Mineral Processing — Winter 2024

List out ores and Minerals for Mg, Al and Cu with their chemical composition.

Write in brief about the scope of mineral processing in the field of extractive metallurgy.

What are the advantages of mineral processing? Draw a simplified flowsheet for the various processes involved in mineral processing.

What are the characteristics of a jaw crusher ?

What do you understand by locking and unlocking of minerals and gangue.

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

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

Discuss the main purpose of fine grinding during mineral dressing ?

Estimate the diameter of a set of rolls to take feed of a size equivalent to 50 mm sphere and crush to 12 mm if the coefficient of friction is 0.60?

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

What is the difference between Crusher and Grinder ?

In a smooth roll crusher, the feed size of material is 15 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.

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

Write the advantages and disadvantages of heavy media separation process.

Discuss about Electrostatic Separators.

Describe with a suitable flowsheet the beneficiation of Iron ore.

What is Rittinger’s crushing law ?

Discuss briefly about Magnetic Separation Process.

Describe with a suitable flowsheet the beneficiation of Bituminous coal.

What is the role of frothers and activators in floatation process?

Explain sieve analysis in brief.

Describe the working principle of concentration table with suitable diagram.

Write a short note on jigging operation?

Explain the concept of free settling and hindered settling ?

What is classification? Name different types of classifiers and explain air classifier.