| 摘要 |
<p>An aqueous beneficiated clay slurry (1, 101) is concentrated from a lower solids content to a higher solids content by evaporating water therefrom by passing the aqueous clay slurry (1, 101) through one or more non-contact evaporative heat exchangers (25, 60, 80) in indirect heat exchange relationship with a hot drying fluid (6, 106, 117). The driving fluid, that is the heating medium (6, 106) which is passed in indirect heat exchange relationship with the aqueous clay slurry to initiate the evaporation process, comprises a hot liquid, preferably a moderate temperature hot liquid such as hot water having a temperature ranging from about 120°F to about 200°F.</p> |
