Mathieu HENRY Centre Terre et Pierre, Tournai (Belgium) C ENTRE T - - PowerPoint PPT Presentation

Mathieu HENRY Centre Terre et Pierre, Tournai (Belgium)

CENTRE TERRE ET PIERRE

• CTP: mineral processing expertise including grinding, classification and separation

DRY TREATMENT OF SOILS

• Combination of sieving, drying and disagglomeration to

create a bicycle path in concrete with sediment

• Aim: substituting sand by sediments (max: 50%) in

concrete formulation Passing Refusal Exogenous: stones, bottles, glass, wood

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Sieving Drying Disagglomeration

THERMAL TREATMENT

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Rotating dryer Laboratory rotary kiln 2 stages pilot rotary cement kiln Pilot calcining Unit

WET TREATMENT OF SOIL

Hydrocyclone 15µm Feed hopper Trommel

Tank n°1 Tank n°2

Dec. n°3

• 3 mm; +250 µm

+3 mm

• 63; +15 µm
• 15 µm

Curved screen

• 250; +63 µm

Spirals Dec. n°1 Dec. n°2 Flotation Screw classifier

Tank n°3

Filter press Hydrocyclone 63 µm Flocculation Vibrating screen Input

• 15µm
• 63;+15µm
• 250µm
• 63µm

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Attrition

REMOVAL OF EXOGENOUS AND COARSE SAND

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Input Exogenous: +3 mm

• 2 mm
• 250 µm

Coarse sand:

• 3 mm;+250 µm

1,2 t/h DM 40-80% DM 1,2 t/h DM 30-40% DM 1,2 m3/h 10-20 % DM

REMOVAL OF FINE SAND

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Fine sand:

• 250;

+63µm

• 250 µm

1,2 m3/h DM: 10-40% 0,8 m3/h DM: 10-40%

• 63 µm

SEPARATION OF SILT AND CLAY

• 63µm
• 15µm

(clay and silt) Silt:

• 63;+15µm

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0,8 m3/h; DM: 5-30% 0,8 m3/h DM: 15-40% 32 m3; 0,5 m³ /h 2 x 5 m3 30 plates 800 x 800 mm; 15 bar 0,5 m³ /h; 1 ton DM/batch

• Aim: encapsulate pollutants to avoid their liberation in the environment
• Overall by adding chemicals or secondary materials (lime, slag, fly ash, H3PO4,…)
• Characterization: PSD, chemical analysis

SOILS SOLIDIFICATION/STABILIZATION

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Leaching tests Optimum Proctor Mixing IPI

Thank you for your attention

Centre Terre et Pierre asbl

Mathieu HENRY Chercheur

Chaussée d'Antoing, 55 B-7500 Tournai, Belgique T: +32 (0)69 88 42 31 F: +32 (0)69 88 42 59 mathieu.henry@ctp.be www.ctp.be