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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY
HYDERABAD
III Year B.Tech. Met.E. I-Sem T P C
0 3 2
PRINCIPLES OF EXTRACTIVE METALLURGY LAB
List of Experiments:
1. Pyrometry:
1.1 Calcination: To demonstrate the phenomenon of differential calcinations (of dolomite).
To study the effect of temperature on rate of calcination of dolomite or lime stone.(Temperatures 500,550,600,650 and 750 degrees celsius)(Time : 1 hour)
To study the effect of time on rate of calcinations of dolomite or lime stone.
(Time: 15 mts,30 mts,45 mts,60 mts,75 mts- Temperature 6000C)
1.2 Roasting:
To demonstrate the hearth roasting of Zinc or lead concentrate. To study the effect of time on roasting.
2. HydroMetallurgy:
2.1 Leaching of MgO:
To demonstrate the phenomenon of leaching. To study the effect of concentration of leach liquor on the rate of leaching. To examine the effect of pH of leach liquor on leaching. To study the effect of stirring speed on rate of leaching.
2.2 Recovery of metallic values from leach liquid: To demonstrate the cementation process and to precipitate copper values from pregnant solution.
3. Electro Metallurgy:
3.1 Electro Winning:
To examine the recovery of metallic values of electro winning of copper sulphate/ Zinc Sulphate leach liquid.(Weight deposited is calculated.) To determine the current efficiency of the cell.
3.2 Electro Refining: To demonstrate the Electro refining of copper. To find out the purity of electro refined copper and compare with that of the impure copper.
3.3 Electro forming , electro plating, electro polishing and electro etching: To demonstrate the phenomena of electro forming using copper sulphate solution. To determine the thickness of the deposited copper layer and to study the Faraday’s laws of electrolysis. To prepare the sample for metallographic examination by electro polishing and electro etching.( Ortho phosphoric acid solution –Stainless cathode- Brass anode.)
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| Author: India 22 Dec 2007 | Member Level: Diamond Points : 5 |
To study the differences between electro plating , electro polishing, electro etching, electro forming, electro refining, and electro winning techniques.
4. Preparation of burden for extraction:
4.1 Agglomeration techniques:
4.1.1Sintering: To demonstrate the phenomena of sintering.
4.1.2Pelletizing: To demonstrate the palletizing using a laboratory scale disc pelletizer.
4.1.3 Briquetting: To demonstrate briquetting.
4.1.4 Testing of prepared burden, shatter index test.
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