Modelling the energy performance of electric arc furnaces in steel making | |
| Author | Gao, Zairong |
| Call Number | AIT Thesis no. ET-93-16 |
| Subject(s) | Steel industry and trade--Energy conservation Furnaces |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ET-93-16 |
| Abstract | Electric arc furnace in st eel making industry is one of the l argest el ect rical energy consumer both in industrialized and developing countries. With the growth in demand of steel products and increase in energy cost, the reduction of energy consumption and increased productivity is an important cons ideration. An energy performance model that combines the e l ectrical characterist ics and thermal charact eristics has been developed to assess the EAF energy performance. The model supplied a methods to search the influence of various e l ectrical parameters and thermal parameters on the energy performance. The mode l can be applied to analysis the energy performance in specified met allurgi cal period and total actua l energy performance, to simulate energy performance under different parameters, and to identify the potential of energy saving and productivity increase. Electrical power input (current and voltage) simulation have been carried out to s how their influence on energy performance for a Chinese case and a Thai case. Cons idering only the melting period, which amounts more than 2/3 of e l ectrical energy consumption and more than ha lf operation time , properly schedul e of electrical power input achieved both energy saving and time saving which i s corr esponding to the product increase. For the Chinese case when highest effic i ency i s expect ed, the annual energy saving i s 233 MWh or 2.5%, and production increase 2,810 tons s teel, equival ent 15% of present annual production . While the shortest heating time achieved, annual energy saving is 75.6 MWh or 0.9%, and annual production increase ar e 4,568 tons or 25% , respectively. For the Thai case, the annual energy saving is 4,476 MWh or 14%, and production increase 8,760 ton s t eel or 13 .5%%, when highest effici ency achieved. While the shortest melting time achieved, annua l energy saving, and annual producti on increase are 2,421 MWh or 7 .5% and 10, 320 ton steel or 16% respectively. If the present operation point is moved from 1=22,700 A to 16,000 A, the heating time keep unchange but energy consumption will reduce 2,022 MWh or 6.3%. During oxidation and deoxidation periods, the required el ectrical energy input relatively small. The operation time are determined by the metallurgi cal operation, the absolute necessary heating time may much l ess than the operation time . The most important cons ideration is to reduce the operation time and to match the operation time and necessary heating time. Any improperly match would l ead significant additional energy consumption and a very l ow actual furnace effi c i ency. |
| Year | 1993 |
| Corresponding Series Added Entry | Asian Institute of Technology Thesis ; no. ET-93-16 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Surapong C. |
| Examination Committee(s) | Bhattacharya, S.C. ;Shrestha, Ham M. |
| Scholarship Donor(s) | The State Education Committee People's Republic of China |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |