|Use||Metal Extraction, Water Purification|
|Fixed Carbon||From 50% to 95%|
|Volatile Matter||From 6% to 1%|
The use of graphite as a refractory material began before 1900 with the graphite crucible used to hold molten metal;
this is now a minor part of refractories. In the mid-1980s, the carbon-magnesite brick became important,
and a bit later the alumina-graphite shape. As of 2017 the order of importance is: alumina-graphite shapes,
carbon-magnesite brick, monolithics (gunning and ramming mixes), and then crucibles.