Not all refractories are created equal: the acidic, basic and neutral classifications help the user in their choice of optimal refractory material.
Foundry burn on is a name given to a wide variety of surface defects that are produced at high heat during the metal sand casting process. Carbonaceous materials in the mold, such as high-anthracite coal dust can prevent such defects from forming.
Bentonite is a form of clay that has found numerous uses over its thousands of years of use - but perhaps most notably in foundries from the 1900’s onwards, alongside powdered coal.
Chrome sand is used in high-quality castables for producing precision castings when held together using organic resin- or inorganic type- binders.
Anthracite is one of the hardest forms of coal and is known for its high carbon content. Aside from as a fuel, anthracite finds use in high temperature applications - especially when calcined - due to its relatively high resistance to thermal shock, strength and chemical inertness.
Glass powder isn’t just good for making new glass - it also has applications in the furnaces used to make glass and beyond.
Coal dust (powdered anthracite), a relatively inexpensive and useful material, has a wide variety of uses in the refractory environment.
Filler sands are without question a necessity in steel production. Furthermore, chromium-based filler sands are preferred and widely used in the foundry industry.
Refractory materials are an integral part of foundries and other high-temperature operations; chrome compounds can add useful properties to well-established materials.
Green sand is a compound mixture used for casting of metals, the most widely used moulding type in furnace and foundry applications.