Category Archives: China Steel

Vacuum degassing plant and continuous bloom caster from Primetals Technologies brought into operation for Changzhou Eastran

  • VD twin vessel plant has a capacity of 75 metric tons
  • Objectives are further improvement of the steel quality and reduced working costs
  • Hydrogen content reduced to less than 1.3 ppm and nitrogen to less than 50 ppm
  • Continuous bloom caster produces 800,000 metric tons per annum for automotive applications
  • Dedusting system improves environmental quality

A twin vacuum degassing plant (VD) and a continuous bloom caster supplied by Primetals Technologies have been brought into operation at the Chinese special steel producer, Changzhou Eastran Special Steel Co. Ltd. (Changzhou Eastran). The VD plant has a capacity of 75 metric tons. The vacuum treatment reduces the hydrogen content to less than 1.3 ppm and the nitrogen content to less than 50 ppm. The objective is to improve the steel quality even further. The five-strand continuous caster is designed for an annual production of 800,000 metric tons of steel for applications in the automotive industry. It casts blooms for pipes, spring and bearing steels. A dedusting system improves the environmental conditions on site and the new plants also reduce operating costs. Primetals Technologies received the order at the beginning of 2017.

Changzhou Eastran is part of the Changzhou Eastran Group and operates a plant in the town of Changzhou in Jiangsu Province, Eastern China, producing special steels, including bearing and tool steels. The new plant replaces obsolete equipment.

Primetals Technologies designed all the mechanical and electrical equipment for the VD plant, and supplied core components, including the vacuum pump, filters and gas cooler. The vacuum pump itself was manufactured in Germany and procured from Leybold. The system was integrated in a Leybold workshop in Tianjin.

The five-strand continuous bloom caster is equipped with a curved pipe mold. The machine radius is ten meters and the metallurgical length around 20 meters. It casts high-carbon steels at speeds from 1.05 to 1.5 meters per minute and produces blooms with a square cross-section of 200 x 200 millimeters. Production can be extended to include other rectangular and round cross-sections.

Primetals Technologies was responsible for the basic and detailed engineering, as well as for manufacturing molds, oscillators and segments. Primetals Technologies installed a number of technology packages to ensure not only a trouble-free casting process, but also blooms with high surface and interior qualities. The packages included the DynaFlex mold oscillator and straightening units with DynaGap Soft Reduction. Primetals Technologies also supplied the systems for the basic automation (Level 1). DynaGap Soft Reduction in combination with the Dynacs 3D cooling model enables blooms to be cast from high-quality pipe grades and other upmarket steels. Primetals Technologies also supervised the installation and commissioning of the continuous caster, and trained the customer’s personnel.

Vacuum degassing plant (VD) from Primetals Technologies not bloom caster
Vacuum degassing plant (VD) from Primetals Technologies

Source: Primetals Technologies

Primetals Technologies supplies EAF Quantum electric arc furnace and ladle furnace to Langxi County Hongtai

Electrical energy consumption per metric ton of liquid steel is very low, as are operating costs and CO2 emissions

Primetals Technologies has received an order from Chinese steel producer Langxi County Hongtai Steel Co., Ltd. (Langxi County Hongtai) to supply an EAF Quantum electric arc furnace and a ladle furnace for its plant in Xuancheng, Anhui Province. The EAF Quantum furnace is designed to handle scrap steel of vary varied composition and quality. The electrical energy requirement of the electric arc furnace is extremely low because the scrap is preheated. This reduces both the operating costs and the CO2 emissions. The twin ladle furnace sets the desired steel grades and the correct casting temperature. The new furnaces are scheduled to be commissioned in the third quarter of 2019.

Langxi County Hongtai was founded in 2002. The company’s business includes the manufacturing of steel castings including alloy, bushings, and rolling mill rolls. For the new EAF Quantum electric arc furnace and the twin ladle furnace, Primetals Technologies will supply the complete mechanical and electrical process equipment and the automation technology. This includes the automated scrap yard management, the automated charging process, automation of the oxygen injection and sand refilling, as well as the Level 2 automation which makes the plant ready for Industry 4.0.

The EAF Quantum developed by Primetals Technologies combines proven elements of shaft furnace technology with an innovative scrap charging process, an efficient preheating system, a new tilting concept for the lower shell, and an optimized tapping system. This all adds up to very short melting cycles. The electricity consumption is considerably lower than that of a conventional electric arc furnace. Together with the lower consumption of electrodes and oxygen, this gives an overall advantage in the specific conversion cost of around 20 percent. In comparison to conventional electric arc furnaces, total CO2 emissions can also be reduced by up to 30 percent per metric ton of crude steel.

Source: Primetals Technologies

Wuhan Shunle orders two EAF Quantum furnaces and two ladle furnaces from Primetals Technologies

Chinese steel producer Wuhan Shunle Stainless Steel Co. Ltd. (Wuhan Shunle) has placed an order with Primetals Technologies to supply two EAF Quantum electric arc furnaces and two ladle furnaces for its production site in Hubei Province. The EAF Quantum furnaces are designed to handle scrap steel of varied composition and quality. The electrical energy requirement of the electric arc furnaces is extremely low because the scrap is preheated. This reduces both the operating costs and the CO2 emissions. The twin ladle furnaces set the desired steel grades and the correct casting temperature. The new furnaces are scheduled to be commissioned in the third quarter of 2019.

Wuhan Shunle manufactures and distributes steel products. The company produces screw thread steels, steel wires, steel tubes, carbon steels, alloy steels, stainless steels, and other products. For the new EAF Quantum electric arc furnaces and the twin ladle furnaces, Primetals Technologies will supply the complete mechanical and electrical process equipment and the automation technology. This includes the automated scrap yard management, the automated charging process, automation of the oxygen injection and sand refilling, as well as the Level 2 automation which makes the plant ready for Industry 4.0.

The EAF Quantum developed by Primetals Technologies combines proven elements of shaft furnace technology with an innovative scrap charging process, an efficient preheating system, a new tilting concept for the lower shell, and an optimized tapping system. This all adds up to very short melting cycles. The electricity consumption is considerably lower than that of a conventional electric arc furnace. Together with the lower consumption of electrodes and oxygen, this gives an overall advantage in the specific conversion cost of around 20 percent. In comparison to conventional electric arc furnaces, total CO2 emissions can also be reduced by up to 30 percent per metric ton of crude steel.

EAF Quantum electric arc furnaces from Primetals Technologies
EAF Quantum electric arc furnace from Primetals Technologies

Primetals Technologies, Limited headquartered in London, United Kingdom is a worldwide leading engineering, plant-building and lifecycle services partner for the metals industry. The company offers a complete technology, product and service portfolio that includes integrated electrics, automation and environmental solutions. This covers every step of the iron and steel production chain, extending from the raw materials to the finished product – in addition to the latest rolling solutions for the nonferrous metals sector. Primetals Technologies is a joint venture of Mitsubishi Heavy Industries (MHI) and Siemens. Mitsubishi-Hitachi Metals Machinery (MHMM) – an MHI consolidated group company with equity participation by Hitachi, Ltd. and the IHI Corporation – holds a 51% stake and Siemens a 49% stake in the joint venture. The company employs around 7,000 employees worldwide. Further information is available on the Internet at www.primetals.com.

Source: Primetals Technologies

EU Stainless Steel Prices Forecast to Decline in the Fourth Quarter, Recovery Expected in Early 2019

Guangxi Guixin orders EAF Quantum electric arc furnace from Primetals Technologies

  • Tapping weight of maximum 80 metric tons

  • First application of split tapping process reduces tap-to-tap time

  • Plant concept reduces electrical energy requirement, operating costs and CO2 emissions

  • High degree of automation

The Chinese steel producer Guangxi Guixin Iron & Steel Group Co., Ltd  (Guangxi Guixin) has placed an order with Primetals Technologies to supply an EAF Quantum electric arc furnace for its Hezhou, Guangxi works. The furnace has a tapping weight of 80 metric tons and will replace to smaller existing arc furnaces. For the first time, an EAF Quantum arc furnace features the new split tapping process: Tapping is performed under full power with a tap-to-tap time of just 26 minutes. The furnace has an extremely low requirement of electrical energy, which also contributes to a reduction in both operating costs and CO2 emissions. The high degree of automation, starting from the scrapyard, makes the EAF Quantum ready for Industry 4.0. Commissioning of the new furnace is scheduled for mid-2019.

Guixin Iron and Steel Group Co., Ltd. was established in 1993. The privately owned group comprises companies active in the steel, real estate, port, finance, and trade businesses. Its steelmaking capacity amounted to 8 million metric tons (2017), mainly rebar and wire rod and coil. The production site in Hezhou is EAF based and produces long products.

Primetals Technologies will supply the entire mechanical and electrical process equipment for the EAF Quantum electric arc furnace. This includes the automated scrap yard management, the automated charging process as well as automated oxygen lancing and sand filling as well as level 2 automation, making the plant ready for Industry 4.0. A special feature of the new EAF Quantum is the newly introduced split tapping process. This allows for continuous tapping with smaller but faster heats due to the large hot heel of the furnace and Primetals Technologies´ FAST tapping solution, significantly reducing tap-to-tap times.

Developed by Primetals Technologies, the EAF Quantum combines proven elements of shaft furnace technology with an innovative scrap feeding process, efficient preheating system, new tipping concept for the lower shell, and an optimized tap system to attain significantly reduced tap-to-tap times. The electrical energy requirement is considerably less than that of a conventional electric arc furnace. In conjunction with reduced consumption of electrodes and oxygen, a cumulative benefit of around 20 percent is achieved for respective conversion costs. Overall, reductions of up to 30 percent of CO2 emissions per metric ton of crude steel can be attained when compared to conventional arc furnaces.

electric arc furnace

EAF Quantum electric arc furnace from Primetals Technologies

Source: Primetals Technologies

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Primetals Technologies supplies new Arvedi ESP line to Henan Yaxin

  • Casting-rolling plant produces high-quality, ultra-thin strip to enter new market segments
  • Rolling of reproducible strip thicknesses down to 0.8 mm
  • Total production capacity of 1.6 million tons per year with potential for 2.5 million tons per year
  • Energy consumption and related costs are reduced by up to 45% compared to conventional casting and rolling processes
  • First mini mill combination of Quantum EAF and ESP with major reduction in CO2 and NOx emissions

Chinese steel producer Henan Yaxin Steel Group Co., Ltd. (Henan Yaxin) has placed an order with Primetals Technologies for the supply of an Arvedi ESP (Endless Strip Production) line. The casting-rolling facility will be part of a new steelmaking facility currently under construction in Fuding City, Fujian province . The liquid steel will be produced by two EAF Quantum electric arc furnaces ordered from Primetals Technologies earlier this year.

The Arvedi ESP line has a design capacity of 1.6 million metric tons per year with the potential to produce later 2.5 million tons per year. It is capable of rolling strip to a reproducible strip thicknesses down to 0.8 mm. This will enable Henan Yaxin to produce high-quality, ultra-thin strip to enter new market segments. Compared to conventional casting and rolling processes, energy consumption and the related costs are reduced by up to 45%. This also results in a major reduction in CO2 and NOx emissions, minimizing environmental impact. This is the first environmental friendly mini mill installation worldwide where EAF Quantum and Arvedi ESP are combined. The plant is scheduled to go into operation in 2020.

The privately-owned company Henan Yaxin operates integrated and compact steelmaking plants in five provinces and cities in China, and can produce more than ten million metric tons of steel each year. The Arvedi ESP plant will allow Henan Yaxin to better serve the highly attractive local and export markets for high-quality, thin-gauge strip products. The 180-meter-long plant is far more compact than conventional casting and rolling mills. The new plant is designed for an annual production capacity of 2.5 million tons of high-quality, ultra-thin, hot-rolled strip products with widths of up to 1,600 mm and thicknesses down to 0.8 mm. Carbon steels, high-strength low alloyed (HSLA) grades and dual-phase steels will be produced.

Primetals Technologies is responsible for the engineering of the Arvedi ESP plant and will supply mechanical equipment, media-control systems, technological packages and automation systems. The entire line is controlled by a completely integrated basic (Level 1) and process optimization (Level 2) automation, which fully controls all casting and rolling operations.

In the Arvedi ESP process, hot-rolled coils are produced in a linked casting and rolling plant directly from liquid steel in a continuous and uninterrupted manufacturing process. The line commences with the casting of a thin strand that is subsequently rolled to an intermediate thickness of 8 to 20 mm in a 3-stand high-reduction mill positioned at the end of the caster. After reheating in an induction heater, rolling of the transfer bar to the targeted end thickness is performed in a 5-stand finishing mill followed by laminar strip cooling. Strip cutting is then carried out by means of a high-speed shear immediately prior to coiling to coil weights of up to 32 metric tons. The full range of steel grades can be flexibly produced on Arvedi ESP plants.

As a result of the endless strip-production mode of Arvedi ESP lines, repeated threading into the individual rolling stands is not necessary. This is the basis for the production of ultra-thin strip gauges down to 0.8 mm thicknesses. The tolerance values for the required strip geometry are fully met along the entire length of the rolled product. Endless production is also decisive for assuring the homogeneity of the steel microstructure, grain size, yield strength and tensile strength. Because the strip is continually under tension, the cobble rate is below 0.1%, even when producing more than 50% below 1.2 mm thickness. Yield values exceeding 98% are reached because cropping of the strip head and tail ends is not necessary.

Arvedi ESP plant in operation

Source:  Primetals Technologies

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Fourth Arvedi ESP line from Primetals Technologies started up at Rizhao Steel in China

Casting-rolling plant produces 1.7 million metric tons of high-quality, ultra-thin hot strip

At the Chinese steel producer Rizhao Steel Co., Ltd. (Rizhao Steel), the fourth Arvedi ESP (Endless Strip Production) plant supplied by Primetals Technologies was started up in April 2018. The casting and rolling plant will produce 1.7 million metric tons of high-quality, ultra-thin hot strip with thicknesses of down to 0.8 millimetres and widths of up to 1,300 millimetres. The product portfolio ranges from carbon steel to HSLA (high-strength low alloyed) grades. To cater to capacity shifts of Rizhao´s crude steel production and a change in plant setup, the Arvedi ESP plant was re-engineered for the use of larger ladles as well as for decreased space availability during the ongoing project. The plant features a Through-Process Optimization solution (TPO) and Industry 4.0. The order was placed with Primetals Technologies in 2014.

Arvedi ESP Plant was adapted to changes in crude steel production and space availability during the ongoing project

Rizhao Steel Co., Ltd. (Rizhao Steel), a company of the Rizhao Steel Holding Group, is located around 30 kilometres outside of the port of Rizhao in the south of Shandong province. The company has a production capacity of approximately 15 million metric tons of crude steel. Rizhao Steel’s product portfolio includes hot-rolled coils, wire, rods and small-dimensioned I-beams, which are mainly sold to Chinese customers. The new Arvedi ESP plants enable Rizhao Steel to further expand its production capacities for high-grade thin strip products and production of cold-rolled substitutes.

Plant features Through-Process Optimization solution (TPO) and Industry 4.0

Primetals Technologies was responsible for the engineering of the Arvedi ESP plant and supplied the mechanical equipment, the media systems, technology packages and the automation technology. The casting and rolling lines are controlled with the aid of consistent and integrated basic (level 1) and process automation (level 2). This ensures a finely coordinated interaction of the casting and rolling process. The installed Through-Process Optimization solution (TPO) compromises of the intelligent Through-Process Quality Control System (TPQC), a newly developed Industry 4.0 IT system and Through-Process Know-How (TPKH) modules. The TPO system will continuously monitor and manage product quality by recording all process parameters as well as measured production and product data, starting from the liquid phase up to the final processing lines.

The Arvedi ESP system produces hot strip directly from liquid steel in a continuous and uninterrupted production process in a linked casting and rolling plant. In this type of plant, the power consumption and the related costs are up to 45 percent less than in the case of a conventional plant with separate casting and rolling processes. It also means a significant reduction of CO2 emissions. Furthermore, with a length of only 155 meters, the dimensions of these plants are clearly more compact than those of conventional casting and rolling plants.

Shaking hands in front of the first coil produced on the fourth Arvedi ESP line at Rizhao Steel: Yu Yao, Plant Manager ESP lines, Rizhao Steel; Harald Monn-Weiss, Site Manager Primetals Technologies; Xie Jibiao, Overall Plant Manager ESP Melt shop, Rizhao Steel (from left to right).

Primetals Technologies, Limited

Primetals Technologies, Limited headquartered in London, United Kingdom is a worldwide leading engineering, plant-building and lifecycle services partner for the metals industry. The company offers a complete technology, product and service portfolio that includes integrated electrics, automation and environmental solutions. This covers every step of the iron and steel production chain, extending from the raw materials to the finished product – in addition to the latest rolling solutions for the nonferrous metals sector. Primetals Technologies is a joint venture of Mitsubishi Heavy Industries (MHI) and Siemens. Mitsubishi-Hitachi Metals Machinery (MHMM) – an MHI consolidated group company with equity participation by Hitachi, Ltd. and the IHI Corporation – holds a 51% stake and Siemens a 49% stake in the joint venture. The company employs around 7,000 employees worldwide. Further information is available on the Internet at www.primetals.com.