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Ultra-thin hot rolled strip 0.6 millimeters produced on Primetals Technologies Arvedi ESP line - The 20th China (Guangzhou) Int’l Plate metal, Bar, wire, Metal Processing &Setting Equipment Exhibition
1/16/2019 金屬板材展-棒材-線材展 -plate metal expo-wire expo |
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In October 2018, an Arvedi ESP (Endless Strip Production) line installed in a plant belonging to the Chinese steel producer Rizhao Steel Group Co Ltd produced ultra-thin hot strip with a thickness of just 0.6 millimeters for the very first time. Hot strip as thin as this had never before been achieved anywhere in the world. This thin strip can cover more than 80 percent of regular commercial cold-rolled thicknesses. This widens Rizhao''s range of products, especially for cold strip substitutes. After the line entered service in April, success was achieved just six months later.
Following on from 10 years of continued development of the endless concept, this latest production record was achieved during a test in which eight coils were produced with strip thicknesses of less than 0.8 millimeters. This production sequence involved first progressively reducing the strip thickness to 0.75, 0.7 and finally 0.6 millimeters, before continuing the sequence with increasing thicknesses. ESP mills are guaranteed to produce strip thicknesses of 0.8 millimeters, which are used industrially and traded on the market for direct applications. Whereas a strip thickness of 0.8 millimeters covers around 50 percent of cold-rolled thicknesses, a strip thickness of 0.6 millimeters can cover more than 80 percent of cold-rolled thicknesses. Conventional hot strip production has a lower thickness limit of 1.8 millimeters, or 1.2 millimeters for special processes.
This success was made possible by the familiar properties of the ESP process, such as an extremely high process stability accompanied by constant speeds and temperatures. At the same time, advances were made in technologies that, in their original form, had only been used in cold rolling mills for high-quality products, the process being controlled by "ultra-thin rolling technology" based on the control concepts applied in cold rolling technology.
The Arvedi ESP system produces hot strip directly from liquid steel in a continuous, uninterrupted production process in a linked casting and rolling mill. Mills of this type have an energy consumption and associated costs up to 45 percent lower than those of conventional mills with separate casting and rolling processes. They also have substantially reduced CO2 emissions. Furthermore, the dimensions of these mills, with a length of only 155 meters, are considerably more compact than those of conventional casting and rolling mills. The casting and rolling line is controlled by standardized, integrated basic (level 1) and process (level 2) automation, which ensures finely coordinated interaction of the casting and rolling processes.
金屬板材展-線材展-金屬加工展-2019第二十屆廣州國際金屬板材展—全球三大金屬展之一巨浪展覽
-- The 20th China (Guangzhou) Int’l Plate
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