High temperature heat conduction castable

Abstract

The invention discloses a high-temperature heat-conduction castable. The high-temperature heat-conduction castable comprises the following components: black silicon carbide aggregate, silicon carbidefine powder, alumina micro powder, metal aluminium powder, silicon ash, aluminate cement, anti-explosion fiber, and BASF F10. The fireproof temperature of the high-temperature heat-conduction castablecan achieve 1610 DEG C, the thermal conductivity is good, a protection layer having a thickness being 30-50 mm is casted at a membrane-type wall of an exhaust-heat boiler or an aluminium zinc refinement crucible lining by the high-temperature heat-conduction castable, and the high-temperature heat-conduction castable and the metal has good bonding performance and cannot be easily shed, the formedprotective layer has the advantages of flue gas resistance, fusion zinc-aluminium corrosion, and no heat transfer of the membrane-type wall of the exhaust-heat boiler, a boiler pipe and a metal crucible, so that the service life of the membrane-type wall of the exhaust-heat boiler, the boiler pipe and the metal crucible are prolonged, the service life of the metal crucible is increased from original one month to one year, and the service life of the membrane-type wall of the exhaust-heat boiler and the boiler pipe is increased from original one year to three years and above.

Description

technical field [0001] The invention relates to the technical field of refractory materials. Specifically, it is a high-temperature heat-conducting castable. Background technique [0002] In the process of refining aluminum and zinc in a vacuum furnace, metal crucibles are often used to hold zinc and aluminum because of the good thermal conductivity of metals. However, when the molten zinc-aluminum liquid in a high-temperature state contacts the metal crucible, alloy slag will be formed, which will corrode the metal crucible, which not only increases the difficulty of impurity removal, but also shortens the service life of the metal crucible and increases the cost. In addition, in response to the national call for energy conservation, environmental protection, and emission reduction, waste heat boilers are used to process and utilize the waste heat of the flue gas generated by waste incinerators. The walls and metal boiler tubes are severely eroded by acidic or alkaline fl...

AI Technical Summary

Problems solved by technology

However, the molten zinc-aluminum liquid in a high-temperature state will form alloy slag in contact with the metal crucible, which will corrode the metal crucible, which not only increases the difficulty of impurity removal, but also shortens the service life of the metal crucible and increases the cost.

In addition, in response to the national call for energy conservation, environmental protection, and emission reduction, waste heat boilers are used to process and utilize the waste heat of the flue gas generated by waste incinerators. The walls and metal boiler tubes are severely eroded by acidic or alkaline flue gas, and the surface is severely oxidized and the oxide scales continue to fall off, which shortens the life of the membrane wall and boiler tubes of the waste heat boiler, endangers safe production, and the cost of maintenance or replacement after corrosion is very high

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