Question

What is slag?

Hint:

Slag is often considered a valuable resource for industries, particularly in the production of cement and other materials.

Answer 1

Step 1: Definition of Slag.
Slag is a by-product of metal smelting, formed when impurities in the metal ore combine with flux (a substance used to remove impurities during smelting). Slag consists of metal oxides and other compounds and floats on top of the molten metal due to its lower density.
Step 2: Formation of Slag.
During the smelting of metals like iron or copper, the flux combines with the gangue (impurities) to form slag. The slag is then removed from the top of the molten metal.
Step 3: Uses of Slag.
- Slag is used in the production of cement and as a building material. - It can also be used as a fertilizer due to its mineral content.
Final Answer: Slag is the by-product of metal smelting, consisting of metal oxides and other compounds, and is used in various industrial applications.
Final Answer: \[ \boxed{\text{Slag is a by-product of metal smelting, composed of metal oxides, and used in industries like cement production and construction.}} \]