Graphite crucible, also known as roasted copper, is a type of crucible made by firing graphite, clay, silica, and wax as raw materials. The graphite crucible is mainly made of natural flake graphite as the main raw material, and is processed with plastic fire clay to form carbon as the bonding agent.
Characteristics of graphite crucibles
The production technology level of domestically produced graphite crucibles has reached or even exceeded that of imported crucibles, and every possible method has been adopted in raw materials, production, and other aspects to meet the use under harsh conditions.
The main features are as follows:
High thermal conductivity: Due to the use of raw materials such as graphite with high thermal conductivity, the melting time is shortened;
Heat resistance and shock resistance: With strong heat resistance and shock resistance, it is not easy to break due to sudden cooling and heating;
High heat resistance: can withstand high temperatures of 1200~1600 ℃;
Corrosion resistance: Strong resistance to the erosion of molten soup.
The application of graphite crucibles
Graphite crucibles have outstanding thermal conductivity and high temperature resistance. During high-temperature use, their coefficient of thermal expansion is small, and they have certain strain resistance for rapid heating and cooling. Strong corrosion resistance to acidic and alkaline solutions, with excellent chemical stability. Therefore, it is widely used in the smelting of dry alloy tool steel and non-ferrous metals and their alloys.