Metallurgy

What is the crushing of ore into fine powder is called

• Pulverisation

• Gravity separation

• Froth- floating process

• Leaching

Answer explanation

Pulverisation is done to increase the surface area

Gravity separation is also known as

• Magnetic separation

• Froth floating process

• Hydraulic washing

• Roasting

Answer explanation

As water is used for Concentration

Which Ores are used in gravity separation

• Oxide ores

• Carbonate ores

• Both oxide Ores and carbonate ores

• Both carbonate and sulphide ores

Which instrument is used in gravity separation

• Wilfley's table

• Hydraulic classifier

• Any one of them

• None of them

Which type of physical separation is shown in the figure

• Magnetic separation

• Smelting

• Calcination

• Leaching

Draw the diagram of froth floating process

Name the collecting agent of froth process

• Pine oil

• Sodium ethyl X anthate

• Magnetic impurities

• None of these

Name the frothing agent in froth floating process

• Impurities

• Pine oil

• Water

• Ore

The method of froth floating process is based on the difference in which properties of ore and impurities

• Weting property

• Magnetic property

• Heating property

• Cooling property

The Ores wet by _______ and the impurities by _____

• Pine oil, water

• Sodium ethyl, anthate

• Collecting agent, froting agent

• None of these