PROBLEMOrganic entrainments are undesired events

It impregnates over cathodes, structures and equipments

Is flamable so increasing fire risk

Organic burn is present on cathodes thusimpairing the stripping

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ORGANIC ENTRAINMENTS

A SOLUTION FOR ACID MIST THAT TURNS INTO A PROBLEM

Organic adhere to plastic balls additional procedure for washing balls

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ORGANIC REMOVAL

CURRENTLY USED TECHNIQUES

Pumping fromsurface of cells

Scavenger cells

Manual removal Absorbent cloths

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ORGANIC REMOVAL

CURRENTLY USED TECHNIQUES

Spilling due to electrolyte overflow

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A gutter along the entire cell integrated to the frameof the LateralVex

Two gutters connected to a collector located at thecells overflow

A device that can be easily mounted into new or

existing cells Control of electrolyte level and/or heigth of copper

deposition

Cascade effect produced by the overflow at both sides Control of acid mist in the cell

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SUMMARY

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Transport Ducts

Stack

Centrifugal

Fan WetScrubber

Electrolytic Cell

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MAIN COMPOUNDS

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MAIN COMPOUNDS

Suction Plenum(LateralVex)

Multiple Covers

Lateral overflow gutter(LateralFlow)

Guide

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MAIN COMPOUNDS

Suction Plenum(LateralVex)

Lateral overflow gutter(LateralFlow)

Overflow collector

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Cathode

Anode

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MAIN COMPOUNDS

Guide

Flexible cover

Cover

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WORKING PRINCIPLE

Overflow through lateral gutter

Suction Plenum

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Once in lateralOnce in lateral guttersgutters thethe

organicorganic isis transferredtransferred toto

thethe sumpsump

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WORKING PRINCIPLE

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TEST IN EW PLANT

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TEST IN EW PLANT

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Non linear edge

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TEST IN EW PLANT

Cathodes harvested in a cellwithout our technology

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Cathodes harvested in a cellwith LateralFlow

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TEST IN EW PLANT

Clean linear edge

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SIERRA MIRANDA EW PLANT

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SIERRA MIRANDA EW PLANT

Overview

Top of cell view

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Do not require additional handling

during harvest

Clean cathodes

Less organic for removing

High quality and easy strip

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SIERRA MIRANDA EW PLANT

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Effectiveness to confine and to capture acid mist

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SIERRA MIRANDA EW PLANT

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Organic entrainments are evacuated by lateral gutters

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SIERRA MIRANDA EW PLANT

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Uniform overflow by short distance

Improve electrolyte distribution around the plates (*)

Homogeneous deposition throughout the length of thecell (*)

Organic entrainments and other floating impurities are

quickly removed

Better control of heigth of deposition

Acid mist is successfully controlled at the source

(*) In study

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CONCLUSIONS

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GRATITUDE

Minera Sierra Miranda SCM

www.tecnocomposites.cl