| 摘要 |
<p>Alkali metal compounds are recovered from the alkali-rich dust obtained from a cement kilning plant operating with exhaust gas temperatures of from 100-300 DEG C., the dust being subjected to a wet treatment to form a solution of alkali metal hydroxides and possibly carbonates, the solution is then evaporated utilizing waste heat from the kilning process, e.g. the air from the clinker cooling equipment. Specification 946,872 is referred to.</p> |
