| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.2 ( March 1981 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Energy Saving Techniques of Kawasaki Steel
Shigeru Kobayashi |
| Synopsis : Among some remarkable progresses made in energy saving techniques in Japan since the Oil Crisis, Kawasaki Steel has achieved more than 14% energy saving in the last five years. This noticeable result was achieved mainly by reduced energy input which itself was attained by a more efficient use of energy combined with a recovery and recycling of exhaust energy in the form of the heating of air, gas, solid materials, supported by the accumulation of some small yet significant energy-saving operational improvements and recovery of exhaust energy in the form of electric power and steam. Major energy saving techniques developed by Kawasaki relate to BF top gas pressure recovery turbine generator, coke dry quenching (CDQ), increased BOF gas energy recovery ratio, higher continuous casting ratio, a slab cooling boiler, and reduced specific-fuel consumption cost in the reheating furnace operation. At present, Kawasaki is developing heat recovery techniques, such as of sensible heat of sintered ore and BF slag. In future, a higher efficiency in energy use must be achieved in each production process as a fundamental measure for energy saving, while an inter-process energy loss will be minimized, with higher recovery ratio attained of exhaust energy. |
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