The iron obtained directly from the blast is called

Iron is obtained by extracting it from iron ore in a large container, called a blast furnace. The blast furnace is necessary to smelt the iron out of the ore. Smelting is a process in which the iron ore is heated until it becomes spongy and the chemicals in the ore begin to break down.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.