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What role does coke play in a lead blast furnace?
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lead processing
A zinc-lead blast furnace and lead-splash condenser. This technology is utilized mainly for producing zinc while managing both lead and zinc from raw materials, a technique that was highly influential in 20th-century smelting.
In a lead blast furnace, coke serves two essential functions: it acts as a fuel to generate the necessary heat for the smelting process and provides the chemical environment required for reduction.1
When a charge of lead oxide sinter, coke, and flux is fed into the furnace, the coke reacts to create a strong reducing atmosphere within the furnace shaft. This environment is critical for the chemical reduction of lead oxide into metallic lead. As the process occurs, the liquid lead and slag collect in the furnace hearth, where they are separated into two distinct layers.1