| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.15 ( October 1986 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| New Type Stelmor Equipment of Wire Rod and Bar Mill Yoshiyuki Hanada, Kiyohiro Ueno, Akio Noda, Hidenori Kondoh, Toshio Sakamoto, Kimio Mine |
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Synopsis : When the Stelmor equipment was introduced to the new wire rod and bar mill at Mizushima Works, examination was made for improving the uniform cooling characteristics of the ring-shaped pile of wire rods on the conveyer. From the basic test, it was found that the cooling rate was able to be obtained from the wind velocity distribution, and an optimum wind velocity distribution existed. Also from the test using a simulator, characteristics of the damper and deflector were clarified, and it has become possible to determine the specifications of the nozzle and blower, which can be controlled depending upon requirements for uniform cooling and product quality. The Stelmor unit to which the above-mentioned new functions have been added has features that damper and deflector operations are connected to the process computer and DDCand can be set according to the required quality of wire rods. Through the use of this improved Stelmor equipment, the scatter of tensile strength of wire rods has been reduced from 1.6 to 0.9 kgf/mm2. |
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