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Show 6 3. 4. 3 Energy saving Tab. 8 shows the amount of energy that has been saved by using the Oxygen Jet Burner. Although the amount of COG and Oxygen used increased, the energy consumption of the furnace was reduced by 9%. Tab.8 The amount of energy that has been saved by using the Oxygen Jet Burner Electricity COG 02 Total ©Conventional burner 4, 289MJA (418KWh/tX10. 26MJ/KWh) 50MJA (2.6Nm7tX19. 26MJ/Nm!) 73MJA (11.2NmVtX6.49MJ/Nm:,) 4,412MJ/t ©Oxygen Jet Burner 3, 704MJA (361KWh/tX10. 26MJ/KWh) 183MJA (9. 5NmVtxi9. 26MJ/Nm:<) 117MJA (18. 0Nm7tX6. 49MJ/Nm') 4,004MJ/t Difference ©-® -585MJA (-57KWh/t) + 133MJA +44MJ/t -408MJA (-9%) 3. 4. 4 Durability of burner Since the conventional burner tended to get blocked from splashed molten steel, the conventional burner was not effectively utilizable. With this new type of burner, there has been no blockage at the nozzle, thus the new burner can be used continuously. 4. Conclusion Sumitomo metals developed an Oxygen Jet Burner and Oxygen enrichment Burner in order to quickly clean metal and slag stuck to the surface of a converter, a ladle, a torpedo , a RH degasser and other devices. With the new type of burner, high speed melting and cutting of metal and slag has been achieved. The developed Oxygen Jet Burner was installed on the 80ton AC Electric arc furnace. As a result, compared with the conventional burner operation, processing time was reduced by ll%(10min) and energy consumption was reduced by 9%(electricity 57KWh/t), In addition, the new burner is more durable, requiring less maintenance. References l.T. Kimura et al:Current Advances in Materials and Processes, 8(1995), p999 2. H. Ikenaga et al:Current Advances in Materials and Processes, 3(1990), pl880 3. M. Fujiwara, M. Kaminaka et al:Current Advances in Materials and Processes, 9(1996),p681 |