High-Speed Wire Rod Mill Production Line Process Flow

High-speed Wire Rod Mill Production Line Process Flow

Billet preparation: 150 mm *150 mm *14 000 mm continuous casting billet.

Reheating furnace: The billet is heated to austenite temperature to facilitate rolling. 

High-pressure water descaling: After the billet is heated in the reheating furnace, before entering the roughing rolling mill, it is necessary to descaling with high-pressure water to remove the oxide scale and secondary oxide scale on the billet surface, so as to avoid defects on the pressed surface. 

Roughing mill, medium rolling mill, and finishing rolling mill rolling: the size of finished products, including 6 roughing rolling mills, 6 medium rolling mills, 4 pre-finishing mills, 10 finishing mills, a total of 26 rolling mills on this high-speed wire rod mill production line.

Flying shear head and tail: Before entering each set of rolling mills, the work of cutting head and tail must be carried out in order to remove the head with too low temperature to avoid damage to the roll surface and prevent the head of the rolling piece from being stuck in the inter-stand guide device. The stuck shear is used to crush and break the rolling event before the medium rolling mill, the pre-finishing mill and the finishing mill in the accident state.

Water cooling: In order to reduce the rolling temperature entering the finishing mill, a water tank is set before the finishing mill to control the finishing temperature. 

Rolling: Rolled wires are rolled into rolls after cooling through water, forming loose rolls through spinning.

Stelmore uncoiled cooling: The cooling speed of the controlled cooling line is controlled according to different steel grades and product uses, so as to obtain the corresponding product quality. 

Finishing and transportation: including coiling, dressing, inspection, sampling, baling and rolling, weighing and hanging tags, using the coiling device to collect loose rolls, and hanging them on the C-hook on the P-S transport line, completing the process of coiling, dressing, inspection, sampling, baling and rolling, weighing and hanging tags in turn, and then unloading and entering the warehouse.

Since 1989 Hani Tech has been always involved in design, engineering, manufacturing and installation of complete hot rolling mill plant for long products (re-bars, SBQ bars, wire rod, small and medium sections), as well as revamping and upgrading of existing plants. 

Hani Tech is the one-stop manufacturer & supplier able to design, manufacture, install and commission your hot rolling mill plant from A to Z.

Please contact stella@hanrm.com for a quotation.
And free send inquiry to us.
Email: stella@hanrm.com   stellarollingmill@gmail.com
Whatsapp/Wechat:+8615877652925

Common Problems and Solutions of Laying Head in High-speed Wire Rod Rolling Mill Producing Process

Common Problems and Solutions of Laying Head in High-speed Wire Rod Rolling Mill Producing Process

1. Laying Head Tail Flicking

Laying head tail flicking refers to the phenomenon that the tail of the wire rod can not spit out smoothly from the laying head tube and collide with the laying head disk with high-speed rotation. 

The reason is that the tail of the wire rod coil does not have enough speed and force to make the tail of the coil throw out smoothly from the laying head tube. The solution is to prolong the clamping time at the tail of the pinch roll and appropriately improve the clamping speed. 

Another is to change the throwing angle of the outlet section of the laying head tube to reduce the resistance during throwing, so that the tail of the coil can be thrown smoothly.

2. Laying Head Spit Large and Small Circles

spit large and small circles refers to the different diameters of the coils spit out by the wire rod mill laying head, which is mainly due to the unstable tension between the pinch roll and the wire rod mill laying head. 

The solution should start from two aspects: First, maintain the stable clamping of pinch roll. When the clamping state is poor, the speed of the pinch roll is not constant. Second, the laying head pipe may wear out a deep track and should be replaced in time.

3. The Wire Rod Coil of Wire Rod Mill Laying Head is Oval

When producing small-size wire rod and the spinning temperature is too high, it is easy to appear circle oval phenomenon, because the wire rod is relatively soft. 

In addition, when the height of the air-cooled roller table is too low and the falling distance of the coil discharged by the spinning machine is too large, it is also easy to appear elliptical. 

At this time, the turning plate at the outlet of the laying head can be adjusted and its inclination angle can be appropriately reduced. The coil discharged by the wire rod laying head falls on the turning plate slowly first, and then on the roller table. 

In this way, it can ensure that the wire rod coil shape falls evenly in the center of the roller table, and it is not easy to produce an elliptical ring shape.

Please contact stella@hanrm.com for a quotation.
And free send inquiry to us.
Email: stella@hanrm.com   stellarollingmill@gmail.com
Whatsapp/Wechat:+8615877652925