What Are The Characteristics Of Continuous Rolling Mills For Bar Rolling Process?

At present, China still has a small number of horizontal mini-rolling mills, there are also a few semi-continuous mini-rolling mills, but the vast majority are continuous mini-rolling mills.

The characteristics of continuous rolling mills are.

(1) continuous casting billet as raw material, a fire rolled into, low production costs.

(2) continuous casting and heating furnace compact arrangement, continuous casting billet hot feed hot installation, energy saving up to 30%-45%.

continuous rolling mill

(3) Step heating furnace heating, uniform heating, high degree of automation.

(4)High-pressure water descaling device after the furnace, which improves the surface quality.

(5)The rolling line with 18 stands arranged alternately in flat/stand, and the whole line adopts torsionless rolling, with less production accidents and high efficiency.

(6) The mill adopts short stress line mill, high mill stiffness, easy operation of symmetrical adjustment of roll slit, overall replacement of the stand, roll hole type and guide between the rolls to adjust, less online adjustment.

(7) The main drive of the rolling line adopts DC drive or AC speed regulation drive to achieve stepless speed regulation of the rolling line speed.

(8) The use of slitting rolling process to produce steel bars.

(9) The use of stepper type cold bed, high cooling efficiency, good cooling quality.

As the rolling process in the continuous rolling more than 6 passes later it is easy to produce splits, fish tail and other factors that are not conducive to rolling mill rolling, otherwise it is easy to card entrance guide, not easy to bite into and card exit guide position caused by the occurrence of rolling accidents. In order to avoid the occurrence of rolling accidents general rolling line after each 6 mills to set a flying shear used to cut the head, cut the tail as well as accidents when breaking the mill to prevent further expansion of the accident.

Small and medium alloy steel bar rolling line is generally set up after the roughing unit off-head area, so the mill layout process to consider the layout of the off-head area. Continuous rolling off-head area is set up mainly to ensure that the continuous rolling mill bite into the speed and finishing rolling out speed.

flying shear

In order to ensure product size accuracy between the small bar finishing units need to set a certain number of live sleeve to ensure tension-free free rolling, in the layout of the mill should also consider the layout of the live sleeve. In order to ensure product quality and avoid torsional rolling mills are generally arranged in alternating vertical / flat or flat / vertical.


Post time: Oct-10-2022