The State Key Laboratory of Rolling Technology and Continuous Rolling Automation of Northeastern University and Baosteel Co., Ltd. collaborated and innovated to develop the first set of hot-rolled seamless steel pipe industrialized online control cooling system with controlled cooling and direct quenching functions in China, achieving international initiative. As a core control method for the structural performance control of hot-rolled seamless steel tubes, the controlled cooling technology has not been effectively broken for a long time, resulting in the improvement of product performance can only be achieved by adding more alloying elements and offline heat treatment process. Therefore, development and application control Cooling technology has become one of the key research directions of China's hot-rolled seamless steel pipe industry. In view of the circular section characteristics of hot-rolled seamless steel pipe, Northeastern University cooperated with Baosteel Co., Ltd. on the basis of breaking through the high-strength uniform cooling mechanism and control method of high-temperature pipe, relying on Baosteel Lubao PQF460 hot-rolled seamless steel pipe production line. Research on controlled cooling process of 10,000-ton seamless pipe. In 2018, the industrialized online control cooling system was fully completed and put into operation in Baosteel. Since the on-line cooling system was put into production, it has shown good application effect, high temperature control accuracy after cooling, uniform cooling, good tubular shape after cooling, obvious product performance improvement, remarkable process reduction effect, and has become a seamless pipe product online. The platform-based technical means of organizational performance regulation provides effective support for the further development of high-strength, toughness and high value-added steel pipe products.
Comments: The successful development of this technology has broken through the key core bottlenecks of product organization performance regulation in the field of hot-rolled seamless steel tubes. The successful development of the online control cooling system of hot-rolled seamless steel tubes with independent intellectual property rights has filled the international gap and realized The development and stable production of seamless steel pipe products with low cost, high quality and higher comprehensive toughness have made China the first country to master this technology and realize industrial application in the field of hot rolled seamless steel pipe.
2 Xingcheng Special Steel took the lead in developing 2000MPa bridge cable steel
In March 2018, Xingcheng Special Steel took the lead in developing the world's highest strength 2000MPa bridge cable steel, and successfully applied to the construction of the railway and railway bridge, achieving the international initiative, the products are in the world's leading level. After five years of painstaking research, Xingcheng Special Steel has successfully developed 1860MPa, 1960MPa and 2000MPa grade bridge cable steel. The 1960MPa grade bridge cable steel has been successfully applied to key nodes such as Humen Second Bridge and Yangshuo Port Bridge. The 2000MPa grade bridge cable requires a cable wire diameter of 7.0mm, high strength, and twisting more than 12 times. It is extremely difficult to match the toughness. Xingcheng Special Steel started from the composition design, inclusion control, organization control, etc., using ultra-pure smelting technology, tundish special pouring technology, controlled rolling and EDC online toughening treatment technology, after repeated trials, finally made a breakthrough, success At the Xingcheng high-speed wire rod factory off the assembly line. After inspection, the wire section shrinkage rate ≥ 30%, filling the world blank. The strength of ultra-high strength steel wire produced by this product reaches 2000MPa grade or above, leading the world cable steel manufacturing.
Comments: 2000MPa grade bridge cable steel is 13% stronger than the current mainstream products, and material savings of 13%. The successful application of this product on the dual-purpose bridge of the railway has filled the gap in the application of international engineering, indicating that the high-strength bridge cable steel in China has realized the transition from “follow-up”, “running” to “leading” and will become China. A new business card for high quality manufacturing and going global.
3 Automotive lightweighting with Jeep grade steel plate to achieve stable manufacturing in Baosteel
The Jipper-class automotive panels mainly refer to cold-rolled and galvanized ultra-high-strength steel sheets with a tensile strength of not less than 1 GPa. They are the key materials for the competition of lightweight materials and represent the development direction of automotive steel. Aiming at the forming characteristics of different parts of automobile parts, using the phase change strengthening mechanism and the precise design of components and processes, Baosteel has developed five series of steel plates with tensile strength not less than 1GPa, including high-performance and low-cost dual-phase steel. (DP), high bending properties and high resistance to delayed cracking of martensitic steel (M) and duplex steel (CP), quenched ductile steel (QP) with excellent stamping properties and twinned inducible plastic steel (TWIP) Mass production. In particular, based on the world premiere of the popular cold PQ series, the QP hot-dip galvanizing alloy (GA) series was launched. In view of the problems of more alloy elements in the Jipai-class automotive sheet products, the quality of the steel plate is sensitive to the process and the fluctuation is large, Baosteel has focused on the bubble control of steel-making high-silicon steel; the softening and homogenization control of hot-rolled steel coils, continuous annealing Dynamic process control and surface quality control technology for high-silicon steels enable stable manufacturing of Jeep-class automotive panels. At present, the domestic production share of this technology is nearly 60%. The successful development of ultra-high-strength steel has laid a material foundation for the lightweighting of automobiles in China and contributed to the reduction of energy and energy saving of automobiles.
Comments: Jipa-class ultra-high-strength steel is the key material for realizing light weight of automobiles. The most outstanding innovation of this project is the new generation of ultra-high-strength steel represented by quenched ductile steel, which is the first industrial application in the world. The series of key manufacturing and use technologies enable stable manufacturing and application. The successful development of the Jipa-class ultra-high-strength automobile board indicates that China's automotive steel has achieved a leap from following to a partial lead, leading the development of lightweight materials for automobiles in China.
4 Carbon dioxide is leading the world in resource utilization technology for steelmaking
The R&D team of Beijing University of Science and Technology aims to reduce the generation of soot at the source. It is found that CO2 injection in steelmaking can not only suppress the generation of soot, but also strengthen the mixing of molten pool, reduce the content of phosphorus, nitrogen and oxygen in molten steel, and achieve clean smelting; The theoretical system of CO2 steelmaking has broken through the key technologies and completed the industrial demonstration and promotion of CO2 resource application. The main inventions and innovations are as follows: 1) The first demonstration of CO2 resource utilization in 300t converter steelmaking at home and abroad, subverting the traditional treatment methods of steelmaking fume, reducing steel consumption and environmental load, and realizing the conversion of CO2 energy. . 2) Invented the method of injecting CO2 enhanced agitation to achieve high-efficiency dephosphorization, breaking through the technical bottleneck that has long plagued high-efficiency deep dephosphorization of steelmaking. 3) Invented the CO2 deep denitrification and end point oxygen control method, and realized the clean production of high quality steel denitrification and oxygen control. 4) Invented the method of using CO2 to extend the life of the bottom blowing component of steelmaking furnace, which is a major breakthrough in the technology of converter and electric arc furnace bottom blowing. The technology relies on the Shougang Jingtang 300t converter to complete the industrial application demonstration. The ton steel dust emission is reduced by 9.95%, the steel material consumption is reduced by 3.73kg, the gas volume is increased by 5.2%, the CO2 is reduced by 20kg, and the energy saving is 4.37kgce. At present, the clean smelting technology has been applied to a number of enterprises, opening a new era of CO2 resource recycling application in steel processes.
Comments: This project is aimed at two major technical problems: large amount of soot generated in the steelmaking process and high CO2 emission. The project uses the reaction endothermic effect of CO2 to achieve steel reduction and dust reduction. For the first time, the method of applying CO2 resource to steelmaking is a major technical invention. The theoretical system of CO2 steelmaking has been established and improved. The realization of CO2 resource utilization is realized while achieving energy saving and emission reduction and clean smelting. The supplement and improvement of traditional pure oxygen top-blown steelmaking technology.
5 The world's first 10,000-ton clean vanadium production line achieves stable operation
In response to the problems of the utilization of vanadium and chromium in the utilization of vanadium-titanium magnetite in China, such as low utilization rate of vanadium and chromium resources and heavy pollution in the production process, Hegang Steel and the Chinese Academy of Sciences jointly tackled the problem and established several sessions based on the support of the two National 973 Programs. Strengthening the new method of high-efficiency conversion of sub-molten salt, forming a sub-molten salt medium enhanced oxidation, vanadium chromium clean crystal separation, medium efficient closed cycle, vanadium chromium high value product green preparation, vanadium tailings full quantitative utilization features all The independent extraction of vanadium and the green manufacturing integration technology of independent intellectual property rights completed the technical expansion test and the 1,000-ton pilot test in 2009-2015, forming a complete industrialization process plan, and completed the world's first in June 2017. The 50,000-tonne sub-molten salt vanadium slag high-efficiency vanadium production line has achieved continuous and stable operation. The project's technical and economic indicators and environmental benefits are among the world's leading. It can realize the efficient co-funding of vanadium and chromium in vanadium slag. The annual source will reduce 25 million cubic meters of waste gas, 200,000 tons of high-salt ammonia-nitrogen wastewater, and 50,000 tons of heavy metal slag. No three waste pollutants were discharged, and the process cleaning index reached 97.6. The implementation of the project will support the efficient and clean utilization of China's large-scale vanadium-titanium magnetite resources.
Comments: The production of the vanadium salt cleaning vanadium production line is the first international demonstration project for the clean production of vanadium with independent intellectual property rights. The completion application of the project will increase the utilization rate of vanadium resources by more than 10% and increase the utilization rate of chromium resources by more than 80%. It will drive the transformation of vanadium resource processing and preparation technology into green and clean production in China and the world. It is the development of efficient and clean utilization of resources in the future. direction.
6 Flowserve dry process integrated flue gas treatment technology to help steel ultra-low emissions
FOSS (Foss) dry process integrated flue gas treatment technology is developed based on the consistent circular economy pollution control concept of Zhongjing Environment. This technology uses BSS polymer generator and industrial solid waste as the main raw material to absorb BMP polymer. The three key technologies of the powerful absorption tower are the key technologies of desulfurization, denitrification, deoxygenation and defluorination. It can process sulfur dioxide and nitrogen oxides in flue gas. , dust in a conventional tower, non-high temperature environment, no ozone, no need to spray ammonia, to achieve ultra-clean removal of sulfur and nitrate, and no secondary pollution, no carbon emissions, no waste water, good smoke perception The advantages of recycling and by-products can help enterprises achieve ultra-low emission targets comprehensively, stably and economically (and achieve near-zero emissions under relatively economic conditions). The main technical innovations are as follows: 1) The main components of BMP polymer absorbent are modified by chemical methods from sludge, red mud, calcium carbide slag, steel slag and water slag. 2) By using BMP polymer absorbent, sulfur, nitrate and dust in the flue gas can meet the requirements of environmentally-friendly ultra-low emission, and at the same time, 100% of the desulfurization slag can be utilized for the production of new environmentally-friendly building materials. 3) The entire FOSS dry system has strong compatibility with fluoride, mercury and dioxins. When the state requires these pollutants to be included in the emission assessment standard, it is only necessary to simply adjust some of the above three key technologies. It is easy to achieve standard emissions without the need to add other equipment or process technology.
Comments: FOSS dry integration integrated flue gas treatment technology has been successfully applied in many enterprises such as Tangshan Delong. Through the application of this technology, not only can enterprises achieve ultra-low emissions, but also enable enterprises to reach the more stringent smoke emission standards that the country will implement in the future. The technology is simple in operation, practical, low in investment and operating costs, has high social and economic value, and has been well received by steel companies. The promotion of this technology is of great significance to the technological advancement of the environmental protection industry and the industrial upgrading of related industries.
7 MCC Jingcheng launches a new generation of steel intelligent manufacturing overall solution
Intelligent manufacturing is the development direction of China's vigorous development of high-end equipment manufacturing industry and future manufacturing technology advancement. Zhongye Jingcheng has gathered the essence of steel industry engineering technology for nearly 70 years. It is innovative and put forward a new generation of intelligent manufacturing overall solution for the steel industry. With digital as the core, it realizes the digital life management of steel enterprises based on BIM technology. (Planning, design, construction, delivery to operation and maintenance), innovatively built a new generation of steel enterprise intelligent manufacturing system architecture. The program uses the core concept of “one center, one map, one platform” to integrate a new generation of intelligent manufacturing information system (including digital factory management and control platform, full-process big data analysis system, intelligent manufacturing execution system, intelligent energy management system, and full Process advanced metallurgical intelligent control system and expert control models in key areas, etc., integrate the enterprise's control center, cloud data center and network center to build the core brain of the daily production and operation of the enterprise; by creating the same proportion as the actual factory Large and small three-dimensional digital factory map, build a virtualized factory, realize the comprehensive digital management of steel enterprises (including factory digitization, workshop digitalization, equipment and pipeline digitization), and integrate the data information of all levels of information systems of enterprises, visualization, digitization and intelligence Centralized management of the company's production, energy, logistics, equipment and other major businesses. The next-generation steel industry intelligent manufacturing solution is supported by the digitalization of the factory. Combined with the application of big data technology and artificial intelligence, it realizes factory visualization, data analysis, life cycle operation and maintenance service management, quality control and energy balance optimization in the whole process of products. Preventive maintenance of equipment, research and development of new steel grades, etc., bring better service to enterprises, greatly improve the overall operational efficiency of enterprises and reduce operating costs, and truly realize self-learning and self-optimizing intelligent steel mills.
Comments: The new generation of steel industry intelligent manufacturing overall solution, deeply integrated with a new generation of information and communication technology and advanced manufacturing technology, the comprehensive digital concept throughout the entire life cycle of planning, design, construction, delivery to operation and maintenance of steel companies. The intelligent manufacturing overall solution not only fully combines the intelligent and informatized achievements that domestic steel enterprises have built, but also clearly describes the areas that need further development and improvement in the future, and can well adapt to the complex equipment of China's traditional steel industry. Sex, production process polymorphism and unpredictability have drawn a grand blueprint for the future development of China's steel industry.
8 China Steel Equipment Belt Roasting Machine Pellet Technology has reached the international advanced level
There are two main processes for producing iron ore pellets in the world, namely the belt roasting process and the grate-rotary kiln process. Because the belt roasting machine has strong adaptability to raw materials, high production efficiency, and has the advantages of environmental optimization, production intelligence, and large-scale, the production of belt roasters is increasingly selected in foreign pellet production. Before the advent of the belt roasting machine technology of Sinosteel Equipment Co., Ltd., this technology was still blank, and the core of technology was long-term monopolized by German companies. Sinosteel Equipment's “Routing and Innovation of Belt Roasting Pellet Technology” project has carried out comprehensive technological innovations from five aspects, including: core system process technology, core equipment R&D and manufacturing, roaster thermal system and advanced Combustion technology, furnace lining structure and new refractory materials, EPC project management. The technology has passed the scientific and technological evaluation organized by the China Iron and Steel Association and confirmed that the technological achievements have reached the international advanced level and have important promotion and application value. Sinosteel Equipment Co., Ltd. belt roasting machine pellet technology successfully realized the application of localization technology and equipment of belt roasting pellets with independent core technology system, which not only broke the long-term technological monopoly of foreign companies in this field, but also greatly promoted China's ironmaking is moving towards green production, intelligent manufacturing, energy conservation and environmental protection. At present, this technology has played an important role in the new situation of the domestic steel industry, providing technical support and services to many enterprises.
Comments: The belt roasting machine pellet technology has successfully realized the application of the localization technology and equipment of the belt roasting machine pellets with its own core technology system. It is a green production technology that meets the needs of the times. Iron ore pellets are important raw materials for blast furnace ironmaking. The development of high-quality pellets and the increase of the proportion of high-quality pellets into the furnace will greatly improve the quality of ironmaking. At the same time, it will change the modern ironmaking to sinter. The pattern will have a huge boost to the smart manufacturing and green development strategies of steel companies.
Posco Steel has developed a second generation of highly corrosion-resistant surface treated steel products called PosPVD (Poscoe Physical Vapor Deposition). PosPVD uses electromagnetic heating physical vapor deposition technology to apply zinc, zinc-magnesium, aluminum-magnesium coatings on the surface of steel sheets by continuous vacuum deposition. The products can be used in automotive, home appliance and construction industries. The most important feature of this product is the electromagnetic heating coating. Under vacuum conditions, the induction coil heats the coating material, and the vapor formed by evaporation moves to the surface of the steel sheet and is sprayed by a nozzle heated at a high temperature. This coating process not only achieves continuous coating, but also has high heating efficiency, minimizes heat loss, continuously supplies the coating metal in the form of metal vapor, and prepares a uniform alloy coating by electromagnetic stirring. To date, Posco has installed a wide PVD production line and in November 2018 launched a zinc-magnesium coating prototype for PosPVD steel. The production line is connected to the rear end of the multi-coating equipment to produce products with a thickness of 0.4-2.0mm and a width of 900-1450mm. It can also be degreased and chrome-free after-treatment, which not only forms a uniform coating. Moreover, the surface quality is also very prominent. Compared with the existing coated products, the appearance of the crystal grains is more regular, and the corrosion resistance after processing and the corrosion resistance after cutting are also high.
Comments: Since the PosPVD steel plate does not form bubbles after coating, the corrosion resistance after forming is high; since it does not cause large wear, the efficiency of the stamping process is also improved. In addition, the welding performance test showed that the breaking strength of the welded portion reached the same level as that of the galvanized steel sheet. This product can be used as a double-joined steel plate instead of high-priced aluminum and stainless steel plates or as an auxiliary material, and bonded with an aluminum base material by a resin binder, which can be used as a high-grade building material.
10 Molong HIsmelt's new process for continuous industrial production
The HIsmelt smelting reduction production process is the cutting-edge technology in the metallurgical field. After more than 30 years of research and development, the process technology has gradually matured. In 2005, the Quinna plant in Australia verified the feasibility of the industrial scale of the HIsmelt process through production practices, but at the same time there are many problems. In 2012, Shandong Molong Petroleum Machinery Co., Ltd. introduced the HIsmelt technology and equipment from the Kunana Plant in Australia, and joined the Beijing University of Science and Technology to carry out the HIsmelt process for the problems in equipment, technology and production processes. Improvements and optimizations have made great strides in process stability, equipment durability, operational flexibility, and comprehensive utilization of resources and energy. After five years of process adjustment and equipment optimization, HIsmelt smelting reduction production process achieved continuous industrial production for the first time in 2016. It is the only industrialized smelting reduction process for direct smelting of powdery materials without agglomeration process. . In May 2018, the China Institute of Metals organized a scientific and technological achievements evaluation meeting of the project “Development and Application of Molong HIsmelt Fusible Reduction Technology” in Beijing. Expert committee members unanimously determined that the project has reached the international leading level.
Comments: The HIsmelt process is the first commercial realization of the HIsmelt process. It is also the only new ironmaking process that can be used without coke and iron ore fines. Compared with the current blast furnace ironmaking process, it has ultra-low emission. The advantages of environmental protection and low investment cost, and the use of low-quality iron and carbon-containing raw materials to produce high-quality clean molten iron, this process provides a new idea for the transformation and upgrading of the steel industry.
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