A crucible furnace is a type of furnace used for melting and refining metals and other materials. It operates at high temperatures, allowing for the processing of materials like gold, silver, and copper. The furnace typically contains a crucible, which is a container made from heat-resistant materials that can withstand extreme temperatures. These furnaces are commonly used in metalworking and foundries, where precise temperature control is essential for achieving desired material properties. The design of a crucible furnace can vary, but it often includes features like insulation and a controlled atmosphere to prevent contamination during the melting process.