| abstract |
A lightweight refractory composition is provided that includes a calcium aluminate aggregate and a phosphate binder intermixed with the calcium aluminate aggregate to form the lightweight refractory composition. The calcium aluminate aggregate includes monocalcium dialuminate, monocalcium hexa-aluminate, or combinations thereof. The phosphate binder includes phosphoric acid or a chemical derivative thereof. The lightweight refractory composition shows excellent thermal conductivity, reduces the depth of penetration of reactants, and controls the depth of unwanted buildup, such as coke buildup, when exposed to molten compounds, such as molten metals. |