A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR RECOVERING VALUABLE METALS IN VALUABLE METAL-CONTAINING WASTES
To provide a method of efficiently recovering valuable metals from valuable metal-containing wastes.SOLUTION: A recovery method of valuable metals in valuable metal-containing wastes includes: (1) a pulverization step including a (step A) wherein a blend containing valuable metal-containing wastes and at least one or more kinds of cement raw materials selected from limestone, silica sand, clays, and slags is pulverized by using a roller mill, then separated into a mill refined flour and a mill expulsion and a (step B) wherein 100 pts.mass of the blend and 10-100 pts.mass of the mill expulsion are pulverized by using a roller mill and separated into a mill refined flour and a mill expulsion, then the mill expulsion is subjected to magnetic force screening to separate it into magnetically attractable substances and non-magnetically attractable substances, and the non-magnetically attractable substances are returned to the roller mill for pulverization and separating treatment, the (step B) being repeatedly performed for a prescribed time; and (2) a circulation step wherein the mill expulsion discharged after the prescribed time in the step B is pulverized by using a roller mill to separate it into mill refined flour and a mill expulsion, then the mill expulsion is pulverized by using the roller mill to separate it into mill refined flour and a mill expulsion, the circulation step being conducted repeatedly for a prescribed time.SELECTED DRAWING: Figure 1
【課題】有価金属含有廃棄物から有価金属を効率よく回収する方法を提供する。【解決手段】（１）（工程Ａ）有価金属含有廃棄物と、石灰石、珪石、粘土類及び鉱さいから選択される１以上のセメント原料とを含む混合物をローラーミルで粉砕してミル精粉とミル排石とに分離する工程、及び（工程Ｂ）前記混合物１００質量部と１０～１００質量部の前記ミル排石とをローラーミルで粉砕してミル精粉とミル排石とに分離し、ミル排石を磁力選別して磁着物と非磁着物とに分離した後、非磁着物を前記ローラーミルに戻して粉砕・分離する処理を所定時間繰り返し行う工程を含む、粉砕工程と、（２）工程Ｂで所定時間後に排出されたミル排石をローラーミルで粉砕してミル精粉とミル排石とに分離した後、ミル排石を前記ローラーミルで粉砕してミル精粉とミル排石とに分離する処理を所定時間繰り返し行う循環工程を含む、有価金属含有廃棄物中の有価金属の回収方法。【選択図】図１
METHOD FOR RECOVERING VALUABLE METALS IN VALUABLE METAL-CONTAINING WASTES
To provide a method of efficiently recovering valuable metals from valuable metal-containing wastes.SOLUTION: A recovery method of valuable metals in valuable metal-containing wastes includes: (1) a pulverization step including a (step A) wherein a blend containing valuable metal-containing wastes and at least one or more kinds of cement raw materials selected from limestone, silica sand, clays, and slags is pulverized by using a roller mill, then separated into a mill refined flour and a mill expulsion and a (step B) wherein 100 pts.mass of the blend and 10-100 pts.mass of the mill expulsion are pulverized by using a roller mill and separated into a mill refined flour and a mill expulsion, then the mill expulsion is subjected to magnetic force screening to separate it into magnetically attractable substances and non-magnetically attractable substances, and the non-magnetically attractable substances are returned to the roller mill for pulverization and separating treatment, the (step B) being repeatedly performed for a prescribed time; and (2) a circulation step wherein the mill expulsion discharged after the prescribed time in the step B is pulverized by using a roller mill to separate it into mill refined flour and a mill expulsion, then the mill expulsion is pulverized by using the roller mill to separate it into mill refined flour and a mill expulsion, the circulation step being conducted repeatedly for a prescribed time.SELECTED DRAWING: Figure 1
【課題】有価金属含有廃棄物から有価金属を効率よく回収する方法を提供する。【解決手段】（１）（工程Ａ）有価金属含有廃棄物と、石灰石、珪石、粘土類及び鉱さいから選択される１以上のセメント原料とを含む混合物をローラーミルで粉砕してミル精粉とミル排石とに分離する工程、及び（工程Ｂ）前記混合物１００質量部と１０～１００質量部の前記ミル排石とをローラーミルで粉砕してミル精粉とミル排石とに分離し、ミル排石を磁力選別して磁着物と非磁着物とに分離した後、非磁着物を前記ローラーミルに戻して粉砕・分離する処理を所定時間繰り返し行う工程を含む、粉砕工程と、（２）工程Ｂで所定時間後に排出されたミル排石をローラーミルで粉砕してミル精粉とミル排石とに分離した後、ミル排石を前記ローラーミルで粉砕してミル精粉とミル排石とに分離する処理を所定時間繰り返し行う循環工程を含む、有価金属含有廃棄物中の有価金属の回収方法。【選択図】図１
METHOD FOR RECOVERING VALUABLE METALS IN VALUABLE METAL-CONTAINING WASTES
有価金属含有廃棄物中の有価金属の回収方法
TAKEMOTO TOMONORI (author) / SANO HIROKI (author) / MEIDO TAKESHI (author)
2024-07-19
Patent
Electronic Resource
Japanese
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