Recently, the first domestically produced Laigang 1500mm hot-rolled strip production line, which was built by China Metallurgical Huatian, was officially completed and put into production, producing high-quality hot-rolled strip coils. Its smooth production indicates that China has reached the international level in the field of design and manufacture of hot-rolled strip mills.
Laiwu Steel's 1500mm hot-rolled strip project is a key project of the “10th Five-Year†technical transformation of Laiwu Iron and Steel Group Co., Ltd. It is a large-scale rolling steel project that is fully undertaken by domestic companies for the whole line design, manufacturing, installation and commissioning and technical responsibility. The steel rolling process design and factory design is China Metallurgical Huatian Engineering Technology Co., Ltd. The whole line of machine, electric and hydraulic equipment is contracted by Dalian Heavy Industry-Hangzhong Group Co., Ltd., and the automation control is controlled by Dazhong Electric Control Factory and Beijing University of Science and Technology. And Tianjin Electric Transmission Research Institute jointly subcontracted.
The project broke ground on May 6, 2004, with a total investment of more than 1 billion yuan, annual production capacity of 2 million tons, total installed capacity of 105,700 kilowatts, product width of 800-1400 mm, product thickness of 1.2-20 mm, mainly producing carbon. Plain structural steel, high quality carbon structural steel, low alloy high strength structural steel, pipeline steel hot rolled coil. The product has the remarkable features of wide application range, high finished product rate and low processing cost.
The project adopts a semi-continuous production process with a hot coiling machine consisting of an E1 vertical rolling mill and an R1 four-roll reversing rolling mill. The intermediate billet is taken up by a hot coiling box or directly passed through. The finishing mill is E2. Vertical rolling mill and F1-F6 six four-high rolling mills, the finishing mill adopts constant speed rolling, and the core parts such as heating furnace, hot coil box and three electric control digest and absorb the leading technology of Germany, France and Canada. This set of production process equipment is mature and reliable, not only meets the annual production requirements, but also has a lower construction investment than the 3/4 continuous rolling process. Industry experts recognize that its automation level, process layout, technical equipment, and comprehensive utilization of resources represent the advanced level of similar facilities in China.
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These products are small assembly parts, which are mostly used to assist the installation of internal structural parts of the car body, such as flanges, nuts, gaskets, etc., all of which are metal products, and can also be used in other civil industries. Other materials can be produced on demand. Standardize and customize various products, source manufacturers, operate with integrity, and have after-sales guarantee.
Jilin Zexin Industrial Development Co., Ltd. was founded in 2001 with a registered capital of 5 million RMB and is a high-tech enterprise in Jilin Province. There are about 100 employees, and the company's sales volume reached 20 million RMB in 2022. The company has more than 30 sets of various equipment including 2 NC laser cutting machines, 6 NC machining centers, 8 welding machines for different purposes, NC cutting machines, NC bending machines and others. After more than 20 years of construction and development, it has formed a comprehensive enterprise of electrical system, carbon steel, stainless steel and aluminum alloy stamping, welding, machining and surface coating. The company has passed the ISO9001:2015 quality management system certification, EN15085 CL1 welding system certification, American standard AWS welding certification, and ISO/TS22163:2017 quality management system certification. It is a high-quality supplier cooperated by CRRC Changchun Railway Vehicles Co., Ltd., the core manufacturer of China's urban rail transit equipment and high-speed train.
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Jilin Zexin Industry Development CO., LTD. , https://www.jilinzexin.com