What is the difference between pyrometallurgy, hydrometallurgy, and electrometallurgy?

Here’s the difference:

• Pyrometallurgy – Uses high heat to get metals. (Example: Iron from ore)
• Hydrometallurgy – Uses water or chemicals to get metals. (Example: Silver from cyanide solution)
• Electrometallurgy – Uses electricity to get metals. (Example: Aluminum from aluminum oxide)

Easy way to remember: Heat → Water → Electricity.