Production line capable of replacing conventional hot continuous rolling production line of wide strip steel and rolling process

Abstract

The invention discloses a production line capable of replacing a conventional hot continuous rolling production line of wide strip steel. The production line comprises a furnace area device, a rough rolling area device, a shearing area device, a steekle mill area device and a coiling area device which are successively arranged and sequentially connected. The production line can be used for completing a rolling process by using only four rolling mills; the rolling process can be completed by the conventional hot continuous rolling production line of the wide strip steel by using at least eight or nine rolling mills. According to a processing process using the production line capable of replacing the conventional hot continuous rolling production line of the wide strip steel, the yearly output is basically consistent with that of the conventional hot continuous rolling processing process; the produced steel type range is wide; the thickness of products is generally 1.5-25.4mm. Compared with a laminar cooling device of the conventional hot continuous rolling of the wide strip steel, the length is reduced by 50%; compared with the conventional hot continuous rolling of the wide strip steel, the length of a whole output roller channel is shortened by 1 / 3, so that the total length of the production line is shortened; the total weight of equipment is reduced; the power and energy consumption of a motor are small; the cost of normal operation and maintenance of the equipment is reduced; the oxidation time of the strip steel in a coiling furnace is shortened, so that the surface quality and the yield of the strip steel are improved.

Description

technical field [0001] The invention relates to a production process of continuous hot rolling of iron and steel and nonferrous metallurgy. Background technique [0002] The layout of the traditional hot rolling production line is divided into full continuous, 3 / 4 continuous and semi-continuous. Considering factors such as production efficiency, energy saving, increase The layout type is mostly semi-continuous. The rough rolling area is composed of 1 or 2 reversible rough rolling mills, and the finishing rolling area is composed of 6 to 8 irreversible finishing mills. The process flow of the production line is generally: Qualified non-defective slab→heating→high-pressure water rough descaling→rough mill reversible rolling→hot coil box→flying shear→high-pressure water fine descaling→finishing mill continuous rolling→strip cooling→ Undercoiler, which produces a wide range of steel types, the thickness of the product is generally 1.5-25.4mm, the annual output is high, the surf...

AI Technical Summary

Problems solved by technology

The total weight of the production line equipment is very heavy and the total power of the transmission motor is very large, resulting in a large investment, floor area and energy consumption

There are many unfavorable factors such as high repair and maintenance costs for normal production of the production line, large consumption of energy media such as water, electricity, wind and gas, many public and auxiliary facilities, and many production line staffing

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