Mineral Processing — Winter 2023

Define: Mineral, Ore and Concentrate.

Define classification. Explain about sizing and sorting.

List out ores/minerals of metals like Al, Cu, Fe, Zn, Pb, Sn and Mg with their chemical composition.

What is the difference between Crushing and Grinding ?

Explain the comminution and mechanism of comminution.

Give classification of crushers. Explain Black Jaw Crusher with neat diagram.

Define the term classifier. Explain the working process of any classifier with the help of a schematic diagram.

Discuss different grinding media.

In a smooth roll crusher, the feed size of material is 10 mm (spherical) and the product size desired is below 5 mm. Calculate the minimum diameter of rolls under limiting conditions. Assume coefficient of friction between material and roll to be 0.3.

Discuss the physio-chemical principles involved in froth floatation? Discuss various reagents used in froth floatation process.

Explain the different variables in ball mill.

If crushing rolls of 100 cm diameter are set so that the crushing surfaces are 1.3 cm apart and angle of nip is 31°. What is the maximum size of particles which should be fed to the rolls ?

Derive an equation for the critical speed of a ball mill. What is the effect of speed of the mill on the grinding action ?

Write a short note on Heavy Media Separation.

Explain the Rittinger’s Law and Kick’s Law.

Explain with the help of flowsheet how the copper ore is processed by flotation process?

Write a short note on Gravity concentration methods.

Discuss the theory of ball mill operation with neat sketch showing different zones in a ball mill.

Draw the flow sheet for the flotation process adopted for concentration of zinc ores.

What do you mean by Frothers, Collector and Modifier.

Draw simplified beneficiation flow sheets of Iron ore.

Explain the principle of magnetic separation and mention the process1 description.

What is free settling and hindered settling.

Draw simplified beneficiation flow sheets of Bituminous coal.

What is Jigging? Explain its principles and applications.2