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Method of recovering thallium at cement manufacturing facility, and recovery apparatus

A technology for manufacturing equipment and recycling methods, applied in lighting and heating equipment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as increased costs and increased processes, and achieve the effect of reducing manufacturing costs

Active Publication Date: 2013-07-24
SUMITOMO OSAKA CEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the process increases and the cost required for thallium recovery increases.

Method used

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  • Method of recovering thallium at cement manufacturing facility, and recovery apparatus
  • Method of recovering thallium at cement manufacturing facility, and recovery apparatus

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Experimental program
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Embodiment

[0091] Hereinafter, the method for recovering thallium in cement manufacturing equipment according to the present invention will be specifically described by way of examples. However, the present invention is not limited by the following examples unless the gist is exceeded.

[0092] As the dust used in this embodiment, the following three types of dust were used: the stabilizer 5 collected from the combustion gas discharged from the uppermost cyclone decomposer 1d of the suspension preheater 1 of the cement manufacturing facility Stabi-dust; EP dust collected from the above combustion gas by the electric dust collector 6 ; bag filter dust collected from the above combustion gas by the bag filter 7 .

[0093] Table 1 shows the content of thallium (Tl) in these dusts.

[0094] In addition, stabilizer dust refers to dust collected in a stabilizer (humidity control tower).

[0095] [Table 1]

[0096]

[0097] Generally, thallium of about several hundred to several tho...

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PUM

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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.

Description

[0001] Cross References to Related Applications [0002] This application claims priority based on Japanese Patent Application No. 2008-057850 for which it applied to Japan on March 7, 2008, and uses the content for this specification. technical field [0003] The present invention relates to a method and device for recovering thallium in cement manufacturing equipment, and more specifically, to a method capable of recovering with high purity as a useful metal contained in combustion gas discharged from cement manufacturing equipment A method and a device for recovering thallium in cement manufacturing equipment of thallium (Tl). Background technique [0004] In recent years, due to the increasing awareness of the protection of the global environment, effective utilization of industrial waste is also being carried out in cement manufacturing facilities. [0005] Since this industrial waste contains volatile components such as chlorine, it needs to be eliminated by a desalin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B61/00B09B3/00C01G15/00C02F1/461C22B7/02C04B7/60
CPCC22B7/006C22B3/20C04B7/364C04B7/436C22B7/02C22B7/008C22B61/00C01G15/00F27B7/2025F27B7/2033F27D17/008Y02P10/20
Inventor 小西正芳
Owner SUMITOMO OSAKA CEMENT CO LTD