The calcium in the limestone combines with the silicates to form slag . At the bottom of the blast furnace, liquid iron collects along with a layer of slag on top. Periodically you let the liquid iron flow out and cool. Typically the liquid iron flows into a channel and indentations in a bed of sand. Once it cools, this metal is known as pig iron .
Wrought iron is the stuff a blacksmith works with to create tools, horseshoes, and so on.
When you heat wrought iron, it is malleable, bendable, weldable and very easy to work with. Inc. All rights reserved. Simply register for a free Postbox in the country where your merchant is located.