What is mineral wool primarily made from?

Mineral wool, also known as rock wool or slag wool, is primarily made from silica sand and various natural or recycled mineral materials. The production process involves melting these materials at high temperatures, then spinning or blowing the molten rock or minerals to create fibers. These fibers are then collected and used for insulation purposes due to their excellent thermal and acoustic insulation properties.

Silica sand is a key component because it is abundant and provides the base for the fiber structure, while the inclusion of other minerals enhances the characteristics of the final product. This is why the answer highlighting silica sand and carbon byproducts is correct; it captures the essence of the primary materials involved in the production of mineral wool.

In contrast, options that suggest wood fibers and plastics or recycled paper and cellulose do not align with the material composition of mineral wool. These materials are typically associated with different types of insulation products. Additionally, the reference to glass particles and metals does not accurately represent mineral wool, as it focuses on unreinforced fibers made solely from mineral materials. Understanding the specific components that constitute mineral wool helps clarify its applications and performance in insulation.