Production method for reducing temperature drop of hot-rolled intermediate blank

Abstract

The invention relates to a production method for reducing the temperature drop of a hot-rolled intermediate blank. Whether an R2 rolling mill finishes rolling or not is not checked before a first passand a second pass of steel feeding of an R1 rolling mill, the R1 rolling mill rolls in advance, and the time gap of the R1 rolling mill is 1-3 seconds; the pressure of roller body cooling water in arough rolling area is controlled to be 0.8-1.0 MPa in summer and 0.6-0.8 MPa in winter; in the rough rolling process, the temperature difference between the middle and the edge of the plate blank is controlled to be 20-30 DEG C; water spray on the inlet side and the outlet side of the rolling mill is changed to air spray, and the temperature difference of the cross section is controlled to be within 20 DEG C; and the abrasive width of a resin strip of a water cutting plate of the rolling mill does not exceed 20 mm. The production method has advantages that the plate blank discharging temperature is reduced, the energy consumption is saved, the cost is reduced, and the rolling stability of a machine frame and the next process is improved.

Description

technical field [0001] The invention belongs to the field of hot-rolling technology, and in particular relates to a production method for reducing the temperature drop of a hot-rolled intermediate slab. Background technique [0002] At present, the temperature drop in the rough rolling area of ​​Anshan Iron and Steel's 1580 production line is relatively large, which directly causes the slab to be released from the furnace at a higher temperature, prolongs the time in the furnace, increases gas consumption, and increases costs. The large temperature drop in the rough rolling area is mainly caused by the long rolling time, the large amount of side spray water and cooling water, and the serious water leakage in the frame. The main factor for the normal production of the line. Therefore, in order to reduce the temperature drop in the rough rolling area, reduce energy consumption, and improve the rolling stability of the finish rolling, it is of great significance to develop a p...

AI Technical Summary

Problems solved by technology

[0002] At present, the temperature drop in the rough rolling area of ​​Anshan Iron and Steel's 1580 production line is relatively large, which directly causes the slab to be released from the furnace at a higher temperature, prolongs the time in the furnace, increases gas consumption, and increases costs.