These furnaces are typically heated by either electricity or natural gas. Electric furnaces use resistance heating elements, while gas-fired furnaces rely on combustion to generate heat. The choice of energy source depends on the specific requirements of the operation, including the volume of aluminum to be melted, cost considerations, and environmental impact. Both types of furnaces ... https://www.silcarb.com/industrial-furnaces/crucible-type-aluminium-melting-furnaces.php