At present, the main raw material of graphite crucible used in graphite thermal field in China is crystalline natural graphite. Therefore, it maintains the original physical and chemical properties of natural graphite. Namely, it has good thermal conductivity and high temperature resistance. In the process of high temperature use, the coefficient of thermal expansion is small, and it has certain strain resistance to rapid heat and quench. Many people may only have heard of graphite crucible. They don’t know the specific usage of graphite crucible. Let’s know what graphite crucible is for.
Graphite crucible is simply a kind of heated container. In our daily life, we may encounter some items melting when they are heated, which brings great trouble to our life. For example, we can’t use aluminium container in ironmaking because the melting point of iron is higher than that of aluminium. What we want to melt does not melt, but the container melts upside down. Changed. So at this time, graphite crucible appeared, people can use this kind of graphite crucible to smelt some metals, while ensuring smooth production can also avoid scald accidents, which is very helpful to our life. Graphite crucible is now widely used because of its high temperature non-melting and corrosion resistance, so it will be widely used in the smelting of alloy tool steel and the smelting of non-ferrous metals and their alloys. And it has a good technical and economic effect.
The types of graphite crucibles are generally divided into three categories: the first type of copper-making crucibles, whose specifications are “No”; the second type of copper-making alloy crucibles, which have 100 super-circular crucibles, 100 circular crucibles, and the third type of crucibles for steel-making, which have 100 crucibles.
Graphite crucible specifications (sizes) are usually expressed by the order number size. Crucible №1 has a capacity to melt 1000 g of brass, and its weight is 180 G. When graphite crucible melts different metals or alloys, the melting amount can be calculated by multiplying the specific weight of the crucible by the corresponding metal and alloy coefficients.