Recovery method and recovery apparatus of thallium in cement production facilities
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorMasayoshi Konishi
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Abstract
A method for recovering thallium in a cement production facility according to the present invention includes: a collecting process of collecting dust from combustion gas at a passage of the combustion gas, which is downstream of a gas outlet of a suspension preheater or a gas outlet of a demineralizer of a cement kiln of the cement production facility; a water-cleaning process of producing slurry or a water solution by cleaning the collected dust using water; and a filtering process of separating the slurry or water solution into a solid and a liquid and recovering thallium, wherein thallium is recovered from the combustion gas exhausted from the cement production facility.
Claims3
An apparatus for recovering thallium in a cement production facility, comprising:
- a collecting means for collecting dust from combustion gas at a passage of the combustion gas, which is downstream of a gas outlet of a suspension preheater or a gas outlet of a demineralizer of a cement kiln of the cement production facility,
- a cleaning means for producing slurry or a water solution by cleaning the collected dust using a strong alkaline water solution which is produced by adding sodium hydroxide and/or potassium hydroxide into water, and
- a solid-liquid separating means for separating the slurry or water solution into a solid and a liquid and separating thallium from the slurry or water solution produced by the water-cleaning means,
- wherein thallium is recovered from the combustion gas exhausted from the cement production facility.
Dependencies are inferred from the claim text.