| 摘要 |
PURPOSE:To make use of the heat retained in a strip after hot rolling and to economize the consumption of driving power for cold rolling by subjecting said strip in a high temp. state to mechanical descaling then cooling the same to a proper temp. and cold rolling the cooled strip. CONSTITUTION:A strip which is uncoiled from a hot rolled coil 1 of a high temp. is passed through a rolling mill 2 of light rolling down to fine coil break and is then conducted to a mechanical descaling device 3, where the strip is descaled by blasting of a slurry contg. sand iron in the state of the high temp. The strip is conducted into a temp. controller 4 where the strip is cooled down to the temp. optimum for cold rolling and is then passed through a cold rolling mill 5. The temp. of the strip to be passed through the mill 5 is selected within the temp. range of about 50-250 deg.C and at the temp. at which the rolling load is least according to the steel kind of the strip. The heat is recovered through the salt bath or rolling mill oil or the like used in said controller 3, whereby the energy is economized additionally. |
