In steel plants, we can find a number of rolling mill production lines. They have different functions or can roll different types of steels. However, do you really know about the hot rolling mill production line? Today, Luoyang Judian Metal Hot Processing Equipment Manufacturer will show you something about hot rolling mill production line.
In the metal rolling workshop, the equipment can be divided into main equipment and auxiliary equipment. The main equipment of the rolling mill is generally the main engine row. The main engine column is generally composed of three parts: the motor, the rolling mill, and the transmission devices. The motor mainly provides the power for the rotation of the rolls, usually powered by AC. The function of the rolling mill is to roll the billet to different shapes of steels, consisted of rolls, stands, roll adjustment devices, roll balance positions, and roll bearings. The function of the transmission device is to transmit the power of the motor to the roll.
A rolling mill production line actually consists of several reversible rolling mills and other ancillary equipment.
According to the usage, the rolling mills are divided into two categories: semi-finished rolling mills and finished rolling mills. Semi-finished rolling mills include various blooming mills, continuous billet rolling mills and small and medium-sized rolling mills. Finished mills include section steel mills, steel plate mills, steel tube mills and special purpose mills. The size of semi-finished rolling mill and section steel rolling mill is usually expressed by the nominal diameter of the roll, that is, the pitch circle diameter of the herringbone gear. The size of the steel plate rolling mill is represented by the length of the roll body, and is divided into thick plate, medium plate and thin plate mills according to the thickness of the rolled steel plate. The steel pipe mill is generally expressed by the outer diameter of the steel pipe being rolled.
According to the arrangement form, there are five kinds of rolling mills, single stand rolling mill, horizontal rolling mill, tandem rolling mill, semi-continuous rolling mill, continuous rolling mill.
According to the number of rolls, the rolling mills can be divided into two-roller, three-roller, four-roller, multi-roller, and universal.
At present, the tandem rolling mill is the main equipment of small and medium-sized steel rolling plants. It is mainly used for the production of various types of steel, wire rods, narrow strips, and small rigid billets. Its main features are:
Several stands of a continuous rolling mill are arranged in a row according to the rolling direction. And the steel billet is rolled and deformed in several stands at the same time. The rolling speed of each stand increases according to the length of the billet, and keeps the metal at the second flow in the frame rolling stock is equal or has a slight pile-pull relationship. This type of rolling mill is a modern rolling mill with high productivity. This type of mill is often used in billet mills, hot strip mills, mini mills, wire rod mills and cold strip mills.
The continuous rolling mill has a high degree of mechanization and automation, and the rolling speed of its finished products is also high. For example, the exit speed of the non-twist continuous wire rod rolling mill has reached 130m/s.
Slitting rolling means that in the rolling process, the billet is rolled into two or more parallel parts with the same cross-sectional shape through the pass design. Then the billet is longitudinally divided into two or more sections by the slitting equipment. The rolling process of the same shape is continuous until we got the finished products.
Under the condition of the same billet and product specifications, the number of rolling passes using the split rolling technology is less than the ordinary single rolling pass, which creates conditions for reducing the number of stands, shortening the length of the workshop, and saving workshop investment.
For example, when a steel plant produces rebars (the rolling speed is 14m/s), the output of single-line rolling is 22t/h, but after rolling with double-stripe slitting equipment, the output of the rolling mill is increased to more than 40t/h.
This method provides sufficient room for the selection of billets in the rolling mill, and is conducive to solving the problems of connection and matching between the rolling mill and the continuous casting billet.
According to statistics, the use of split rolling technology in section steel mills, wire rod mills and billet mills can reduce rolling power consumption by 15-30%; reduce billet heating fuel consumption by 1.8%-2%; and reduce roll consumption. The cost of rolling material can be reduced by 10-20%.
Luoyang Judian is a manufacturer of continuous rolling mill production line. If you have any questions about the rolling mill production line, please contact us and we will provide the professional solutions.