Latest products
Introduction to the use of rough rolling mill for packaging steel strip
by：Hongmei
2021-03-15
Introduction to the use of rough rolling mill for packaging steel strip
（1）Equipment
There is an iron scale cladding machine at the front of the roughing mill. Its function is to remove a thick layer of primary iron scale produced on the slab sent from the heating furnace. It uses a small reduction rolling method to make The iron oxide scale cracks, and then use high-pressure water (100-150 kg/cm2) to remove it. The iron oxide scale crusher has horizontal and vertical forms. Recently, most of the latter are used.
The rough rolling mill has continuous and reversible forms. The slab passing through 4-6 rough rolling mills in one direction is continuous. In this case, it is usually driven by a synchronous motor, and a slab cannot be continuously rolled on two rolling mills at the same time. The reversible type is to roll 3-7 passes back and forth on a rolling mill. Because the rolling mill is required to reverse and change speed, it is driven by a DC motor.
(2) Operation
Rough rolling is followed after descaling. The descaled slab is rolled by horizontal rolls, vertical rolls, descaling devices, etc. on the roughing mill according to the determined thickness, width and expected plate shape, temperature, and surface properties.
The rough rolling sequence degree is determined according to the thickness of the finished product, the capacity balance of the rough rolling mill and the finishing mill, the yield rate, and the operating conditions.
（1）Equipment
There is an iron scale cladding machine at the front of the roughing mill. Its function is to remove a thick layer of primary iron scale produced on the slab sent from the heating furnace. It uses a small reduction rolling method to make The iron oxide scale cracks, and then use high-pressure water (100-150 kg/cm2) to remove it. The iron oxide scale crusher has horizontal and vertical forms. Recently, most of the latter are used.
The rough rolling mill has continuous and reversible forms. The slab passing through 4-6 rough rolling mills in one direction is continuous. In this case, it is usually driven by a synchronous motor, and a slab cannot be continuously rolled on two rolling mills at the same time. The reversible type is to roll 3-7 passes back and forth on a rolling mill. Because the rolling mill is required to reverse and change speed, it is driven by a DC motor.
(2) Operation
Rough rolling is followed after descaling. The descaled slab is rolled by horizontal rolls, vertical rolls, descaling devices, etc. on the roughing mill according to the determined thickness, width and expected plate shape, temperature, and surface properties.
The rough rolling sequence degree is determined according to the thickness of the finished product, the capacity balance of the rough rolling mill and the finishing mill, the yield rate, and the operating conditions.
