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

Wire and Bar Rolling Mill & Reducing and Sizing Mill

Wire and Bar Rolling Mill & Reducing and Sizing Mill

For a long time, the output of bar and wire rod in China has been between 40% and 50% of the total output of iron and steel products. In recent years, the total output of bar and wire rod has exceeded 400 million tons. Except for about 10% of exports, the rest of the output is used for domestic digestion. It can be seen that bar and wire rod products play a very important role in national economic construction. There are more than 1000 production lines in China. 

Since the 1980s and 1990s, China has introduced foreign advanced bar and wire rolling mill one after another. By digesting, transforming and upgrading this technical line, China's domestic bar and wire rolling mill equipment have approached the world's advanced level. With 12% of the imported international advanced level production lines, at present, it is above the domestic advanced level. Some of them accounted for about 75% and became the mainstream of the market. Another 20% of the ordinary rolling mills adopt the twist rolling process with large output, which is only suitable for the production of ordinary carbon steel. There are still 5% backward mills to be eliminated.

After more than 30 years of development, the types of bar mills can be classified into three categories: closed two-high mill, short stress path mill and cantilever roll ring mill. Among them, the closed two-high mill is mainly Morgan type and Simac type (including Demark type). Through introduction and digestion, Morgan type closed mill has been successfully applied to hundreds of domestic production lines. The main imported models of short stress path rolling mill are Danieli type and Premini type. Our major research institutes have developed their own brand of short stress path rolling mill, which has been applied in hundreds of bar and wire production lines in China. Cantilever roll ring mill is only developed by Danieli, but it is seldom imported in China, such as Laigang and Tangshan Iron and Steel Company, which is only used in roughing mill.

Bar reducing and sizing mill is a kind of mill installed in bar finishing mill to improve product size accuracy and product performance (rolling by controlling temperature). It is mainly used for a bar of special steel. Reduced sizing mill is different from common mill in three aspects: first, using clutch with speed ratio to meet the needs of different rolling speeds of all products; second, using minimum mill center distance to reduce the size impact of micro-tension rolling; third, using single pass carbide roll ring, roll as double support. Support to ensure sufficient stiffness to meet a wide range of product specifications. At present, there are two types of imported machines in China: two-high mill and three-high Y mill. The two-roll mill is mainly of the predominant type and the Danieli type. There are three-stand flat-vertical arrangement and a four-stand flat-vertical arrangement. The roll system of the mill adopts the frame structure of the short stress line mill with high stiffness. Three-roll Y mill is mainly KOCKS type and Simac type. It usually consists of 3-5 stands. Roll passes are arranged alternately by Y-Δ. 

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

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