The smelting of iron in a blast furnace involves, which of the following process(es)?

The following operations are performed during the iron-smelting process in a blast furnace:

1. Combustion:

The hot waste gases at the top of the furnace heat the air blown into the bottom of the furnace. Coke, which is simply impure carbon, burns in the hot air burst to produce carbon dioxide, which is a highly exothermic process.

2. Reduction:

Carbon dioxide and carbon interact at the high temperature at the furnace's bottom to form carbon monoxide. the primary reducing agent in the furnace, carbon monoxide. It converts ferrous oxide into ferrous.

3. Slag formation:

Limestone is added to transform rocky material into slag, which melts and sinks. Calcium oxide is produced when the limestone is broken down by the furnace's heat.