M40000-4100-110-CAL-0002

CALCULATION

Nº M40000-4100-110-CAL-0002For

REAGENTS SYSTEM

Prepared by

CEJV – Casale EPCM Joint Venture AMEC - Fluor

Approved by

Discipline Leader: Ian Orford (IO)Functional Leader: Pierre Lacombe (PL)Project Engineer: René Burgos (RB)Area Manager/Process Manager: Roberto Aburto / Pierre L (RA/PL)Engineering Manager: Carlos Narváez (CNG)Project Manager EP: Paul McRae (PM)Client: Ricardo Mena Patri (RMP)

Rev. Date Purpose of Revision Prepared Checked ApprovedA 18.04.2011 Internal Coordination FO IO PL

Comments:

document.doc

COMPAÑIA MINERA CASALE

PROJECT Nº M40000

CERRO CASALE PROJECT

EPCM

TABLE OF CONTENTS

1.0 INTRODUCTION 3

2.0 SCOPE3

3.0 REFERENCES 4

4.0 CALCULATION BASIS 4

5.0 DEVELOPMENT 5

6.0 CONCLUSIONS AND RECOMMENDATIONS 26

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1.0 INTRODUCTION

El presente documento corresponde a la memoria de cálculo del sistema de reactivos del proyecto. La ruta de procesos está definida para dos plantas:

Planta Concentradora

Planta HL / ADR / SART

Los reactivos son clasificados de acuerdo a su uso en ambas plantas.

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2.0 SCOPE

El alcance del documento incluye la descripción de cada reactivo (tipo, función, suministro, concentración, dosificación y consumo), el dimensionamiento de los estanques de recepción, almacenamiento, preparación y/o distribución, y el respectivo balance de masa.

Los reactivos descritos en el presente documento, son los siguientes:

Planta Concentradora

Colector Primario : Potassium Amyl Xanthate (PAX)

Colector Secundario : Aerofloat 3477 (A3477)

Espumante : Methyl Isobuthyl Carbinol (MIBC)

Celulosa : Carboxymethyl Cellulose (CMC)

Antiescalante : Antiscalant Polycarboxylate

Floculante : Magnafloc 351 (no iónico)

Lechada de Cal : Hidróxido de Calcio

Cianuro : Solución de Cianuro de Sodio

Carbón Activado : Carbón de Coco

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Planta HL / ADR / SART

Cianuro : Solución de Cianuro de Sodio

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3.0 REFERENCES

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4.0 CALCULATION BASIS

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5.0 DEVELOPMENT

5.1 General

The reagents system applied to Concentrator and Gold/SART plants includes a complete characterization of each one, equipment sizing (tanks) and the corresponding mass balance.

The reagents have been classified according their characteristics and functions behind process plants. The classification is defined as follow:

Reagents for Grinding & Flotationo Primary collectoro Secondary collectoro Frothero Celluloseo Antiscalant

Reagents for pH Modificationo Lime (as milk)o Sodium Hydroxide (as solution)o Sulphuric Acid

Reagents for Thickeningo Flocculant to Concentratoro Flocculant to Port Siteo Flocculant to SART Plant

Reagents for Gold & SART Plantso Activated Carbono Sodium Cyanide (as solution)o Hydrochloric Acido Sodium Hydrosulfide (as solution)o Sodium Metabisulphiteo Sulphur Dioxide

Reagents for Smeltingo Calcium Carbonate (soda ash)o Sodium Borate (borax)o Fluorsparo Silica

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5.2 Reagents for Grinding & Flotation

5.2.1 Primary Collector

Properties

PARAMETER VALUE UNITName Potassium Amyl Xanthate -Generic Name PAX -Molecular Formula C6H11KOS2 -Molecular Weight 202.4 g/molRole Primary Collector -Supply Type Solid -Delivery Form Bulk Bag -Bag Capacity 1 tSG Solids 1.35 t/m3

Strength Solution 15 %SG Solution 1.04 t/m3

pH 9.5 – 11.5 -Viscosity 30 - 500 cP

Dosage and Consumption

PARAMETER VALUE UNITReagent ApplicationConsumption Point # 1 Rougher Flotation – Line # 1 -Consumption Point # 2 Rougher Flotation – Line # 2 -Consumption Point # 3 Rougher Flotation – Line # 3 -Consumption Point # 4 Rougher Flotation – Line # 4 -Consumption Point # 5 Rougher Flotation – Line # 5 -Consumption Point # 6 Rougher Flotation – Line # 6 -

Flowrates of SolidsFlowrate to Flotation per Line (Nominal) 1,170 t/hFlowrate to Flotation per Line (Design) 1,287 t/h

Reagent DosagePAX Dosage (Nominal) 30 g/tReagent Design Factor 1.2 -PAX Dosage (Design) 36 g/t

Reagent ConsumptionPAX Consumption (Nominal) 0.21 t/hPAX Consumption (Design) 0.28 t/hPAX Daily Consumption (Nominal) 4.80 t/dPAX Daily Consumption (Design) 6.34 t/d

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Tank Sizing

MIXING TANK PARAMETERS VALUE UNITCapacitiesTank 3.0 bag/batchSupply Solids 1.0 t/bagTotal per Tank 3.0 t/batch

Reagent PreparationMixed Reagent Quantity per Batch 3.0 tStrength Solution 15 %Solution (15%) per Batch 20.0 tWater in Solution (15%) per Batch 17.0 t (m3)SG Solids 1.35 t/m3

Solids Volume (per Batch) 2.2 m3

Required Volume per Batch 19.2 m3

SizingMaximum Required Volume (per Batch) 19.2 m3

Recommended Tank Volume (Design) 20.0 m3

Diameter of Tank (Design) 2.5 mHeight of Tank (Design) 4.5 m

HOLDING TANK PARAMETERS VALUE UNITDaily Consumption (Design Values)Solids Flowrate 6.3 t/dSolution Flowrate 42.2 t/dWater Flowrate 35.9 t/dSolution Volumetric Flowrate 40.6 m3/d

Operation TimeOperation Time (for Design Consumption) 11.4 hOperation Time (for Holding Tank) 18.0 h/d

SizingRequired Volume for Holding Tank 30.5 m3

Recommended Tank Volume (Design) 30.0 m3


DISTRIBUTION TANK PARAMETERS VALUE UNITConsumption (Distribution and Recirculation)Solution Volumetric Flowrate (Design) 10.7 m3/h

TimeTransfer from Holding to Distribution Tank 30 (0.5) min (h)

SizingRequired Volume (Design) 5.3 m3

Recommended Volume (Design) 6.0 m3

Diameter of Tank (Design) 2.0 m

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Height of Tank (Design) 2.0 m

Mass Balance

5.2.2 Secondary Collector

Properties

PARAMETER VALUE UNITName Sodium Di-Isobutyl Dithiophosphate -Generic Name A 3477 -Molecular Formula C8H18NaO2PS2 -Molecular Weight 264.3 g/molRole Secondary Collector -Supply Type Liquid -Delivery Form (Tanker Truck) 20 m3

SG Solution 1.105 t/m3

Strength Solution 100 %pH 11 - 13 -Viscosity 22 cP


PARAMETER VALUE UNITReagent ApplicationConsumption Point # 1 Grinding – Line # 1 -Consumption Point # 2 Grinding – Line # 2 -Consumption Point # 3 Grinding – Line # 3 -Consumption Point # 4 Grinding – Line # 4 -Consumption Point # 5 Grinding – Line # 5 -Consumption Point # 6 Grinding – Line # 6 -

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Consumption Point # 7 Rougher Flotation – Line # 1 -Consumption Point # 8 Rougher Flotation – Line # 2 -Consumption Point # 9 Rougher Flotation – Line # 3 -Consumption Point # 10 Rougher Flotation – Line # 4 -Consumption Point # 11 Rougher Flotation – Line # 5 -Consumption Point # 12 Rougher Flotation – Line # 6 -Consumption Point # 13 Regrinding Cyclone Feed -Consumption Point # 14 1st Cleaner Flotation -Consumption Point # 15 1st Cleaner Scav. Flotation -Consumption Point # 16 2nd Cleaner Flotation -Consumption Point # 17 3rd Cleaner Flotation -

Flowrate to Consumption PointGrinding Lines (1 to 6) (Nominal / Design) – per line 1,170 / 1,287 t/hRougher Lines (1 to 6) (Nominal / Design) – per line 1,170 / 1,287 t/hPlant Feed (Nominal / Design) 7,018 / 7,719 t/h

Reagent DosageGrinding Lines (Nominal / Design) 24.0 / 28.8 g/t feed to row

Rougher Lines (Nominal / Design) 6.00 / 7.20 g/t feed to row

Regrinding Cyclone Feed (Nominal / Design) 1.00 / 1.20 g/t plant feed

1st Cleaner Feed (Nominal / Design) 0.60 / 0.72 g/t plant feed

1st Cleaner Scavenger Feed (Nominal / Design) 0.80 / 0.96 g/t plant feed

2nd Cleaner Feed (Nominal / Design) 0.40 / 0.48 g/t plant feed

3rd Cleaner Feed (Nominal / Design) 0.20 / 0.24 g/t plant feed

A3477 Consumption (Nominal / Design) 0.23 / 0.31 t/h0.21 / 0.28 m3/h

A3477 Daily Consumption (Nominal / Design) 5.28 / 6.97 t/d4.78 / 6.31 m3/d

Tank Sizing

HOLDING TANK PARAMETERS VALUE UNITCapacitiesTank Nominal Capacity 1.3 trucksTruck Nominal Capacity 20.0 m3/truckTruck Nominal Capacity 22.1 t/truckTruck Design Capacity 26.0 m3/truckTruck Design Capacity 28.7 t/truckTime to Empty the Truck Volume 1.5 h

ConsumptionFlowrate of Solution from Truck 14.7 t/hVolumetric Flowrate of Solution from Truck 13.3 m3/h


Recommended Volume 26.0 m3


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DISTRIBUTION TANK PARAMETERS Value UnitConsumption (Distribution and Recirculation)Solution Flowrate (Nominal / Design) 1.39 / 1.83 t/h

1.26 / 1.66 m3/h

SizingTime Required to Distribute the Solution 1.0 hRequired Volume 1.66 m3



Mass Balance

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5.2.3 Frother

Properties

PARAMETER VALUE UNITName Methyl Isobutyl Carbinol -Generic Name MIBC -Molecular Formula C6H14O -Molecular Weight 102.2 g/molRole Frother -Supply Type Liquid -Delivery Form (Tanker Truck) 20 m3


Strength Solution 100 %pH 7 -Viscosity 5 cP


PARAMETER VALUE UNITReagent ApplicationConsumption Points 01 & 02 Rougher Feed – Line 1 – Cells 1 & 4 -Consumption Points 03 & 04 Rougher Feed – Line 2 – Cells 1 & 4 -Consumption Points 05 & 06 Rougher Feed – Line 3 – Cells 1 & 4 -Consumption Points 07 & 08 Rougher Feed – Line 4 – Cells 1 & 4 -Consumption Points 09 & 10 Rougher Feed – Line 5 – Cells 1 & 4 -Consumption Points 11 & 12 Rougher Feed – Line 6 – Cells 1 & 4 -Consumption Point 13 1st Cleaner Flotation -Consumption Point 14 1st Cleaner Scavenger Flotation -Consumption Point 15 2nd Cleaner Flotation -Consumption Point 16 3rd Cleaner Flotation -Flowrate to Consumption PointRougher Lines 1 to 6 (Cell 1) (Nominal / Design) 1,170 / 1,287 t/hRougher Lines 1 to 6 (Cell 4) (Nominal / Design) 1,170 / 1,287 t/h1st Cleaner Line (Nominal / Design) 1,116 / 1,282 t/h1st Cleaner Scavenger Line (Nominal / Design) 943 / 1,013 t/h2nd Cleaner Line (Nominal / Design) 193 / 300 t/h3rd Cleaner Line (Nominal / Design) 73 / 114 t/hReagent DosageRougher Lines 1 to 6 (Cell 1) (Nominal / Design) 5.80 / 6.96 g/tRougher Lines 1 to 6 (Cell 4) (Nominal / Design) 3.00 / 3.60 g/t1st Cleaner Line (Nominal / Design) 0.50 / 0.60 g/t1st Cleaner Scavenger Line (Nominal / Design) 0.45 / 0.54 g/t2nd Cleaner Line (Nominal / Design) 0.20 / 0.24 g/t3rd Cleaner Line (Nominal / Design) 0.10 / 0.12 g/tMIBC Consumption (Nominal / Design) 0.06 / 0.08 t/h

0.08 / 0.10 m3/hMIBC Daily Consumption (Nominal / Design) 1.51 / 1.99 t/d

1.87 / 2.47 m3/d

Tank Sizing

HOLDING TANK PARAMETERS VALUE UNITCapacitiesNominal Capacity 1.3 trucksNominal Truck Capacity 20.0 m3/truckDesign Capacity 26.0 m3/truck

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TimesTime to Empty the Truck Volume 1.5 hConsumptionFlowrate of Solution from Truck 10.8 t/hVolumetric Flowrate of Solution from Truck 13.3 m3/hSizingRequired Volume (Design) 26.0 m3



DISTRIBUTION TANK PARAMETERS Value UnitConsumption per DistributionFlowrate of Solution (Nominal / Design) 0.06 / 0.08 t/h

0.08 / 0.10 m3/hConsumption per RecirculationFlowrate of Solution (Nominal / Design) 0.31 / 0.41 t/h

0.39 / 0.51 m3/hTotal ConsumptionFlowrate of Solution (Nominal / Design) 0.38 / 0.50 t/h

0.47 / 0.62 m3/hSizingTime Required to Distribute the Solution 0.5 hRequired Volume 0.3 m3



Mass Balance

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5.2.4 Cellulose

Properties

PARAMETER VALUE UNITName Sodium Carboxymethyl Cellulose -Generic Name CMC -Molecular Formula Polymer C28H30Na8O27 -Molecular Weight 982.5 g/molRole Clay Depressor -Supply Type Solid -Delivery Form (Bulk Bag) 0.7 tSG Solids 1.59 t/m3


Strength Solution 2 %pH 6 - 8 -Viscosity 500 – 2,500 cP


PARAMETER VALUE UNITReagent ApplicationConsumption Point # 1 Regrinding Cyclone Feed Box -Consumption Point # 2 2nd Cleaner Concentrate Box -Consumption Point # 3 3rd Cleaner Concentrate Box -Flowrate to Consumption PointRegrinding Cyclone Feed Box (Nominal / Design) 2,490 / 3,286 t/h2nd Cleaner Concentrate (Nominal / Design) 193 / 300 t/h3rd Cleaner Concentrate (Nominal / Design) 73 / 114 t/h

Reagent DosageRegrinding Cyclone Feed Box (Nominal / Design) 100 / 120 g/t2nd Cleaner Concentrate Box (Nominal / Design) 35 / 42 g/t3rd Cleaner Concentrate Box (Nominal / Design) 15 / 18 g/tCMC Consumption (Nominal / Design) 12.84 / 20.45 t/h

12.75 / 20.30 m3/hCMC Daily Consumption (Nominal / Design) 308 / 491 t/d

306 / 487 m3/d

Tank Sizing

HOPPER PARAMETERS VALUE UNITCapacitiesNominal Capacity 2 bag/batchSupply Solids 0.7 t/bagTotal Hopper 1.4 t/batchBulk Density (Solids) 0.64 t/m3

Volume of Solids to Mix 2.2 m3



Diameter of Hopper (Design) 1.5 mHeight of Hopper (Design) 2.0 m

MIXING TANK PARAMETERS VALUE UNITTimes

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Time to Filling 1/3 hTime of Mixing in Reactor 2/3 hTime of Transfer from Mix to Distribution Tank 0.5 hTotal Time per Batch 1.5 hConsumptionFlowrate of Solids per Batch 1.40 t/batchFlowrate of Solids per Day 3.78 t/dN° of Batch Required 2.7 batch/dN° of Batch (Design) 3.0 batch/d



Diameter of Hopper (Design) 1.5 mHeight of Hopper (Design) 2.0 m

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5.3 Concentrator

5.3.1 General Aspects

The reagents system of Concentrator includes the application of following agents:

Primary Collector (Potassium Amyl Xanthate – PAX) Secondary Collector (Aero 3477) Frother (Methyl Isobutyl Carbinol – MIBC) Cellulose (Carboxymethyl Cellulose – CMC) Flocculant (Magnafloc 351 and 336) Antiscalant Milk of Lime (Calcium Hydroxide)

For the Gold Plant, the reagents considered are:

Sodium Cyanide (NaCN solution) Sodium Hydroxide (NaOH solution) Hydrochloric Acid (HCl solution) Activated Carbon

For the SART Plant, the reagents considered are:

Sodium Hydrosulfide (NaHS solution) Flocculant (Magnafloc 156)

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Sulphuric Acid (H2SO4 solution) Sodium Metabisulphite (Na2S2O5 solution) Sulphur (SO2 gas)

5.3.2 Primary Collector

5.3.2.1. Characterization

PARAMETER VALUE UNITType Potassium Amyl Xanthate -

Formula / Generic name PAX -

Role Primary collector -

Supply type Solid -

Delivery form 1 ton bulk bag -

SG (solids) 1.35 -

SG (solution) 1.04 -

Water solubility Complete -

pH 9.5 – 11.5 -

Viscosity (25 °C) cP

N° Distribution points 6 -

Distribution Points

Rougher Flotation Feed Line # 1 -






Mass flow of solids to flotation (nominal) 1,170 t/h

Mass flow of solids to flotation (design) 1,287 t/h

Dosage (nominal) 30 g PAX / t ore

Reagent design factor 1.20 -

Dosage (design) 36 g PAX / t ore

Mixing solution strength 15 %

Consumption (nominal) 5.05 t PAX / d

Design peak consumption 6.67 t PAX / d

5.3.2.2. Mixing, Holding and Distribution Tanks Sizing

MIXING (PREPARATION) TANK Value UnitCapacitiesTank (bag/batch) 3.0 bag/batch

Supply solids 1.0 t/bag

Total tank (solids/batch) 3.0 t/batch

TimesFilling of mixing tank 20 (0.33) min (h)

Mixing reactor 20 (0.33) min (h)

Transference to holding tank 20 (0.33) min (h)

Total per batch 60 (1.00) min (h)

ConsumptionMass flow of solids per batch 3.0 t/batch

Mass flow of solids required 6.7 t/d

N° of batch required 2.2 batch/d

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N° of batch (design) 3.0 batch/d

Batch # 1 3.0 t/h

Batch # 2 2.0 t/h

Batch # 3 2.0 t/h

Mass flow of solids for 3 batch 7.0 t/h

Mass flow of solution for 3 batch 46.7 t/h

Mass flow of water for 3 batch 39.7 t/h

Volumetric flow of solution (3 batch) 44.9 m3/h

Consumption per Batch # 1Mass flow of solids 3.0 t/h

Mass flow of solution 20.0 t/h

Mass flow of water 17.0 t/h

Volumetric flow of solution 19.2 m3/h

Consumption per Batch # 2 and # 3Mass flow of solids 2.0 t/h




SizingRequired volume per batch (max) 19.2 m3

Recommended volume (design) 20.0 m3

Diameter of tank (design) 3.0 m

Height of tank (design) 3.0 m

HOLDING TANK Value UnitConsumption from Mixing TankMass flow of solids 3.0 t/h




Consumption from RecirculationMass flow of solids 1.4 t/h




Total Consumption in Holding TankMass flow of solids 4.4 t/h




SizingRequired volume (per batch) 28.1 m3

Recommended volume 30.0 m3



DISTRIBUTION TANKConsumption per distributionTotal mass flow of solids 0.3 t/h

Total mass flow of solution 1.9 t/h

Total volumetric flow of solution 1.8 m3/h

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Consumption per recirculationTotal mass flow of solids 1.4 t/h



Total ConsumptionTotal mass flow of solids 1.7 t/h



SizingRequired time to empty distribution tank 15 (0.25) min (h)

Required volume 2.7 m3




5.3.2.3. Mass Balance

Parameters Value UnitFeed to rougher lines # 1 to 6 (nominal) 1,170 t/h

Feed to rougher lines # 1 to 6 (design) 1,287 t/h

Primary collector dosage (nominal) 30 t PAX / t ore

Primary collector dosage (design) 36 t PAX / t ore

Recirculation 500 %

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5.3.3 Secondary Collector


PARAMETER VALUE UNITType Aero 3477 -

Generic name (Formula) A 3477 -

Role Secondary collector -

Supply type Liquid -

Delivery form Tank truck of 20 m3 -



pH 11 - 13 -

Viscosity (25 °C) 22 cP


Distribution Points

Grinding Line # 1 -

Grinding Line # 2 -

Grinding Line # 3 -

Grinding Line # 4 -

Grinding Line # 5 -

Grinding Line # 6 -

Rougher Flotation Line # 1 -






Regrinding Cyclone Feed Box -

1st Cleaner Flotation -

1st Cleaner Scavenger Flotation -

2nd Cleaner Flotation -

3rd Cleaner Flotation -

ConsumptionsMixing solution strength 100 %

Solution (nominal) 5.15 t A3477 / d

Solution (nominal) 4.66 m3 A3477 / d

Solution (design) 6.81 t A3477 / d

Solution (design) 6.17 m3 A3477 / d

5.3.3.2. Holding and Distribution Tanks Sizing

HOLDING TANK Value UnitCapacitiesNominal capacity 1.3 trucks

Truck nominal capacity 20.0 m3

Design capacity 26.0 m3

TimesTime to empty the truck volume 45 (0.75) min (h)

ConsumptionMass flow of solution from truck 29.5 t/h

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Volumetric flow of solution from truck 26.7 m3/h

SizingRequired volume (design) 26.7 m3




DISTRIBUTION TANKConsumption per distributionTotal mass flow of solution (design) 0.284 t/h

Total volumetric flow of solution (design) 0.257 m3/h

Consumption per recirculationTotal mass flow of solution (design) 1.420 t/h


Total ConsumptionTotal mass flow of solution (design) 1.703 t/h








Associated Flows Nominal Design UnitSolids to grinding lines # 1 to 6 1170 1287 t/h

Solids to rougher flotation lines # 1 to 6 1170 1287 t/h

Solids to regrinding cyclones box 2490 3286 t/h

Solids to 1st cleaner flotation 1116 1282 t/h

Solids to 1st cleaner-scavenger flotation 943 1013 t/h

Solids to 2nd cleaner flotation 193 300 t/h

Solids to 3rd cleaner flotation 73 114 t/h

Associated Dosages Nominal Design UnitSecondary collector to grinding 24.0 28.8 g A3477 / t

Secondary collector to rougher flotation 6.0 7.2 g A3477 / t

Secondary collector to regrinding 1.0 1.2 g A3477 / t

Secondary collector to 1st cleaner 0.6 0.7 g A3477 / t

Secondary collector to 1st cleaner scav. 0.8 1.0 g A3477 / t

Secondary collector to 2nd cleaner 0.4 0.5 g A3477 / t

Secondary collector to 3rd cleaner 0.2 0.2 g A3477 / t

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5.3.4 Frother


PARAMETER VALUE UNITType Methyl Isobutyl Carbinol -

Generic name (Formula) MIBC -

Role Frother -

Supply type Liquid -

Delivery form Tanker truck of 20 m3 -


Water solubility 1.82 g/l

pH 7 -

Viscosity (25 °C) 5 cP

N° Distribution points 16 -Distribution Points Rougher Flotation Line # 1 – Cell # 1 -

Rougher Flotation Line # 2 – Cell # 1 -








Rougher Flotation Line # 4 – Cell # 4 -Rougher Flotation Line # 5 – Cell # 4 -

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1st Cleaner Flotation -

1st Cleaner Scavenger Flotation -

2nd Cleaner Flotation -

3rd Cleaner Flotation -


Solution (nominal) 1.507 t MIBC / d

Solution (nominal) 1.869 m3 MIBC / d

Solution (design) 1.990 t MIBC / d

Solution (design) 2.469 m3 MIBC / d

5.3.4.2. Holding and Distribution Tanks Sizing

HOLDING TANK Value UnitCapacitiesNominal capacity 1.3 trucks

Truck nominal capacity 20.0 m3

Design capacity 26.0 m3

SG solution 0.806 t/m3

Design capacity (weight) 21.0 t

TimesTime to empty the tank truck volume 45 (0.75) min (h)

ConsumptionMass flow of solution from truck 27.9 t/h

Volumetric flow of solution from truck 26.7 m3/h

SizingRequired volume (design) 26.7 m3

Recommended volume 30 m3



DISTRIBUTION TANKConsumption per distributionTotal mass flow of solution (design) 0.083 t/h


Consumption per recirculationTotal mass flow of solution (design) 0.415 t/h


Total ConsumptionTotal mass flow of solution (design) 0.498 t/h







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Associated Flows Nominal Design UnitSolids to grinding lines # 1 to 6 1170 1287 t/h

Solids to rougher flotation lines # 1 to 6 1170 1287 t/h

Solids to 1st cleaner flotation 1116 1282 t/h

Solids to 1st cleaner-scavenger flotation 943 1013 t/h

Solids to 2nd cleaner flotation 193 300 t/h

Solids to 3rd cleaner flotation 73 114 t/h

Associated Dosages Nominal Design UnitFrother to rougher lines 1-6 – Cell # 1 5.80 6.96 g MIBC / t

Frother to rougher lines 1-6 – Cell # 4 3.00 3.60 g MIBC / t

Frother to 1st cleaner flotation 0.50 0.60 g MIBC / t

Frother to 1st cleaner scavenger flotation 0.45 0.54 g MIBC / t

Frother to 2nd cleaner flotation 0.20 0.24 g MIBC / t

Frother to 3rd cleaner flotation 0.10 0.12 g MIBC / t

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5.3.5 Cellulose


PARAMETER VALUE UNITType Sodium Carboxymethyl Cellulose -

Generic name (Formula) CMC -

Role Clay depression -

Supply type Solid -

Delivery form 700 kg bulk bag -

SG (solids) 1.59



pH 11 -

Viscosity (25 °C) 1,500 – 2,000 cP


Distribution Points

Regrinding Cyclone Feed Box -

1st Cleaner Concentrate Box -

2nd Cleaner Concentrate Box -


Solution (nominal) 143.4 t CMC / d

Solution (nominal) 142.3 m3 CMC / d

Solution (design) 189.2 t CMC / d

Solution (design) 187.8 m3 CMC / d

5.3.5.2. Hopper, Mixing and Distribution Tanks Sizing

DRY CELLULOSE HOPPER Value UnitCapacitiesTank (bag/batch) 2.0 bag/batch

Supply solids 0.7 t/bag

Total tank (solids/batch) 1.4 t/batch

Bulk density (solids) 0.64 t/m3

Volume of solids to mixing 2.2 m3

SizingRequired volume of hopper 2.2 m3

Recommended volume of hopper 3.0 m3

Diameter of hopper 1.5 m

Height of hopper 2.0 m

MIXING TANKTimesFilling of mixing tank 20 (0.33) min (h)

Mixing in reactor 40 (0.67) min (h)

Transference to distribution tank 30 (0.50) min (h)

Total per batch 90 (1.50) min (h)

ConsumptionMass flow of solids per batch 1.40 t/batch

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Mass flow of solids required 3.78 t/d

N° of batch required 2.7 batch/d

N° of batch (design) 3.0 batch/d

Batch # 1 0.93 t/h

Batch # 2 0.93 t/h

Batch # 3 0.93 t/h

Mass flow of solids for 3 batch 2.80 t/h

Mass flow of solution for 3 batch 140.0 t/h

Mass flow of water for 3 batch 137.2 t/h

Volumetric flow of solution (3 batch) 139.0 m3/h

Consumption for Batch # 1, 2 and 3Mass flow of solids 0.93 t/h




SizingRequired volume per batch (max) 46.3 m3

Recommended volume (design) 50.0 m3



DISTRIBUTION TANK Value UnitTotal ConsumptionMass flow of solids 0.158 t/h




TimeTransfer from mixing to distribution tank 30 (0.5) min (h)

SizingRequired volume 15.7 m3




Associated Flows Nominal Design UnitTotal solids flow to rougher concentrate 796 876 t/h

Associated Dosages Nominal Design UnitCMC to regrinding cyclone feed box 100 120 g CMC / t rou.con

CMC to 1st cleaner concentrate box 35 42 g CMC / t rou.con

CMC to 2nd cleaner concentrate box 15 18 g CMC / t rou.con

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6.0 CONCLUSIONS AND RECOMMENDATIONS

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M40000-4100-110-CAL-0002_RA of 26

M40000-4100-110-CAL-0002

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