The invention discloses an
alumina bubble lightweight insulating
refractory casting material, which comprises the following components in percentage by weight: 10 to 50 percent of
alumina bubbles, 5 to 15 percent of
mullite with the grain
diameter of 5 to 3 millimeters, 5 to 20 percent of
mullite with the grain
diameter of 1 to 3 millimeters, 10 to 20 percent of
mullite with the grain
diameter of 0 to 1
millimeter, 1 to 13 percent of swelling agent, 10 to 25 percent of
fine powder, 10 to 20 percent of micro
powder, 0.1 to 1 percent of water
reducing agent and 5 to 20 percent of composite
aluminate cement. The
casting material has the characteristics of carrier weight reduction, high
temperature resistance, good heat insulation effect, large strength, convenient and practical operation, and suitability for being used at the temperature of between 1,000 and 2,000, can be used for integrally
casting, spraying,
coating and repairing, and not only meet the requirement of
smelting special steel, but also meet the requirements of
refractory materials for hot-blast stoves, furnace tops, furnace walls,
petrochemical cracking furnaces, systems for
chlorine and
sulfur removal,
slag discharge and catalytic
cracking, electric
fluidized bed boilers, flues and the like.