Q1: What is Smelting?
Ans: Smelting is the process of extracting metal from its ore by heating it at high temperature in a furnace.
It involves melting the ore and separating the metal from impurities.
Q2: What is Presmelting?
Ans: Presmelting is the treatment of ore before smelting to remove impurities and improve efficiency of metal extraction.
Q3: Briefly explain the Presmelting of Iron Ores.
Ans: Presmelting of iron ores includes processes like crushing, grinding, concentration, and agglomeration.
These steps help in removing impurities and preparing the ore for efficient smelting.
Q4: State the types of Presmelting Treatment.
Ans: Types of presmelting treatment are:
- ➔ Crushing and Grinding
- ➔ Concentration
- ➔ Agglomeration
- ➔ Roasting
Q5: Briefly explain the Concentration Process.
Ans: Concentration is the process of removing gangue from ore to increase the percentage of useful metal.
It improves the quality of ore before further processing.
Q6: State the types of Concentration Process.
Ans: Types of concentration processes are:
- ➔ Hand Picking
- ➔ Magnetic Separation
- ➔ Gravity Separation
- ➔ Froth Floatation
Q7: What is the Jigging process?
Ans: Jigging is a gravity separation process in which water is used to separate heavier ore particles from lighter impurities.
Q8: What is the Washing Process?
Ans: Washing process is used to remove impurities like clay and sand from ore by using water.
Q9: Briefly explain the Agglomeration Process.
Ans: Agglomeration is the process of converting fine ore particles into larger lumps for easy handling and smelting.
Q10: State the types of Agglomeration Process.
Ans: Types of agglomeration processes are:
- ➔ Sintering
- ➔ Nodulising
- ➔ Pelletising
Q11: Briefly explain the Process of Sintering.
Ans: Sintering is the process of heating fine ore particles below melting point to fuse them into larger solid lumps.
Q12: Briefly explain the Process of Nodulising.
Ans: Nodulising is the process of converting fine ore into small rounded lumps by heating in a rotary kiln.
Q13: Briefly explain the Process of Pelletising.
Ans: Pelletising is the process of forming small spherical pellets from fine ore particles using moisture and binders.
Q14: What is Up-Draughting?
Ans: Up-draughting is a process in which air flows upward through the material in a furnace.
Q15: What is Down-Draughting?
Ans: Down-draughting is a process in which air flows downward through the material in a furnace.
