公开(公告)号：EP1095235A2

公开(公告)日：2001-05-02

申请号：EP99923514.6

申请日：1999-05-04

申请人： FEUSTEL, Hans, Ulrich ,  MALLON, Joachim ,  SCHAAF, Michael ,  Scheidig, Klaus

发明人： FEUSTEL, Hans, Ulrich ,  MALLON, Joachim ,  SCHAAF, Michael ,  Scheidig, Klaus

IPC分类号： F27B1/16

CPC分类号： F27B1/16 ,  F27B1/08

摘要： The invention relates to an additional embodiment for the arrangement of a lower annular suction and gas relaxation chamber (12) on a coke-heated circulating gas cupola furnace for material and/or energetic recycling of waste materials having different composition as described in main patent P 196 40 497, in which suctioning of gaseous organic matter which has been completely broken down into its basic components CO, H2, H2O and CO2 and into its trace components or has been already reformed is not yet reliably prevented. According to the invention, the lower annular suctioning and gas relaxation chamber (12) is arranged below the melting and overheating zone which extends up to the plane formed by the position of the jet gas compressor (24). Said arrangement makes it possible to draw off the excess gas directly from the furnace shaft from the melting and overheating zone at high temperatures of around 2,000 °C. The excess gas is also guided through the burning coke layer of the melting and overheating zone of the coke-heated circulating gas cupola furnace. CO2 is converted to CO by lowering the temperature of the gas as a result of energy-consuming Boudard equilibrium reaction. Fluidic separation of the excess gas from process gas is simultaneously carried out.

公开(公告)号：EP0680592B1

公开(公告)日：1997-08-20

申请号：EP94905072.8

申请日：1994-01-18

申请人： FEUSTEL, Hans, Ulrich ,  MALLON, Joachim ,  SCHAAF, Michael

发明人： FEUSTEL, Hans Ulrich ,  MALLON, Joachim ,  SCHAAF, Michael ,  WILMS, Edmund ,  NEUMANN, Gerhard ,  KÖHLER, Karl-Heinz ,  RUSCHITZKA, Ludwig

IPC分类号： F27B1/16 ,  C21B11/02

CPC分类号： C21B11/02 ,  F27B1/16 ,  Y02P10/136 ,  Y02P10/216

摘要： A process characterized by low melting costs and a reduced environmental impact is disclosed, as well as an easy-to-operate device for melting iron metallurgy materials, in particular steel scrap, in a coke-fired cupola for producing cast iron. According to the process, gas is partially drawn from the furnace at a temperature above 400 °C in the pre-heating zone and is supplied once again to the melting and overheating zone at the same time with more than 23 % oxygen. Another characteristic trait of the invention is that the partial amount of gas drawn from the furnace equals up to 70 % of the furnace gases produced during the melting process. The furnace gas supplied, in particular because of its CO content, ensures a supply of gaseous fuel which is burned with the oxygen. The reducing conditions in gas-heated cupolas are thus reinforced, in turn improving the metallurgical effects.

公开(公告)号：EP0680592A1

公开(公告)日：1995-11-08

申请号：EP94905072.0

申请日：1994-01-18

申请人： FEUSTEL, Hans, Ulrich ,  MALLON, Joachim ,  SCHAAF, Michael

发明人： FEUSTEL, Hans Ulrich ,  MALLON, Joachim ,  SCHAAF, Michael ,  WILMS, Edmund ,  NEUMANN, Gerhard ,  KÖHLER, Karl-Heinz ,  RUSCHITZKA, Ludwig

IPC分类号： C21B11 ,  F27B1

CPC分类号： C21B11/02 ,  F27B1/16 ,  Y02P10/136 ,  Y02P10/216

摘要： A process characterized by low melting costs and a reduced environmental impact is disclosed, as well as an easy-to-operate device for melting iron metallurgy materials, in particular steel scrap, in a coke-fired cupola for producing cast iron. According to the process, gas is partially drawn from the furnace at a temperature above 400 DEG C in the pre-heating zone and is supplied once again to the melting and overheating zone at the same time with more than 23 % oxygen. Another characteristic trait of the invention is that the partial amount of gas drawn from the furnace equals up to 70 % of the furnace gases produced during the melting process. The furnace gas supplied, in particular because of its CO content, ensures a supply of gaseous fuel which is burned with the oxygen. The reducing conditions in gas-heated cupolas are thus reinforced, in turn improving the metallurgical effects.