公开(公告)号：US5220111A

公开(公告)日：1993-06-15

申请号：US757361

申请日：1991-09-10

申请人： Donald P. Bucci ,  Francis A. Altemose, II ,  Nancy C. Easterbrook ,  Edwin N. Givens ,  Joseph Klosek ,  Kenneth D. Tracy ,  Kai P. Wong

发明人： Donald P. Bucci ,  Francis A. Altemose, II ,  Nancy C. Easterbrook ,  Edwin N. Givens ,  Joseph Klosek ,  Kenneth D. Tracy ,  Kai P. Wong

IPC分类号： A62D3/00 ,  A62D3/33 ,  A62D3/36 ,  A62D3/38 ,  A62D101/08 ,  A62D101/24 ,  A62D101/43

CPC分类号： A62D3/33 ,  A62D3/38 ,  A62D2101/08 ,  A62D2101/43 ,  A62D2203/04 ,  A62D2203/10 ,  Y10S106/01

摘要： Fly ash generated from incineration of municipal solid waste (MSW) when placed in landfills under mild acid conditions can leach lead and cadmium. A process for stabilizing heavy metals in this fly ash is presented which involves calcining in the presence of an oxygen containing gas stream at a temperature greater than about 375.degree. C. and substantially less than about 800.degree. C. for times from about 170 seconds up to about 5 hours fly ash which has been subjected to lime scrubbing for acid gas removal. Such treated MSW fly ash will give leachates containing heavy metal concentrations less than the EPA regulatory limit.

公开(公告)号：US5220112A

公开(公告)日：1993-06-15

申请号：US757359

申请日：1991-09-10

申请人： Donald P. Bucci ,  Francis A. Altemose, II ,  Nancy C. Easterbrook ,  Edwin N. Givens ,  Joseph Klosek ,  Kenneth D. Tracy ,  Kai P. Wong

发明人： Donald P. Bucci ,  Francis A. Altemose, II ,  Nancy C. Easterbrook ,  Edwin N. Givens ,  Joseph Klosek ,  Kenneth D. Tracy ,  Kai P. Wong

IPC分类号： A62D3/00 ,  A62D3/33 ,  A62D3/36 ,  A62D3/38 ,  A62D101/08 ,  A62D101/22 ,  A62D101/24 ,  A62D101/43 ,  B09B3/00 ,  C04B18/10

CPC分类号： A62D3/33 ,  A62D3/38 ,  B09B3/00 ,  B09B3/0083 ,  C04B18/106 ,  A62D2101/08 ,  A62D2101/22 ,  A62D2101/24 ,  A62D2101/43 ,  A62D2203/04 ,  C04B2111/00784 ,  Y02W30/92 ,  Y10S106/01

摘要： Fly ash generated from incineration of municipal solid waste (MSW) when placed in landfills can under mild acid conditions leach lead and cadmium. A process for stabilizing lead in this fly ash is presented which involves calcining a mixture of the fly ash and certain calcium-containing compounds in the presence of an oxygen containing gas stream at a temperature greater than about 475.degree. C. and substantially less than about 800.degree. C. for times from about 30 minutes up to about 5 hours. Such treated MSW fly ash will give leachates containing lead concentrations less than the EPA regulatory limit.

摘要翻译： 置于垃圾填埋场的城市固体废物（MSW）焚烧产生的飞灰可以在温和的酸性条件下浸出铅和镉。 提出了一种用于在该飞灰中稳定铅的方法，该方法包括在含氧气流存在下，在大于约475℃的温度和基本上小于大约小于约的温度下煅烧飞灰和某些含钙化合物的混合物 800℃，时间约30分钟至约5小时。 这种经过处理的MSW飞灰将产生含铅浓度低于EPA监管极限的浸出液。