This is especially necessary when a volatile metal, like zinc, is to be added to copper, because when it is melted very suddenly, it is liable to crack the crucible. The contents of the crucible ...

Arc melting furnace can melt metals and alloys at over 3000°C with the aid of the electric arc between the non-consumable tungsten electrode and the copper crucible. Therefore, the arc furnace is a ...

The silver or alloy is to be melted in a crucible, and the amalgamated iron placed therein, when a coating of silver or alloy will be deposited. To COAT IRON WITH COPPER OR BRASS.— The copper or ...