9:00am

ICSOBA Director's Meeting 9:00am - 3:30pm, Oct 28 Sala Eineida de Moraes

3:30pm

Conference registrations 3:30pm - 7:00pm, Oct 28 Foyer

7:00pm

Opening Cocktail Sponsored by Hatch 7:00pm - 10:00pm, Oct 28 Foyer

7:00am

Conference registrations 7:00am - 8:00am, Oct 29 Foyer

8:00am

Opening remarks 8:00am - 8:30am, Oct 29

8:30am

Keynote 8:30am - 10:00am, Oct 29 Sala Mario de Andrade A+B+C+D

Keynote

Preliminary AgendaSun, Oct 28, 2018

Mon, Oct 29, 2018

KN01 - Aspects to Consider in Alumina Refining Design 8:30am - 9:00am, Oct 29 Sala Mario de Andrade A+B+C+D

KN02 - Strategic Route for the Aluminum Chain in Brazil 9:00am - 9:30am, Oct 29 Sala Mario de Andrade A+B+C+D

KN03 - Operational Excellence Through Lean Management 9:30am - 10:00am, Oct 29 Sala Mario de Andrade A+B+C+D

3 Subsessions

9:00am

Exhibition 9:00am - 5:00pm, Oct 29 Foyer

Exhibition

10:00am

Coffee sponsored by Outotec 10:00am - 10:30am, Oct 29 Foyer

10:30am

KN04 - The Current Situation and Prospect of Chinese Aluminum Market 10:30am - 11:00am, Oct 29 Sala Mario de Andrade A+B+C+D

KN05 - Aluminium: Current Drivers and Future Outlook 11:00am - 11:30am, Oct 29

Keynote 10:30am - 12:30pm, Oct 29 Sala Mario de Andrade A+B+C+D

Keynote

4 Subsessions

Sala Mario de Andrade A+B+C+D

KN06 - Bauxite, Alumina and Aluminium Market Overview and CostsAnalysis 11:30am - 12:00pm, Oct 29 Sala Mario de Andrade A+B+C+D

KN07 - Environmental Aspects of RUSAL’s Sustainable Development Program 12:00pm - 12:30pm, Oct 29 Sala Mario de Andrade A+B+C+D

12:30pm

Group photo 12:30pm - 1:00pm, Oct 29

1:00pm

Lunch sponsored by Solvay 1:00pm - 2:00pm, Oct 29

2:00pm

AL01 - A Machine Learning Approach to Early Detection of Incorrect AnodePositioning in an Aluminum Electrolysis Cell 2:00pm - 2:30pm, Oct 29

AL02 - Adaptive Fuzzy Controller to Regulate Anode Covering Material Recipe 2:30pm - 3:00pm, Oct 29

AL03 - Application of AMBS Principles and Tools to Increase Productivity ofAnode Covering Material Plants 3:00pm - 3:30pm, Oct 29

Joint Carbon - Aluminium Sessions 2:00pm - 4:30pm, Oct 29

Joint Carbon - AluminiumSessions

5 Subsessions

AL04 - Development of a Clean Sealing Paste with Improved ElectricalProperties 3:30pm - 4:00pm, Oct 29

AL05 - Electromechanical Characterization of the Ramming Paste and theAging Effect on its Performance. 4:00pm - 4:30pm, Oct 29

The Barro Alto bauxite mine: a new and whole-exploitable deposit in theGoias State, Central Brazil 2:00pm - 2:30pm, Oct 29

New discover of bauxite in Serra da Prata, center of Roraima State, extremeNorth of Brazil 2:30pm - 3:00pm, Oct 29

Mine to Refinery Integrated Model for Reserve Definition 3:00pm - 3:30pm, Oct 29

Status of Bauxite and Laterite Resources in Madhya Pradesh: A Review 3:30pm - 4:00pm, Oct 29

An introduction to Bel Air Bauxite 4:00pm - 4:30pm, Oct 29

Bauxite Reserves - Brasil, Non Brasil 2:00pm - 4:30pm, Oct 29

Bauxite

5 Subsessions

4:30pm

Coffee sponsored by Outotec 4:30pm - 5:00pm, Oct 29 Foyer

Corporate Members Council (by invitation only) 4:30pm - 6:00pm, Oct 29

8:00pm

Gala Dinner Sponsored by Hydro 8:00pm - 11:00pm, Oct 29 Sala Mario de Andrade A+B+C+D

8:00am

AL06 - Amperage Increase from 340 kA to 425 kA and Beyond in EGA DX CellTechnology 8:00am - 8:30am, Oct 30 Sala Mario de Andrade D

AL07 - Preheat and Start-up Practice of SAMI SY 300 kA Prebake Pots at ETIAluminium 8:30am - 9:00am, Oct 30 Sala Mario de Andrade D

AL08 - The Upgrading and Innovation of a Multivariate Process ParametersIntelligence Control (MPPIC) Technology for Aluminum Reduction Cells 9:00am - 9:30am, Oct 30 Sala Mario de Andrade D

AL09 - Aluminium Smelters Process Optimization through Digital Twin forthe Electrolysis Cell 9:30am - 10:00am, Oct 30 Sala Mario de Andrade D

Aluminium Technical Sessions 8:00am - 10:00am, Oct 30 Sala Mario de Andrade D

Aluminium

4 Subsessions

Alumina - Digestion and Overall 1 8:00am - 10:00am, Oct 30 Sala Mario de Andrade B

Alumina

Tue, Oct 30, 2018

Optimizing the Control of Caustic Concentration in Bayer Process Liquor 8:00am - 8:30am, Oct 30 Sala Mario de Andrade B

Transformation of a Dual Stream Low Temperature Digestion Facility 8:30am - 9:00am, Oct 30 Sala Mario de Andrade B

Boehmite Bauxite Usage at Low Temperature Digestion an Case of Study atAlumar Refinery 9:00am - 9:30am, Oct 30 Sala Mario de Andrade B

Marginal Cost Analysis in Process Decision Making 9:30am - 10:00am, Oct 30 Sala Mario de Andrade B

BXxx - Title 8:00am - 8:30am, Oct 30 Sala Mario de Andrade C

Optimization of bulldozers operation increases productivity in theoverburden removal step in Juruti Unit. 8:30am - 9:00am, Oct 30 Sala Mario de Andrade C

The evolution of bauxite mining in Jamaica – modern challenges for a matureindustry 9:00am - 9:30am, Oct 30 Sala Mario de Andrade C

Research into the behavior of bauxite during shipping: an overview of theGlobal Bauxite Working Group findings 9:30am - 10:00am, Oct 30 Sala Mario de Andrade C

4 Subsessions

Bauxite Operations Improvement 1 8:00am - 10:00am, Oct 30 Sala Mario de Andrade C

Bauxite

4 Subsessions

CB01 - Hydrodesulfurization of Petroleum Coke 8:00am - 8:30am, Oct 30 Sala Mario de Andrade A

CB02 - Rheological Characterization of Pitch and Binder Matrix 8:30am - 9:00am, Oct 30 Sala Mario de Andrade A

CB03 - Superfine Grinding of CPC with Ball Race Mills – Challenges andSolutions 9:00am - 9:30am, Oct 30 Sala Mario de Andrade A

CB04 - Comparison of Pilot Anode Production and Testing Between TwoDifferent Laboratories and Ability to Simulate Full Scale Anode Production 9:30am - 10:00am, Oct 30 Sala Mario de Andrade A

Carbon Technical Sessions 8:00am - 10:00am, Oct 30 Sala Mario de Andrade A

Carbon

4 Subsessions

9:00am

Exhibition 9:00am - 5:00pm, Oct 30 Foyer

Exhibition

10:00am

Coffee sponsored by Outotec 10:00am - 10:30am, Oct 30 Foyer

10:30am

Aluminium Technical Sessions 10:30am - 12:30pm, Oct 30 Sala Mario de Andrade D

AL10 - Paradigm Shift in the Indication of a Stable Cell during PowerModulation 10:30am - 11:00am, Oct 30 Sala Mario de Andrade D

AL11 - Integrated Power Outage Restoration Capability System (IPORCS) inPotlines 11:00am - 11:30am, Oct 30 Sala Mario de Andrade D

AL12 - Networking and Centralized Monitoring Station of Pot TendingAssembly 11:30am - 12:00pm, Oct 30 Sala Mario de Andrade D

AL13 - In-house Test Rig Facility For ECL Multi-purpose Pot Line Cranes 12:00pm - 12:30pm, Oct 30 Sala Mario de Andrade D

Digital Maturity in Alumina Refining 10:30am - 11:00am, Oct 30 Sala Mario de Andrade B

Increased production through bottleneck identification tools 11:00am - 11:30am, Oct 30 Sala Mario de Andrade B

Mathematical Model for Estimation of Thermal Energy Consumption inAlumina Refinery 11:30am - 12:00pm, Oct 30 Sala Mario de Andrade B

Use of double hose-diaphragm pumps in Bayer process for aluminaproduction 12:00pm - 12:30pm, Oct 30 Sala Mario de Andrade B

Aluminium

4 Subsessions

Alumina - Digestion and Overall 2 10:30am - 12:30pm, Oct 30 Sala Mario de Andrade B

Alumina

4 Subsessions

Development of a Model to Predict Average Moisture of Bauxite Shipmentsfrom Moisture of the Stockpile, Residence Time and Rainfall 10:30am - 11:00am, Oct 30 Sala Mario de Andrade C

CFD Analysis On The Effect Of Solid Particle Size Distribution In A Bauxite-Water Pipeline. 11:00am - 11:30am, Oct 30 Sala Mario de Andrade C

REDUCTION OF HYDRATED LIME CONSUMPTION IN A BAUXITEBENEFICIATION PLANT 11:30am - 12:00pm, Oct 30 Sala Mario de Andrade C

Digital Transformation Applied to Bauxite and Alumina Business System –BABS 4.0 12:00pm - 12:30pm, Oct 30 Sala Mario de Andrade C

CB05 - Controlling the Electrical Resistivity of Vacuum Vibrated Anodes whileMaintaining High Density 10:30am - 11:00am, Oct 30 Sala Mario de Andrade A

CB06 - Effects of Water Cooling of Green Anodes on Anode FurnaceOperation 11:00am - 11:30am, Oct 30 Sala Mario de Andrade A

Bauxite Operations Improvement 2 10:30am - 12:30pm, Oct 30 Sala Mario de Andrade C

Bauxite

4 Subsessions

Carbon Technical Sessions 10:30am - 12:30pm, Oct 30 Sala Mario de Andrade A

Carbon

4 Subsessions

CB07 - Thermomechanical Characterization of the Carbon Anode DuringBaking 11:30am - 12:00pm, Oct 30 Sala Mario de Andrade A

CB08 - Optimization of Combustion in Anode Baking Furnaces Due to HeavyOil Injection Algorithm Development 12:00pm - 12:30pm, Oct 30 Sala Mario de Andrade A

12:30pm

Lunch sponsored by Fives 12:30pm - 1:30pm, Oct 30

1:30pm

AL14 - Upgrade of Fume Treatment Plants 1 and 2 of D18+ Potline at EGAJebel Ali 1:30pm - 2:00pm, Oct 30 Sala Mario de Andrade D

AL15 - Electrolytic Cell Fume Cooling Technology- Case study in MaadenAluminium 2:00pm - 2:30pm, Oct 30 Sala Mario de Andrade D

AL16 - Enhancement on Gaseous Fluoride and Sulfur Dioxide EmissionPerformance of the Outer Compartments at EGA Al Taweelah Smelter GasTreatment Center (GTC) 2:30pm - 3:00pm, Oct 30 Sala Mario de Andrade D

Aluminium Technical Sessions 1:30pm - 3:30pm, Oct 30 Sala Mario de Andrade D

Aluminium

4 Subsessions

AL17 - The Effect of Alumina Attrition Index on Breakage in Transport andHandling 3:00pm - 3:30pm, Oct 30 Sala Mario de Andrade D

Increased Flow Rate and Reduced Filtration Cost by Using Scale RetardantFilter Technology for Bayer Liquor Clarification 1:30pm - 2:00pm, Oct 30 Sala Mario de Andrade B

Process improvement: increase filters clothes residual life through use ofpolyamide as filter media of Diastar® Filters for Green liquor filtration atBayer process. 2:00pm - 2:30pm, Oct 30 Sala Mario de Andrade B

Auto Precipitation Modelling in a Thickener 2:30pm - 3:00pm, Oct 30 Sala Mario de Andrade B

Mud level Smart Sensor based on a Two-phase model of a Mud Thickener 3:00pm - 3:30pm, Oct 30 Sala Mario de Andrade B

Near Infra-Red based Mineral Phase Online Analysis of Bauxite 1:30pm - 2:00pm, Oct 30 Sala Mario de Andrade C

Inaccuracies in Estimation of Bauxite Extractable and MineralogicalConstituents

Alumina – Clarification 1 1:30pm - 3:30pm, Oct 30 Sala Mario de Andrade B

Alumina

4 Subsessions

Bauxite Analysis and Bayer Process Analysis 1 1:30pm - 3:30pm, Oct 30 Sala Mario de Andrade C

Bauxite

4 Subsessions

2:00pm - 2:30pm, Oct 30 Sala Mario de Andrade C

The Effect of Dissolved Silica on Bayer Liquor Titration -– Using the ConnopMethod 2:30pm - 3:00pm, Oct 30 Sala Mario de Andrade C

A Novel Experimental Apparatus for Red Side Studies 3:00pm - 3:30pm, Oct 30 Sala Mario de Andrade C

CB09 - Increased Reliability and Anode Quality by Using Statistical ProcessControl Tool at Paste Plant 1:30pm - 2:00pm, Oct 30 Sala Mario de Andrade A

Carbon Technical Sessions 1:30pm - 2:00pm, Oct 30 Sala Mario de Andrade A

Carbon

1 Subsessions

3:30pm

Coffee sponsored by Outotec 3:30pm - 4:00pm, Oct 30 Foyer

4:00pm

AL18 - Environmental Aspects of RUSAL’s Sustainable Development Program 4:00pm - 4:30pm, Oct 30

Aluminium Technical Sessions 4:00pm - 5:30pm, Oct 30 Sala Mario de Andrade D

Aluminium

3 Subsessions

Sala Mario de Andrade D

AL19 - Environmental Improvements at Albras through Joint Venture Project 4:30pm - 5:00pm, Oct 30 Sala Mario de Andrade D

AL20 - Extension of Life of Aluminium Smelters 5:00pm - 5:30pm, Oct 30 Sala Mario de Andrade D

Effect of various factors on particle size distribution of tricalcium aluminate 4:00pm - 4:30pm, Oct 30 Sala Mario de Andrade B

Filtration Efficiency of Tricalcium Aluminate Filter Aid Synthesised with Batchand Continuous Stirred Reactors 4:30pm - 5:00pm, Oct 30 Sala Mario de Andrade B

Application of low molecular weight dextran for improved security filtration 5:00pm - 5:30pm, Oct 30 Sala Mario de Andrade B

Adsorbed Soda Investigations at Alunorte 4:00pm - 4:30pm, Oct 30 Sala Mario de Andrade C

Estimation of AvAl2O3 and RxSiO2 by Partial Least Square Regression (PLSR)on XRD data: A case study using low grade bauxites 4:30pm - 5:00pm, Oct 30 Sala Mario de Andrade C

Alumina – Clarification 2 4:00pm - 5:30pm, Oct 30 Sala Mario de Andrade B

Alumina

3 Subsessions

Bauxite Analysis and Bayer Process Analysis 2 4:00pm - 5:30pm, Oct 30 Sala Mario de Andrade C

Bauxite

3 Subsessions

Alternative Method of Moisture Determination in Bauxite Residue fromPress Filters 5:00pm - 5:30pm, Oct 30 Sala Mario de Andrade C

5:30pm

Members Meeting 5:30pm - 6:30pm, Oct 30 Sala Mario de Andrade C

6:30pm

Grant Program Meeting 6:30pm - 7:30pm, Oct 30

8:00pm

Dinner for 2018 ICSOBA organizers & sponsors (by invitation only) 8:00pm - 10:30pm, Oct 30

8:00am

AAxx - Title 8:00am - 8:30am, Oct 31 Sala Mario de Andrade B

Hydrocycloning Technology Contribution to Productivity Improvementthrough Fines Loss Recovery and Seed Classification 8:30am - 9:00am, Oct 31 Sala Mario de Andrade B

Reduction of energy consumption improving the Calciners’ efficiency 9:00am - 9:30am, Oct 31 Sala Mario de Andrade B

What Operators Always desired - the Innovative Light Weight Plastic

Alumina – Precipitation and Calcination 1 8:00am - 10:00am, Oct 31 Sala Mario de Andrade B

Alumina

4 Subsessions

Wed, Oct 31, 2018

Segment for Big Diameter Disc Filters 9:30am - 10:00am, Oct 31 Sala Mario de Andrade B

bxxx - Title 8:00am - 8:30am, Oct 31 Sala Mario de Andrade C

bxxx - Title 8:30am - 9:00am, Oct 31 Sala Mario de Andrade C

Leaching Characteristics of CaO-Al2O3-SiO2 Slag Produced from Smelting-Reduction of Low-Grade Bauxite 9:00am - 9:30am, Oct 31 Sala Mario de Andrade C

The Effects of Regulators on Flotation Desulfurization of High-sulfur Bauxite 9:30am - 10:00am, Oct 31 Sala Mario de Andrade C

AL21 - Smart Mobile Earthing Trolley ( SET) to Operate Pot Line with FixedNull Point in Aluminum Smelter 8:00am - 8:30am, Oct 31 Sala Mario de Andrade D

AL22 - Pot Bypass Arrangement – Lifeline of Potlines 8:30am - 9:00am, Oct 31 Sala Mario de Andrade D

AL23 - Hydraulic Wedge Puller Device “Quick Start” for Removing Wedges

Low Grade Bauxite Processing 8:00am - 10:00am, Oct 31 Sala Mario de Andrade C

Bauxite

4 Subsessions

Aluminium Technical Sessions 8:00am - 10:00am, Oct 31 Sala Mario de Andrade D

Aluminium

4 Subsessions

When Energizing an Electrolysis Cell in Aluminium Smelter 9:00am - 9:30am, Oct 31 Sala Mario de Andrade D

AL24 - Installation and Commissioning of a Magnetic Compensation Loop,Booster Rectifier and Circuit by Means of Reliable and Economically EfficientBolted Joints 9:30am - 10:00am, Oct 31 Sala Mario de Andrade D

9:00am

Exhibiton + coffee 9:00am - 5:00pm, Oct 31 Foyer

Exhibition 9:00am - 5:00pm, Oct 31 Foyer

Exhibition

10:00am

Coffee sponsored by Outotec 10:00am - 10:30am, Oct 31 Foyer

10:30am

ADVANCED PROCESS CONTROL AND OPTIMIZATION OF ALUMINA CALCINERS 10:30am - 11:00am, Oct 31 Sala Mario de Andrade B

Outotec® Pretium Calciner Optimizer – Integrating Process Know-How intoDaily Operations 11:00am - 11:30am, Oct 31 Sala Mario de Andrade B

Increasing alumina trihydrate brightness at Hindalco Ouro Preto

Alumina – Precipitation and Calcination 2 10:30am - 12:30pm, Oct 31 Sala Mario de Andrade B

Alumina

4 Subsessions

11:30am - 12:00pm, Oct 31 Sala Mario de Andrade B

Alumina quality and yield improvements at Alunorte 12:00pm - 12:30pm, Oct 31 Sala Mario de Andrade B

The failure of the embankment of the red mud reservoir at Ajka (Hungary) 10:30am - 11:00am, Oct 31 Sala Mario de Andrade C

A New Approach for Red Mud Disposal Based on Mineral Paste Production 11:00am - 11:30am, Oct 31 Sala Mario de Andrade C

DRY STACKING - FILTRATION OF BAUXITE RESIDUE WITH FILTER PRESSES 11:30am - 12:00pm, Oct 31 Sala Mario de Andrade C

IMPLEMENTATION AND OPTIMIZATION OF FILTER PRESS IN RED MUDWASHING PROCESS AT ETI ALUMINIUM 12:00pm - 12:30pm, Oct 31 Sala Mario de Andrade C

AL25 - Sustainable Treatment of Spent Potlining 10:30am - 11:00am, Oct 31 Sala Mario de Andrade D

AL26 - SPL and Red Mud: Value Creation from Hazardous Wastes 11:00am - 11:30am, Oct 31 Sala Mario de Andrade D

Residue Storage Management 10:30am - 12:30pm, Oct 31 Sala Mario de Andrade C

Bauxite Residue

4 Subsessions

Aluminium Technical Sessions 10:30am - 12:30pm, Oct 31 Sala Mario de Andrade D

Aluminium

4 Subsessions

AL27 - Pitting on Carbon Cathodes in Aluminium Electrolysis Cells 11:30am - 12:00pm, Oct 31 Sala Mario de Andrade D

AL28 - Thermal Behavior of Cathode Bottom Lining at CBA 12:00pm - 12:30pm, Oct 31 Sala Mario de Andrade D

12:30pm

Lunch sponsored by GEA 12:30pm - 1:30pm, Oct 31

1:30pm

Approaches to bauxite and alumina legacy issues in Jamaica 1:30pm - 2:00pm, Oct 31 Sala Mario de Andrade C

Geomechanical Characterization of Miraí´s Bauxite Tailing 2:00pm - 2:30pm, Oct 31 Sala Mario de Andrade C

Synthesis and characterization of hydrocalumite-type material employingbauxite-washing residues from Amazon Region (Brazil) 2:30pm - 3:00pm, Oct 31 Sala Mario de Andrade C

Development of Low-Carbon, High-Durability Concrete Using BauxiteResidue and Aluminium 3:00pm - 3:30pm, Oct 31 Sala Mario de Andrade C

Residue Storage Management 1:30pm - 3:30pm, Oct 31 Sala Mario de Andrade C

Bauxite Residue

4 Subsessions

Aluminium Technical Sessions 1:30pm - 3:30pm, Oct 31

AL29 - Experimental Validation of Methods to Reduce the Anode Rod toBeam Contact Resistance 1:30pm - 2:00pm, Oct 31 Sala Mario de Andrade D

AL30 - Measurement of Electrical Insulation Resistance of Epoxy Grout andTwo Industrial Laminates for Busbar Insulation 2:00pm - 2:30pm, Oct 31 Sala Mario de Andrade D

AL31 - X-ray Diffraction (XRD) – from Bath Composition Towards Superheat 2:30pm - 3:00pm, Oct 31 Sala Mario de Andrade D

AL32 - A Calibration Set for Secondary Alumina - HAL_SecAl-XRF - CombiningXRF, XRD and Combustion Analysis 3:00pm - 3:30pm, Oct 31 Sala Mario de Andrade D

Sala Mario de Andrade D

Aluminium

4 Subsessions

3:50pm

Coffee sponsored by Outotec 3:50pm - 4:00pm, Oct 31 Foyer

4:00pm

The use of red mud and kaolin beneficiation residue in the production of anew building material: Pozzolanic pigment for colored concrete and mortar. 4:30pm - 5:00pm, Oct 31 Sala Mario de Andrade C

Recovery of rare earth elements and refractory metals from bauxite residue 5:00pm - 5:30pm, Oct 31 Sala Mario de Andrade C

Residue Reuse 4:00pm - 6:00pm, Oct 31 Sala Mario de Andrade C

Bauxite Residue

3 Subsessions

BXxx - Title 5:30pm - 6:00pm, Oct 31 Sala Mario de Andrade C

DS01 - Optimizing Sidewell Furnaces Through Mathematical Modelling 4:00pm - 4:30pm, Oct 31 Sala Mario de Andrade D

AL33 - VirtualBatteryFoam: A Multi-physics Numerical Solver to Simulate theAluminium Electrolysis Process 4:30pm - 5:00pm, Oct 31 Sala Mario de Andrade D

AL34 - Numerical Modeling of the Alumina Distribution in Aluar Cells 5:00pm - 5:30pm, Oct 31 Sala Mario de Andrade D

AL35 - Modelling the Movement of Deposits on the Surface of CathodeBlocks in Aluminium Electrolysis Cells 5:30pm - 6:00pm, Oct 31 Sala Mario de Andrade D

Aluminium Technical Sessions 4:00pm - 6:00pm, Oct 31 Sala Mario de Andrade D

Aluminium

4 Subsessions

6:00pm

The Best Papers Awards 6:00pm - 7:00pm, Oct 31 Sala Mario de Andrade C

7:00pm

2019 Program organizers meeting 7:00pm - 10:00pm, Oct 31

8:00am

Thu, Nov 01, 2018

Field Trip Albras 8:00am - 1:30pm, Nov 1 Albras

Field trip

Field Trip Alunorte 8:00am - 1:30pm, Nov 1 Alunorte

Field trip

Field Trip Paragominas 8:00am - 10:00pm, Nov 1 Paragominas

Field trip

8:00am

Field Trip Paragominas 8:00am - 2:00pm, Nov 2 Paragominas

Field trip

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Fri, Nov 02, 2018