Composite heat-insulated furnace surface prefabricated block for aluminum anode carbon roasting furnace flue wall

Abstract

The invention discloses a composite heat insulation type furnace face prefabricated block for an aluminum anode carbon roasting furnace flue wall. The composite heat insulation type furnace face prefabricated block comprises a prefabricated material pouring body which is of a cuboid structure and is provided with a fire jet opening in the middle, bearing nets and heat insulation layers, wherein the bearing nets and the heat insulation layers are sequentially and horizontally embedded into the portions, located on the two sides of the fire jet opening, of the upper portion of the prefabricated material pouring body from top to bottom. L-shaped reinforcing frames are pressed on the edge of the periphery of the upper surface of the prefabricated material pouring body in a buckled manner. The composite heat insulation type furnace face prefabricated block is a composite body composed of refractory castable, the L-shaped reinforcing frames, the bearing nets, the heat insulation layers and other materials, and the requirements for fire resistance, collision prevention, heat insulation performance, load-bearing performance and anti-skidding performance of the furnace face prefabricated block for the flue wall are met; and the refractory castable sintered bauxite with the high strength and high performance is adopted as a host material for the furnace face prefabricated block, so that the finished prefabricated block has high strength, micropores and the medium or high specific gravity and is high in performance. A manufacturing method of the composite heat insulation type furnace face prefabricated block is simple, the process parameters are easy to control, and high-temperature sintering is not needed; and the pouring material formula is changed for different portions, and the field actual requirements of different portions of the prefabricated block are met.

Description

technical field [0001] The invention relates to a flue wall of an anode carbon roasting furnace for aluminum, in particular to a composite heat-insulating furnace surface prefabricated block for the flue wall of an anode carbon roasting furnace for aluminum. Background technique [0002] my country's aluminum anode carbon roasting furnace technology has been applied since the 1950s. Although there have been several major innovations and great progress, the materials used for the core part of the carbon roasting furnace are dozens of times. Years have not changed. The flue wall is an important key structure of the annular roaster. The furnace surface prefabricated blocks poured on the surface of the flue wall as a whole are easily damaged by mechanical impact due to the position of frequent operation; at the same time, under high temperature working conditions , the prefabricated block on the furnace surface also needs to bear a certain vibration pressure, especially the oper...

AI Technical Summary

Problems solved by technology

For a long time, the furnace surface of roasting furnaces in my country has generally been prefabricated with castables with high thermal conductivity, so that the surface temperature of the prefabricated blocks is mostly above 60°C, and even reaches above 90°C in the middle and late stages of furnace life. The working environment cannot be improved, resulting in Operators are exposed to high temperature for a long time

Although domestic design units and refractory manufacturers try to superimpose lightweight castables on the upper surface of the furnace surface prefabricated block as a heat insulation layer, but due to the limitation of material performance, they have not solved the problem of pressure bearing, collision resistance and heat insulation performance. Contradictory; at the same time, due to the special position of the prefabricated block on the furnace surface, safety and anti-slip must also be required

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