| 摘要 |
Aluminum reduction cell refractory material comprises a bottom and side lining in the form of blocks, slabs and bricks. The bottom and side linings are made of carboceramic bonded by a tar-pitch-binder. An Independent claim is also included for a process for the manufacture of carboceramic blocks, pastes or bricks comprising: mixing at 150-200 degreesC fine calcined oxides with electrode pitch and powdery additives like silicon, nitrides, graphite or coke; molding or forming into preforms like saggars, brickets or extrusion billets; baking the preforms at temperatures of 1000-1200 degreesC for a time sufficient to produce at least 50% carbon oxides; crushing and screening the carbon oxide material into different particle fractions; mixing the carbon oxide particles at 50-200 degreesC with pitches and additives like silicon, nitrides, graphite or coke to form a green mix which can be used as rumming paste; and vibroforming the green mix to green blocks or baking the green mix to baked blocks and machining it into carboceramic blocks.
|
