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Influence of the adhesive materials on the lining of hot wind pipes refractories

The alkali metal and zinc are enriched in the blast furnace, which will affect the operation of the blast furnace and cause the lining to be eroded.

Therefore, the design of the material and structure of the refractory brick lining of the working layer of the hot wind pipes needs to consider the backflow, deposition, reaction and damage to the lining from alkali metal, zinc vapor, sulfide and chloride in the blast furnace during the production operation.

The adhesive materials on the lining of hot wind pipe are consisted of Al2O3, Fe2O3, SiO2, ZnO, MgO, CaO, K2O, Na2O and others, the compositions of different crystalline phases and bases are different. The formation of adhesive materials on the lining of hot wind pipes was related to the back-flow vapors by the volatilization of dust, alkali metal oxides, zinc, sulfide and chloride condensation which may be reacted with the lining of hot wind pipe. It is harmful to the attachment of adhesive materials on the lining, especially alkali metal oxides, sulfide and chloride which can influence the high-temperature properties of pipes inner lining.

The influence of alkali metal oxides, sulfide and chloride must be considered to the production and design of refractories for hot wind pipes.

Tags: hot wind pipes, refractories, adhesive materials,

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