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Problems In The Application Of Magnesia Ramming And Magnesia Chrome Bricks In Copper Cooling System
Dec 20, 2018


In order to extend the life of the magnesia lining, the traditional magnesia lining has been improved. In recent years, the high-cost copper cooling plate magnesia lining technology has been adopted in China. The structure is as follows: copper cooling plate is installed close to the furnace shell, and copper cooling is performed. The expansion joint is reserved between the plate and the furnace shell. The bottom of the furnace is made of magnesium ramming material. The furnace wall is made of high-magnesia brick or magnesia-chrome brick. The inner surface is made of ceramic refractory protective layer, but in the magnesium brick. During the masonry process, the slag line and the molten iron retention zone are forcedly cooled by a copper stave. As shown in Figure 1.


Although the structure has achieved a certain effect of extending the life of the lining, there is a certain safety hazard in designing the cooling water channel inside the molten pool area, and there is a blind zone in the cooling part, and the high thermal conductivity copper cooling plate and the low thermal conductivity magnesia brick are A pair of contradictory combinations close to the hot surface (iron water end) of the magnesia brick due to poor thermal conductivity, in the initial stage of the furnace, the circulating water of the copper cooling plate can not quickly transfer the heat of the magnesia brick, can not slow the erosion of slag iron on the magnesia brick.


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