FROTH FLOTATION- SWAPNIL NIGAM

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

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

[object Object],[object Object],[object Object],HISTORY

INTRODUCTION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

basic principles ,[object Object],[object Object],[object Object],[object Object],[object Object]

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

MECHANICS OF FLOTATION ,[object Object],[object Object],[object Object],[object Object]

BUBBLE SOLID WATER Γ W/A Γ S/W Γ S/A θ ,[object Object],Γ W/A COS θ Γ S/W Γ S/A = -

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 )

From the above Equation, it can be seen that, Greater the Contact Angle ; Greater is the W S/A , i.e. WORK OF ADHESION between particle and bubble and thus more resilient is the system to the disruptive forces. Contact Angle around 90° is sufficient. ,[object Object],[object Object]

chemicalS OF FLOTATION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

COLLECTORS ,[object Object],[object Object],[object Object]

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

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

POLAR GROUP NON-POLAR GROUP MINERAL

NON-IONIC COLLECTORS ,[object Object],[object Object],IONIC COLLECTORS ,[object Object],[object Object]

Anionic Collectors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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

[object Object],[object Object],[object Object],[object Object],[object Object],P S S RO RO Na(K)

Cationic Collectors N R R OH(X) R R ,[object Object],[object Object],[object Object],[object Object],[object Object]

FROTHERS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],CH 3 CH 3 OH CH 3 4-Methyl-2-pentanol (MIBC)

ACTIVATORS ,[object Object],[object Object],[object Object],[object Object],ZnS(s) Xanthate Zn Xanthate S(s)

[object Object],ZnS(s) CuSO 4 Cu S(s) Zn SO 4 ,[object Object],[object Object]

DEPRESSANTS ,[object Object],[object Object],[object Object],[object Object],[object Object]

INORGANIC DEPRESSANTS ,[object Object],[object Object],[object Object],[object Object],[object Object]

NaCN H O 2 CN H Na OH CN H H CN + ,[object Object],3CN Cu 2+ Cu (CN) 2 [ ] 1/2 C N 2 2 CUPRO-CYANIDE (soluble complex)

[object Object],[object Object],[object Object],[object Object]

ORGANIC DEPRESSANTS ,[object Object],[object Object],[object Object],[object Object],[object Object]

pH MODIFIERS ,[object Object],[object Object],[object Object]

[object Object],[object Object],COLLECTOR’S CONCENTRATION (in mg/L) pH VALUE 0 100 300 400 500 600 700 200 2 5 6 7 8 3 4 9 10 11 PYRITE GALENA CHALCOPYRITE

SCIENCE OF FLOTATION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],k = P R f S b

[object Object],[object Object],S b = 6 J g d b Where, J g = Superficial Gas Velocity (m/s) and d b = Sauter Mean Bubble Diameter (m)

ENGINEERING OF FLOTATION ,[object Object],[object Object],[object Object]

[object Object],[object Object]

FEED TAILINGS SCAVENGERS CELLS FINAL CONCENTRATES ,[object Object]

SCAVENGERS ROUGHERS CLEANER FEED TAILINGS FINAL CONCENTRATES TAILINGS CLEANER'S

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],FLOTATION M/C(s)

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

REFERENCES ,[object Object],[object Object],[object Object]

THANK YOU FOR YOUR CO-ORDINATION

FROTH FLOTATION- SWAPNIL NIGAM

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