Explain how adding scrap steel to iron from a blast furnace can reduce the amount of iron extracted from ore.

In the subtopic Ways of reducing the use of resources, this learning objective focuses on explain how adding scrap steel to iron from a blast furnace can reduce the amount of iron extracted from ore. Within Life cycle assessment and recycling, students should explain this idea in the exact curriculum context rather than as an isolated fact. Approved keywords for this objective include reduce, scrap steel, and blast furnace. scrap steel means recycled steel that can be added to iron in a blast furnace to reduce the amount of iron extracted from ore. Avoid students often think adding scrap steel to the blast furnace simply replaces the iron ore, so no iron is extracted at all; instead explain that scrap steel is melted and mixed with molten iron in the blast furnace, reducing the amount of iron ore that must be extracted and processed, but iron is still produced from the ore to meet the required iron content. For exam answers, explain how adding scrap steel to the blast furnace process reduces the need for extracting iron from ore.