The document provides an overview of froth flotation, including its history, basic principles, mechanics, chemicals involved, and engineering aspects. Froth flotation is a process that separates minerals by taking advantage of their different hydrophobic properties. It involves making the valuable minerals hydrophobic so they can attach to air bubbles and float, while the gangue minerals sink. Key chemicals used include collectors to modify mineral surfaces, frothers to stabilize bubbles, and regulators like activators, depressants, and pH modifiers.

1. F R O T H F L O A T N T I O A PRESENTATION ON PREPARED BY:- SWAPNIL NIGAM GUIDED BY:- PROF. M.K.MANOJ

2. CONTENTS 1.HISTORY 2.INTRODUCTION 3.BASIC PRINCIPLES 4.MECHANICS OF FLOTATION 5.CHEMICALS OF FLOTATION 6.SCIENCE OF FLOTATION 7.ENGINEERING OF FLOTATION 8.REFERENCES

4. NOW LET US MOVE TO

8. AIR IN MINERALISED FROTH PULP AIR BUBBLE CELL AGITATOR MINERALS’ PARTICLES ATTACHED TO BUBBLE

11. WHERE, in the above equation, Γ W/A , Γ S/A , Γ S/W are the SURFACE ENERGIES between water-air, solid-air, solid-water interface and θ is the CONTACT ANGLE. NOW, let W S/A is the WORK OF ADHESION, i.e. , the force required to break the particle-bubble interface, THEN, W S/A = Γ W/A + Γ S/W – Γ S/A W S/A = Γ W/A - Γ W/A COS θ W S/A = Γ W/A (1- COS θ )

15. COLLECTORS NON-IONISING IONISING ANIONIC CATIONIC OXYHYDRYL SULPHYHYDRYL SULPHATES SULPHONATES DITHIOPHOSPHATES XANTHATES CARBONATES (LIQUID NON-POLAR HYDROCARBONS, INSOLUBLE IN WATER.)

17. POLAR GROUP NON-POLAR GROUP MINERAL

21. C C C C C C C C C C C C C C C C C O O Na POLAR GROUP NON-POLAR GROUP CATION ANION SODIUM OLEATE C

23. C O H C C H H H H S S Na SODIUM ETHYL XANTHATE CATION ANION POLAR GROUP NON-POLAR GROUP

27. WATER AIR IN FROTHER

43. SCAVENGERS ROUGHERS CLEANER FEED TAILINGS FINAL CONCENTRATES TAILINGS CLEANER'S

45. WASHWATER FROTH PHASE (CLEANING ZONE) FEED INLET AIR INLET TAILINGS OUTLET PULP PHASE (RECOVERY ZONE) CONCENTRATE OUTLET

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