Capital Engineering & Research Incorporation Limited (hereinafter referred to as "CERI") is dedicated to strengthening its core functions, enhancing capabilities, and continuously improving its competitiveness and long-term value realization. In the field of steel rolling, CERI has undertaken the construction of more than 200 cold and hot rolled strip production lines, more than 300 long product rolling projects, and 500 heating furnaces over the decades. This extensive experience has enabled CERI to develop a range of key products, including medium-thick plates, hot and cold rolled products, long products, and heating furnaces.

Key Technologies for Process and Equipment of Thin Strip Casting-rolling Line 

Introduction 

As the exclusive technical partner for CASTRIP® ultra-thin strip technology and the company responsible for the complete set of equipment in China, CERI can provide users with all-round solutions. This includes full-line technology integration, core equipment manufacturing, design and supply of all rolling line equipment, design and supply of finishing line equipment, supply of electrical and instrument equipment, as well as installation and commissioning services. By persistently promoting the localization of thin strip casting and rolling technology, CERI has helped users make new breakthroughs in reducing investment and operating costs, improving product competitiveness, and accelerating product structure adjustment. CERI's efforts in this area have resulted in 24 patent applications for relevant achievements. 

Typical Project: Shagang Group's Ultra-thin Strip Casting and Rolling Line 

Highlight I: The length of the production line is less than 50 meters, and the floor area is only 10% of that required for a traditional hot continuous rolling line. 

Highlight II: The total energy consumption of the thin strip casting and rolling process is only 16% of that required for a conventional hot continuous rolling process, 32% of a thin slab continuous casting and rolling process, and 45% of an endless rolling process. 

Highlight III: The CO₂ emissions generated are 25% of those from a traditional hot continuous rolling process, 34% of a thin slab continuous casting and rolling process, and 44% of an endless rolling process. 

Highlight IV: Compared to conventional hot continuous rolling, the fuel consumption is reduced by 95% and water consumption by 80%. 

 

Core Technologies for Production Process and Equipment of Medium-thick Plates 

Introduction 

CERI is the only full-range comprehensive system supplier capable of providing consultation and design services for medium-thick plate processes as well as whole-line equipment and automation control systems and models in China. CERI is also a leading member of the "National Team for Medium-Thick Plate Metallurgy Construction" under China Minmetals Corporation MCC, playing a pioneering role in medium-thick plate process technologies, equipment, and electronic control in China. CERI boasts a suite of innovative processes and technologies, including through-type thick plate production line, ultra-long plate rolling process, and angular rolling process. The company also has self-developed technologies such as reliable and high-precision thick plate rolling mills, high-performance straighteners, energy-saving and environment-friendly shearing machines, and closely-arranged cooling beds. Furthermore, CERI possesses comprehensive automation and intelligence technologies for medium-thick plate production, including high-precision rolling models, optimized distribution control of cooling beds, synchronization and anti-deviation control of double-side shears, intelligent and optimized shearing, digital twin, and health monitoring and optimization of production lines. CERI's efforts in this area have resulted in 83 patent applications for relevant achievements. 

Typical Project 1: 4,200 mm Thick Plate Project of Baosteel Zhanjiang Iron & Steel Co., Ltd. 

Highlight I: The Project involved the largest single production line relocation in China, with the comprehensive technical services covering the process equipment of the whole line. This Project established a new model for thick plate production line relocation projects in China. 

Highlight II: For the first time in China, the Project adopted a through-type process layout where the rolling line and shearing line were directly connected in the thick plate production process. This innovative layout created favorable conditions for ultra-long steel plate rolling. 

Highlight III: The Project pioneered the large-scale adoption of total axial rolling technology, which increased the maximum piece weight of rolled steel plates from 18 tons to 36 tons. 

Typical Project 2: 3,800 mm Thick Slab Project of Yingkou Jinghua Iron and Steel Co., Ltd. 

Highlight I: CERI served as the general contractor for this Project, which for the first time adopted an "independent design + manufacturing" approach for all thick plate process equipment. This mode enabled the transformation from "system integration" to "versatility" in the thick plate production domain, achieving a significant leap in the performance of all production line equipment. 

Highlight II: The Project achieved the design and supply of double-housing 3,800 mm plate mills, applying numerous advanced technologies. This included the first localized application of a roll shifting system, successfully reversing the longstanding reliance on foreign mill design technology. 

Highlight III: The Project's shearing system, which includes the crop shear, cut-to-length shear, and double-side shear, has been optimized to save energy and reduce consumption. The shear efficiency has been increased by 11%, and the yield has been increased by 0.12%. 

Typical Project 3: 5,600 mm Roughing Mill Supply Project of Henan Iron and Steel Group's Zhoukou Steel 

Highlight I: The Project involved the independent design and supply of the world's first 5,600 mm thick plate rolling mill, which is considered the "king of rolling mills". 

Highlight II: The Project incorporates over ten advanced technologies in the rolling mill field, including corrosion and wear resistance technology for mill housings, which extends the housing repair life by approximately 30%; stable and efficient work roll bending technology, which prolongs the maintenance cycle by about 20%; quick roll changing technology, which reduces roll changing time by around 10%; and new breast roll technology, which decreases replacement time by about 50%. 

Highlight III: The intelligent monitoring technology of high-torque spindle is employed to monitor the working condition of rolling mill throughout the process. 

 

Key Technologies for the Process and Equipment of Combined Pickling and Rolling Lines 

Introduction 

CERI is China's first supplier to offer a complete set of mechanical, electrical, and hydraulic equipment for combined pickling and rolling lines, achieving full domestication and independent R&D of core technologies. Key technologies adopted for combined pickling and rolling lines include large-tension scale breaking and straightening, shallow-tank and high-turbulence pickling, fully automatic turret-type rotary shear, high-precision large screw-down six-roll and four/five/six-housing cold tandem rolling, high-speed rotary shear, Carrousel tension reel, and low pressure loss and high-flow process lubrication. These innovations enable stable operation at rolling speeds of 1500–1800 m/min while ensuring high quality, precision, and low energy consumption. The products encompass plain carbon steel, quality and special steel, and electrical steel, with applications spanning the 950–1750 series. CERI's efforts in this area have resulted in 85 patent applications for relevant achievements. 

Typical Project 1: PL-TCM of Tianchuang 

Highlight I: The PL-TCM primarily focuses on carbon steel products, with silicon steel products as a supplement. The highest grade of silicon steel reaches 35W440. 

Highlight II: A combination of blocking, purging and suction technologies is utilized for emulsion removal on strip steel surfaces, effectively addressing emulsion residue caused by high flow during high-speed rolling. 

Highlight III: Products of 0.37 m are produced in large quantities at a stable high speed of 1500 m/min, achieving a yield of 98.5%. 

Typical Project 2: PL-TCM (Phase I & Phase II) of New Donghai 

Highlight I: The PL-TCM operates reliably, surpassing its production target by approximately 30% in 2023. 

Highlight II: The PL-TCM features advanced functions and a high degree of automation, including automatic strap removal at the inlet, a fully automatic welding machine, imported equipment for large process instruments, and automatic strapping, resulting in a reduction of approximately 20% in operator requirements. 

Highlight III: Various energy-saving measures have been implemented to reduce energy consumption per ton of steel by approximately 10%. Additionally, the oil mist emission index of the rolling mill is maintained at less than 10 mg/m³, significantly below the special emission limit set by the Emission Standard of Air Pollutants for Steel Rolling Industry (GB 28665). 

 

Key Technologies for the Process and Equipment of Continuous Galvanizing (Galvalume) Lines 

Introduction 

CERI offers comprehensive consultation, engineering design, and package supply services for continuous galvanizing (galvalume) lines. The galvanizing line incorporates advanced technologies, including multi-stage waste heat recovery, high-efficiency cleaning, patented furnace nose zinc ash control and cooling, large rolling force finishing and online quick changing technology, a full-servo vertical roll coater, high-precision turret-type trimming shear, high-performance rotary shear, and a high-rigidity adaptive belt wrapper. This line is characterized by high automation, excellent plate surface quality control, robust shape adjustment capabilities, and energy efficiency with environmental protection. It can produce various coatings such as GI, GA, GL, and ZAM, meeting the quality standards required for steel used in the automotive, household appliance, building materials, and other industries. CERI's efforts in this area have resulted in 26 patent applications for relevant achievements. 

Typical Project 1: CGL1–CGL2 (Phase I) and CGL1–CGL4 (Phase II) of Hebei Anfeng Iron & Steel Co., Ltd. 

Highlight I: Energy-saving measures, including an ultra-low temperature discharge system within a three-stage waste heat recovery system, a staged countercurrent system in the cleaning section, and ultra-low water consumption, have been implemented to reduce overall energy consumption by 10%–15%. 

Highlight II: Utilizing automatic detection instruments and specialized structures, the comprehensive process automation control ensures continuous, stable, and efficient production from raw material coiling at the inlet to finished product cutting at the outlet, enhancing production efficiency by 15%–20%. 

Highlight III: The line employs several advanced surface quality control technologies, including furnace nose zinc ash control, precise coating pot temperature control with high-efficiency induction, long-life coating pot roll technology, and high-precision closed-loop control air knife system. These measures ensure high-quality surface and product performance, achieving a first-grade product rate of up to 99%. 

Typical Project 2: CGL1–CGL3 of Shanxi Jingang 

Highlight I: The line utilizes several proprietary technologies, particularly furnace nose zinc ash control for zinc, aluminum, and magnesium products, patented cooling technology, and stabilization and anti-shake technology for strip steel. These innovations ensure high surface quality and product performance, resulting in more stable product quality compared to similar lines, with a first-grade product rate increased by approximately 2%–3%. 

Highlight II: Comprehensive waste heat recovery and recycling technology, along with an intelligent temperature control model and digital management of energy consumption integrated with a digital factory, have been implemented to reduce overall energy consumption by 12%–15%. 

 

Technologies and Equipment for Rolling Long Products of Quality and Special Steel 

Introduction 

CERI Long Product Co., Ltd. is the first engineering firm in China to achieve process technology integration and is capable of managing core processes and EPC general contracting for "turnkey" projects. The company has mastered essential core technologies, including deformation degree, speed, and temperature, for a wide range of quality and special steel products, such as bearing steel, gear steel, spring steel, non-quenched and tempered steel, structural alloy steel, and special materials such as titanium alloy and nickel-based alloy. It owns ZJD-Ⅵ series short-stress-path rolling mills with independent intellectual property rights, crank/rotary shears, and the innovative "hot bed", along with other advanced temperature control products. 

The dimensional accuracy of quality and special steel products achieves 1/4 DIN, while their metallographic structure and mechanical performance indicators meet international advanced standards. These products are extensively used in high-end manufacturing sectors, including automobile, high-speed railway, engineering machinery, aerospace, weapons, and military supplies. 

Typical Project: Project of Xianyang Tiancheng Titanium Industry Co., Ltd. 

Highlight I: The new "replacing forging with rolling" process for super-large section titanium alloys was pioneered in China, achieving a world record by producing Ø85–350 mm round ingots with a maximum diameter of 900 mm through rolling. This innovation has increased single machine output by nearly eight times and reduced processing costs by approximately 40%. 

Highlight II: The high-efficiency "rolling in one heat" process for titanium alloys used in aerospace applications has achieved a historical breakthrough, increasing the weight of a single coil of titanium alloy rod and wire from 70 kg to 200 kg. 

Highlight III: The project features the world's largest complete set of BDM850 rolling equipment and control system, enabling reversible rolling with rapid transverse movement. It achieves a transverse movement accuracy of ±0.3 mm, axial movement of less than 0.2 mm, and product accuracy exceeding 1/3 DIN. 

 

Fully Home-made 120 m/s High-Speed Wire Rod Technology and Equipment 

Introduction 

To meet the demand for efficient production of high-quality industrial wire rods, CERI has pioneered the "1+1+2" reducing and sizing process and a high-degree-of-freedom precision rolling technology with a single pass design. It has independently developed reducing and sizing equipment featuring "high load-bearing reducing + small spacing sizing" and a comprehensive suite of high-rigidity, high-precision electrical control technologies. This innovation enables free reducing and precise sizing of products while significantly enhancing production flexibility, product quality, accuracy, and yield. In the project of KISC, CERI addressed the "bottleneck" issue of reducing and sizing equipment, achieving a breakthrough from "Zero to One", and earned the first prize of Metallurgical Science and Technology Award in 2024, significantly contributing to the advancement of wire rod equipment and technology in China. 

Typical Project: Luoyuan High-speed Wire Project 

Highlight I: It adopts advanced temperature control technologies such as hot delivery and direct rolling, hot delivery and hot charging, controlled rolling and controlled cooling, low-temperature rolling, "triangle" shaped blower arrangement, and gridded air volume distribution technology. These technologies ensure high cooling efficiency and uniformity, contributing to a rolling temperature accuracy controlled within ±10°C and a same-coil performance difference of less than 20 Mpa. 

Highlight II: All finished products are produced from the reducing and sizing mill, which improves production efficiency and reduces roll consumption. Based on the concept of flexible rolling, a series of modular rolling mills featuring high speed and high bearing capacity are used in the high-speed zone to realize high process flexibility and a maximum rolling speed of 120 m/s. 

Highlight III: Before the reducing and sizing mill, a 120 m/s ultra-high-speed rotary shear is equipped to realize head cropping and accident chopping of ultra-high-speed rolling pieces, thus reducing manual processing in the collection procedure and improving the rolling line's automation level. 

 

Full-localization 45m/s High-speed Bar Production Line 

Introduction 

CERI Long Product Co., Ltd. has developed high-speed bar production technology and equipment, realizing a stable rolling speed of 45m/s for producing Ø10mm-Ø25mm small-sized deformed steel bars, an annual output of single high-speed bars of no less than 800,000 tons and double-high steel bars of no less than 1,500,000 tons. The technology produces products with high surface quality and dimensional accuracy, contributing to a multiple-length shearing accuracy of ±60 mm, a high yield above 98.2%, and an increase in negative tolerance income by about 0.5%. It won the First Prize of the China Metallurgical Science and Technology Award in 2020. In addition, the high-speed bar technology makes controlled rolling and cooling easier and reduces alloy addition, reducing the cost per ton of steel by RMB 30~50 and realizing fine production of ordinary deformed steel bars. 

Typical Project: Double High-Speed Bar Project of Ulanhot Steel of Jingye Group 

Highlight I: Green and low-carbon. The technology can realize more accurate low-temperature controlled rolling and more efficient graded cooling control, meeting the requirements of new Chinese national standard GB 1499.2-2024 for hot rolled steel bars. The average manganese content is reduced by more than 0.3% without vanadium addition, and the control accuracy reaches the international optimal level, effectively reducing alloy consumption and realizing alloy-reduced green production of hot rolled steel bars. 

Highlight II: Flexible process. The separate drive technology of finishing rolling mills is adopted to enable inter-housing flexible adjustment and extension and meet the screw-down requirements of housings of different specifications, ensuring process flexibility to the greatest extent. 

Highlight III: High-speed operation. The high-precision and ultra-heavy-duty CMM-III-310 modular line can realize low-temperature rolling at 750°C, and the system can operate with the speed of strip movement stably at 45 m/s. 

Highlight VI: High-precision products. The self-developed i-PEDM control technology is adopted to address low multi-length measurement accuracy caused by speed fluctuation and ensure a multi-length accuracy of rolling pieces of less than ±60 mm. 

 

CPE Push Bench Technology and Equipment 

Introduction 

CPE push bench technology is of great significance for the efficient processing of seamless steel pipes in a low-carbon and environment-friendly manner by "replacing cold rolling with hot rolling". CPE line adopts inert continuous rolling, with moderate output and high product quality. CERI Long Product Co., Ltd. has developed CPE line products including Series 60, 89, 102, 114, 140, 180, 219 and CPE push bench sharpening technology covering Ø 27~219mm products. 

Typical Project: CPE Push Bench Project of Changzhou Changbao Jingte Energy Pipe Co., Ltd. 

Highlight I: Simple production process and low equipment investment, especially in the electrical part; simple equipment and tools and low energy consumption. 

Highlight II: Fast rolling speed, long pierced billet exceeding 14 m, and high product quality. In particular, the technology can produce double-length hot-rolled seamless steel pipes with small sizes (below Φ100 mm) and thin walls (S≤6 mm). 

Highlight III: No pickling and heat treatment required, saving cost by more than 30%. 

 

Intelligent Pipe Processing 

Introduction 

The new generation of intelligent process technology and equipment for pipe processing production lines represented by piece-by-piece steel pipe tracking, industrial robot application, intelligent detection, and Internet of Things used in industrial production lines can reduce staffing by 40% compared with traditional pipe processing production lines, greatly reduce labor costs, and make product quality more stable. The Company currently has integration technologies for intelligent pipe processing lines such as tubing and casing production lines and can provide customers with more efficient and higher quality pipe processing equipment and technology. 

Typical Project: Special Oil Pipe Project of Dalipal 

Highlight I: The image recognition technology is used to track materials, improving process controllability in production. 

Highlight two: The product quality is improved. A product quality traceability system is established, reducing the defect rate by 2%. 

Highlight III: Productivity is saved. The technology enables a staffing reduction of 40% when compared with the traditional pipe processing production line. 

 

Long Product Rolling Mill 

Introduction 

Based on precise dimension control and intelligent rolling, the new-type long product rolling mill is a flexible pass system to help improve the intelligence level of the rolling line. In terms of equipment structure, a series of technologies and structures featuring high rigidity, high strength, and impact resistance are adopted to guarantee the dimensional accuracy of rolled products. In addition, the rolling mill is equipped with an intelligent roll gap adjusting device, automatic roll pass adjusting device, and automatic fast housing replacement system, which are supplemented by technologies such as the digital acquisition of rolling equipment status and data analysis system. All these make O&M and spot checks easier and realize unmanned/less manned intelligent rolling. 

Typical Project 1: Short Stress Path Rolling Mill for New Special Steel Project of China Baowu-Masteel Group 

Highlight I: The structure of short stress paths and high-rigidity components is adopted to improve the rigidity of the rolling mill. The product accuracy is far better than Class 1 accuracy specified by the Chinese national standard and can reach 1/4DIN. 

Highlight II: An internal reverse-hanging balancing device and spherical anti-axial movement mechanism are adopted to greatly eliminate the radial and axial clearance of the rolling mill, ensuring high rolling stability and reliability and improving product quality. 

Highlight III: A triple sealing system and integral guide beams are adopted to prolong parts service life and reduce operation costs. 

Highlight IV: The technologies of remote automatic roll gap adjustment, roll pass adjustment, and guide traverse movement are adopted to improve the operation rate and realize intelligent rolling. 

Typical Project 2: High-speed Wire Reducing and Sizing Rolling Mill for KISC 

Highlight I: The "1+1+2" innovative process mode and the high-degree-of-freedom precision rolling technology with flexible single pass are adopted to significantly improve the production efficiency, and the product accuracy can reach ±0.1mm. 

Highlight II: The line consists of a high-load reducing mill and a small-pitch sizing mill. The original anti-impact oil film bearing and high-rigidity eccentric sleeve technology is adopted for roll boxes to effectively address insufficient load bearing, realizing a rolling temperature of 750°C and effectively improving the rolling control level. 

Highlight III: High-rigidity rolling control system. With the system, the biting speed drop is ＜ 0.1%S, the steady-state speed regulation error is ＜ 0.1% and the rolling stability is effectively improved. 

Highlight IV: The reducing mill 1+1 adopts independent drive control to realize the free adjustment of head and tail tension between reducing mills, reducing the unqualified length at the head and tail of rolling pieces and greatly improving the yield. 

 

Full Series of Full-localization Long Product Shearing Machines with International Leading Technical Level 

Introduction 

The crank rotary shear has a maximum shear force of 4.5 MN; the crank/rotary combined transverse shear has a shear force of 1.25 MN and supports multi-length shearing of 18 m/s bars; the multi-slit rotary shear supports simultaneous cutting of the head, tail and scrap segments of 5 bars; the high-speed wire rod rotary shear can reach a shearing speed up to 120 m/s; the cold-stop shear with a shear force of up to 13 MN is currently the largest fixed-length shearing machine in the domestic market. Mature or new shearing machine products are widely used for cutting heads, tails, scrap segments, and multi- and fixed-length shearing of rolling pieces in long product production lines, providing guarantees for stable operation. Our new shear products in recent years are in a dominant position in the industry market. 

Typical Project: Cold-stop Shear (Yongfeng High-speed Bar Production Line in Shandong) 

Highlight I: With a maximum shear force of 13 MN and a shear edge width of 2100 mm, it is currently the cold-stop shear with the largest shear force in the domestic market and fills the technical gap of cold-stop shear with a shear force above 10 MN in China. 

Highlight II: The side clearance adjustment mechanism for non-clearance contact flat and arc shear edges and replacement device for multi-degree-of-freedom shear edges have a service life of more than 12 months, thus increasing the operation rate of shears by about 1%. 

Highlight III: The unique air circuit boosting system can prolong the service life of internal friction plates of clutches and brakes, thus reducing spare parts cost by about 70% and achieving remarkable economic benefits. 

 

Controlled Rolling and Controlled Cooling Technology 

Introduction 

It is the earliest break-through in temperature closed-loop control technology in China and the independently developed complete set of products with controlled rolling and controlled cooling technology includes the following parts: controlled rolling and controlled cooling process, controlled cooling nozzle and valve stand integration, and controlled cooling software and control system. The three are organically combined to form a complete set of electromechanical products with the controlled rolling and controlled cooling process as the core. 

The products can be widely used in the production lines of bars, wire rods, and profiles in the fields of plain steel and high-quality special steel and realize functions including low-temperature finishing rolling, fine grain rolling, waste heat quenching, and through-water solution annealing. 

Typical Project: High-quality Special Steel Bar 

Highlight I: Multi-channel water cooling and rapid traverse switching improve the operation rate. 

Highlight II: The water tank with water cooling channels' height adjustable improves the cooling section uniformity of rolling pieces. 

Highlight III: Closed-loop temperature control can be realized, and the temperature control accuracy can reach ±10°C. 

Highlight IV: The technology can realize thermo mechanical control rolling and rapid cooling after rolling. With the carbide grade of bearing steel controlled within 1.5~2.0, and the hardness of gear steel within 220~260 HBW, the technology greatly improves the mechanical properties of products and downstream processing performance. 

 

Flameless Combustion Ultra-low Nitrogen Emission Technology Based on Source Control (Internationally Advanced) 

Introduction 

Customized services of ultra-low nitrogen combustion and control strategy are provided for projects according to specific process requirements and actual auxiliary conditions of iron and steel enterprises. The overall nitrogen oxide emission of steel rolling heating furnaces can be controlled to NOx ≯ 100 mg/Nm³ (8% O₂), truly realizing the control of nitrogen oxides from the source. The project outcomes reached the internationally advanced level according to the appraisal by the industry's authoritative experts, and 15 patents have been applied. The technology is applicable to various high-temperature industrial furnaces and kilns. 

Typical Project 1: Medium Bar Heating Furnace of Relocation Project of HBIS Group Shisteel Company 

Highlight I: Ultra-low nitrogen natural gas burners are adopted, reducing nitrogen oxide emission to NOx ＜ 70 mg/Nm³ (8% O₂). 

Highlight II: Full automation of production organization and process switching is realized under the multi-grade and multi-process production mode for small-quantity orders in special steel production. 

Typical Project 2: Heating Furnace for No.4 Bar Branch Plant of Jiangsu Yonggang Group 

Highlight I: All indicators of the heating furnace reach the internationally leading level: oxidation burning loss ≤ 0.6%, energy consumption <260 kCal/kg steel, and decarburized layer <0.2 mm of high carbon steels such as bearing steel. 

Highlight II: The ultra-low nitrogen combustion technology of air regenerative burner and coal gas preheater is innovated, reducing nitrogen oxide emission to NOx < 35 mg/Nm³ (8% O₂). 

High-efficiency Heat Transfer and Energy-saving Roller-hearth Heat Treatment Furnace Technology (Internationally Leading) 

Introduction 

Various high-efficiency heat transfer and energy-saving technologies are combined to reduce the energy consumption and pollutant emission of roller-hearth heat treatment furnaces and improve production efficiency. The project outcomes reached the internationally leading level according to the appraisal by the industry's authoritative experts, and 10 patents have been applied. The technology is applicable to all kinds of heat treatment furnaces for steel plates. 

Typical Project 1: Tempering Heat Treatment Furnaces for Phase III Project of Jiangyin Xingcheng 

Highlight I: The innovative high-speed circulation heating technology for the roller-hearth heat treatment furnace improves the air preheating temperature and heat transfer efficiency. 

Highlight II: The split-type self-preheating burner features a long service life and less maintenance and can reduce nitrogen oxide emission to NOx < 50 mg/Nm³. 

Typical Project 2: All-electric Heating Roller-hearth Furnace for One Factory in Shandong 

Highlight I: The electric heating technology is applied to the roller-hearth steel plate heat treatment furnace for the first time. The power of the electric heating system exceeds 10,000 kW, truly realizing zero emission and remarkable energy conservation. 

Highlight II: The digital pulse control technology for electric heating greatly improves the uniformity of furnace temperature and enables the control of furnace temperature to an accuracy within ±1°C. 

High-temperature Annealing Circular Furnace Technology for High-end Oriented Silicon Steel (Internationally Leading) 

Introduction 

This technology realizes the full localization of high-temperature annealing circular furnace equipment and control technology for high-end oriented silicon steel and eliminates the technical stranglehold on China's producing high-end oriented silicon steel. The high-temperature annealing circular furnace can reach a maximum temperature of 1250°C and adopt nitrogen and hydrogen as protective gases. A total of 8 authorized patents have been obtained for this technology. The technology is applicable to the high-temperature annealing process for oriented silicon steel coils. 

Typical Project 1: Circular Furnace for Silicon Steel Project of WISCO 

Highlight I: It is the first full-localization high-temperature annealing circular furnace for high-end oriented silicon steel in China, and all its performance indicators have reached the internationally leading level. 

Highlight II: With an intermediate diameter of 55 m, the circular furnace supports charging of up to 120 steel coils. It is the high-temperature annealing circular furnace with the largest size and the largest coil charging capacity in China and even in the world. 

Typical Project 2: Circular Furnace for Silicon Steel Project of TISCO 

Highlight I: The prefabricated refractory device replaces the original heat-resistant steel bearing to support steel coils. It has a longer service life and greatly reduces investment and operation costs. 

Highlight II: The protective gas supply device with independent atmosphere control and the in-cover atmosphere sampling device are developed to realize independent adjustment and control of each inner cover's protective atmosphere and improve the process adjustment flexibility. 

Highlight III: A two-level control system is equipped to realize the full automation of the circular furnace production process. 

Annular Solution Heat Treatment Technology of Stainless Steel Coil (Internationally Leading) 

Introduction 

After heat treatment in the stainless steel annular solution heat treatment furnace, the coils' performance indicators reach an advanced level. The technology addresses the problem of large grain gradation differences in coils by off-line solution heat treatment. It successfully breaks through foreign monopolies of heat treatment technology and equipment for stainless steel coils and reaches the world-leading level. 

Typical Project: Annular Solution Heat Treatment Furnace Project of Yongxing Special Materials Technology Co., Ltd.  

Highlight I: The grain gradation difference between points of the coils after solution heat treatment is less than 2 grades. 

Highlight II: NOx emission < 50 mg/m³.