Name the method used for removing gangue from sulphide ores. How is wrought iron different from steel?

a. Froth flotation is the process employed to remove gangue from sulphide ores.
b. 1. Wrought iron contains pure iron with a glassy material which is iron silicate while in steel carbon content is also present.
2. Steel has more tensile strength and more vulnerability to corrosion than wrought iron.
3. Steel products require more intensive workmanship as compared to wrought iron.