公开(公告)号：US20180015514A1

公开(公告)日：2018-01-18

申请号：US15553463

申请日：2015-02-26

申请人： MICROPULVA LTD OY

发明人： Risto MANNONEN ,  Jouko NIEMI

IPC分类号： B09B3/00 ,  C04B7/12 ,  B03B5/28 ,  C04B7/42 ,  C04B7/60 ,  C10L5/44

CPC分类号： B09B3/00 ,  B03B5/28 ,  B03D1/02 ,  B09B2220/06 ,  C04B7/12 ,  C04B7/427 ,  C04B7/60 ,  C04B18/06 ,  C10L5/447 ,  C10L2290/54 ,  Y02W30/92 ,  C04B20/023

摘要： A method for industrial refining of coal ash created in power plants and carbonaceous ashes produced in other combustion processes by separating coal from said ashes and returning it to use and by recovering a substantially coal-free ash fraction obtained in the refining. In the method, coal ash and at least one ash fraction created by gasification technique in combustion plants are carefully proportioned in relation to one another and formed into a slurry mixture by means of an efficient dispersion technique, the slurry being then led to a flotation step, where a fraction rich in coal and a siliceous fraction poor in coal and a fraction dissolving in the process water are separated by flotation. The coal ash is arranged to have the highest proportion in the mixture to be taken to flotation, the ashes from combustion plants being dosed into said mixture in an amount that does not cause the maximum amounts of harmful substances to be exceeded in the qualities of the carbonaceous product and the silicate product poor in coal to be obtained.