The paper analyses the reason for furnace hearth shape deformed and hearth overdevelopment cause by aluminum level rising of 240kA pre-bake aluminum electrolytic cell,introduces solve measures and the effects achieved.

Compared between low and high aluminum level production,it is proved that high aluminum level was very important to improve the electric current efficiency.

The feasibility of aluminum/water reaction is introduced.

Application of 5454 Aluminum Water Container in NH_4-cleaning Tower;

Limestone powder was used as a filler to modify high alumina cement.

In the high alumina cement, dicalcium aluminate silicate is transformed into Q phase.

Using grog,haydite as aggregate,high alumina cement as binder,and using compound early strength agent,the high strength haydite castable material produced successfully This castable material has the characters of early strengthened,good heat preservation,good resistance to wear,small volume density and good constraction property,etc This castable material has good utilization effect in productio