| 摘要 |
Alumina slurries (suspensions) can be stabilized against viscosity increases by treating with water which has been heated to temperatures of from about 40 DEG C. to about 100 DEG C., then cooling, decanting the water, and recovering a wet cake. Water is then added to the recovered wet cake alumina to obtain a slurry with a desired alumina content and CO2 is sparged through the finished slurry. Optionally, hot water saturated with carbon dioxide can be used for the treatment, to extend the stability of the slurry. Peptizing agents can be used as usual.
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