Tag Archives: Steel Mill

SMS Group High-Speed Wire Rod Mills at Guangdong Guoxin

Chinese Guangdong Guoxin Industrial Co., Ltd. has awarded SMS group the Final Acceptance Certificate after successful commissioning of the two single-strand wire rod mills for its Jieyang works, Guangdong province.

Smooth commissioning and safe operation

The works is designed for an annual capacity of 1.4 million tons (700,000 tons per year per wire rod mill). The two single-strand high-speed mills roll wire rod in diameters from 5.5 to 25 millimeters and rebars in diameters between 6 and 14 millimeters. The originally planned rolling speed of up to 105 meters per second has been exceeded; wire rod sizes have already been rolled at speeds of 120 meters per second. The steel grades to be rolled comprise cold-heading, alloyed, spring and stainless steels as well as tire cord and welding wire.

SMS group supplied the high-speed area mechanical equipment starting from the four-stand pre-finishing mill, shear system in front of the finishing block, 6+4-stand finishing block arrangement, pinch roll, loop laying head and all related water boxes. Due to the well proven 6+4-stand arrangement, all final dimensions can be finish-rolled in a maximum of four passes and thus be rolled thermomechanically, i.e. at low temperatures and with close dimensional tolerances.

Besides the mechanical equipment, SMS group provided the electrical and automation system for the complete line (including motors, drives and sensors), and was responsible for the supervision services for erection and commissioning.

SMS group is a group of companies internationally active in plant construction and mechanical engineering for the steel and nonferrous metals industry. It has some 13,500 employees who generate worldwide sales of more than EUR 3 billion. The sole owner of the holding company SMS GmbH is the Familie Weiss Foundation.

Source: SMS Group

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Continuous bloom caster and long-product rolling mills from Primetals Technologies started up at Hyundai

  • Installations are part of Hyundai’s new special steel mill in Dangjin
  • Continuous caster produces 1.1 million metric tons of blooms per year
  • 200th application of monitoring system Mold Expert
  • Large bar mill produces annual total of one million metric tons of end products and billets for the small bar and wire rod mill

In October 2015, a continuous bloom casting machine, a large bar rolling mill and a small bar and wire rod mill supplied by Primetals Technologies were started up at the new special steel mill of Korean steel maker Hyundai Steel in Dangjin. The caster is designed to produce 1.1 million metric tons of blooms per year. It features the 200th application of the monitoring system Mold Expert. The large bar rolling mill produces one million metric tons of end round products as well as billets for the small bar and wire rod mill. The order had been awarded to Primetals Technologies in early 2014. Both caster and large bar rolling mill were started up almost a month ahead of the scheduled date.

Hyundai Steel, situated in Incheon and Seoul, South Korea, belongs to the Hyundai-Kia Automotive Group and runs six production facilities in South Korea and a further one in China. At present, the company is constructing a new plant at the Dangjin site to produce special steels for the automotive industry. In future, bar and wire are to be produced here as primary material for engine and gearbox parts. Annual production of 400,000 metric tons of wire rod and 600,000 metric tons of straight bar and bar-in-coil is planned.

The four-strand continuous bloom caster from Primetals Technologies has an annual capacity of 1.1 million metric tons. The caster is equipped with mold-monitoring system Mold Expert. In combination with air mist spray cooling and interior-cooled rollers in the strand guidance system, further technology packages ensure uniformly high quality of the blooms cast. Still hot, these are then fed for direct use in the bar line. This saves energy during reheating and improves operating safety because there is no need for transport of blooms, for example by crane.

The large bar mill encompasses a duo reversing breakdown stand and a finishing train with rolling/sizing stands. The large bar mill also provides billets to be further processed in the small bar and wire rod mill, which Primetals Technologies also supplied. This combination mill has a capacity of 800,000 tons and is designed to roll 160 tons per hour. It includes a continuous roughing and intermediate mill feeding a sizing block supplied by Germany-based Friedrich Kocks GmbH & Co KG for production of bars, a rod outlet with a rod Reducing Sizing Mill (RSM) and also a bar-in-coil (BIC) outlet. Both the rod and BIC outlets have slow and fast cooling capability. The small bar and wire rod mill has the highest production rate for a combination mill, and is particularly designed for low-temperature rolling. This improves the metallurgical structure and mechanical properties of end products and enhances flexibility during the rolling operation.

Special mechatronics packages and an integrated automation solution ensure the necessary high product quality throughout the plant.

Source: Primetals Technologies

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Revamp with lamella converter suspension systems from SMS group increases yield

SSAB Luleå makes itself fit for the future with a revamped converter shop and Ecoplants facilities from SMS group
At SSAB Luleå, Sweden, SMS group has successfully commissioned the modernized converter shop and the pertaining environmental technology. SSAB fully achieved its own target of increasing the yield of both converters and satisfying the high environmental standards demanded.

Kurt Lindqvist, Project Manager of the Converter Shop at SSAB Luleå, is highly satisfied with the performance of SMS. “The proven technology of SMS provides very good results. Furthermore, the cooperation and communication during the erection and commissioning went very smoothly in an atmosphere of strong team spirit.”

SMS group supplied two converter vessels with lamella suspension and the tilt drive systems. The two-motor tilt drive systems are easily accessible and very maintenance-friendly. The scope of supply also included the converter trunnion bearings, the height increase of the existing trunnion pedestals, and the installation of the vessels and trunnion rings.

Thanks to the design concept developed by SMS group, the new converter vessels have become significantly larger: With an unchanged quantity of charge material of up to 130 tons, the internal volume of the converter has been increased by 10 percent. The additional capacity enables more environment-friendly process control and efficient energy recovery.

This increase in capacity was achieved by improved utilization of the existing installation space. This was possible thanks to the lamella converter suspension system developed and patented by SMS group. It is a maintenance-free converter suspension system designed for arranging the converter vessel in the trunnion ring without restraint.

The converters are well prepared for the thermal loads thanks to the use of the lamella suspension system, along with the design of a larger clearance and the use of high-grade heat-resistant fine-grained structural steels. This is achieved without any additional cooling fluids; sufficient cooling is ensured merely by the natural thermal conditions.

SMS group\’s Ecoplants solution comprised the revamp of the primary gas cooling system of the BOF steelmaking plant. For this, the cooling stacks of both converters were modified and provided with easy-to-maintain SMS group Baumco adjustable skirts. These are lowered hydraulically onto the converter mouth during the blowing phase and they enable the primary gases to be extracted efficiently under suppressed combustion. In addition, diffuse dust emissions are substantially reduced. Gas recovery is used in the best possible way by generating CO gas under suppressed combustion.

The SMS group scope of supplies and services included the revamp of the primary gas cooling system as well as the engineering and supply of the major cooling stack components. These incorporate the adjustable skirts with labyrinth seal and the modernization of the inlet section leading into the scrubbing tower for further flue gas cooling.

The steam produced in the cooling stacks is used as process steam in the entire integrated iron and steel plant. The complete energy recovery from the two cooling stacks is thus performed with extremely high energy efficiency.

“We are highly satisfied with the Ecoplants technology and we have a clean environmental conscience as regards production,” is the opinion of Kurt Lindqvist, Project Manager of the Converter Shop at SSAB Luleå.

SSAB is Scandinavia’s largest producer of flat steels.

Source: SMS Group

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Quick-change RH plant from SMS Mevac successfully started up in South Korea

Hyundai Steel successfully commissions RH plant for the production of automotive grades
With the support of SMS Mevac (www.sms-mevac.com), Hyundai Steel Co. (Hyundai), based in Seoul, South Korea, has successfully commissioned the quick-change RH plant (Ruhrstahl Heraeus process) added to its secondary metallurgy facilities in Dangjin. The first melt was treated on Monday, October 5, 2015, approximately one month ahead of schedule. Already at this point, both Hyundai Steel Co. and SMS are very satisfied with the performance of the RH plant and with the commitment of all parties involved in the project.

The quick-change RH plant had been designed for the treatment of ladles with a nominal heat weight of 155 tons and an average production capacity of 1.2 million tons per year. Technical features of the plant include a hydraulically actuated ladle lifting system, a burner lance and a vacuum alloying system for adding ferroalloys under vacuum. Already in the engineering phase, the capacity of the plant was increased to 175 tons.

A four-stage steam-ejector vacuum pump system of the latest state of the art generates the vacuum. The system has been fitted with advanced pressure control technology which ensures an optimized process.

The RH plant is part of the existing electric steel mill. The steel treated in the RH plant is continuously cast into blooms and processed into high-alloyed quality parts, primarily for use in the automotive industry.

The scope of supply comprised the basic engineering and parts of the detail engineering, the delivery of key components such as the burner lance, the hydraulic system, etc. (the existing steam-ejector vacuum pump system was successfully modified) and supervision of installation and commissioning.

Source: SMS Group

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U. S. Steel And USSC Reach Critical Agreement On Operations

Includes provisions regarding plant loading of critical automotive products

PITTSBURGH, Oct. 9, 2015 /PRNewswire/ — Today, United States Steel Corporation (NYSE:X) announced that the Ontario Superior Court of Justice has approved a mutually agreed upon transition plan with U. S. Steel Canada (USSC) as part of USSC’s restructuring under Canada’s Companies’ Creditors Arrangement Act (CCAA) process.  The agreement is an important step in separating the two parties.

Highlights of this agreement include:

  • U. S. Steel will not be generating any sales on behalf of USSC;
  • Going forward U. S. Steel will load its production on its U.S.-based mills;
  • U. S. Steel shall transition away from providing any technical and engineering services associated with product development or sales with USSC, and U. S. Steel will not support any field quality claims made against USSC;
  • U. S. Steel will continue to provide all shared services that USSC relies upon for up to 24 months, with the exception of sales;
  • Should USSC enter into a new sale and restructuring process (SARP) in the future, U. S. Steel will not be a bidder.On Sept. 16, 2014, USSC’s board of directors unanimously decided to apply for relief from its creditors pursuant to Canada’s Companies’ Creditors Arrangement Act.  As a result of the 2014 CCAA filing, USSC and its subsidiaries were deconsolidated from U. S. Steel’s financial statements on a prospective basis.  Despite efforts in the months following the CCAA filing, no negotiated or other settlement was achieved.

Prior to the Sept. 2014 CCAA filing, USSC recorded a loss from operations in each year for five years, with an aggregate operating loss of approximately $2.4 billion, or in excess of $16.00 per diluted share, since December 2009.  Additionally, USSC represented approximately $1 billion of U. S. Steel’s consolidated Employee Benefits liability as of June 30, 2014.

United States Steel Corporation, headquartered in Pittsburgh, Pa., is a leading integrated steel producer and Fortune 200 company with major production operations in the United States and Europe. The company manufactures a wide range of value-added steel sheet and tubular products.  For more information about U. S. Steel, please visit www.ussteel.com.

SOURCE: United States Steel Corporation

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Primetals Technologies to modernize electric arc furnace for N.T.S. in Thailand

  • Installation of RCB system, new electrode control and
  • Foaming Slag Manager
  • Electrical energy consumption reduced by four percent
  • Shorter tapping times increase productivity by five percent
  • Electrode consumption cut by up to 17 percent

N.T.S Steel Group Public Company Limited has awarded Primetals Technologies an order to modernize its electric arc furnace in Chonburi, Thailand. The furnace will be equipped with a new electrode control system, the Foaming Slag Manager and a refined combined burner (RCB) system. These measures are intended to reduce the electricity and electrode consumption of the electric arc furnace. The hydraulic system for the electrode lifting columns will also be modified under the project which is scheduled for completion in December 2015.

N.T.S. is a subsidiary of Tata Steel (Thailand) Public Co. Ltd., and specializes in the production of steel rod and wire for the construction industry. The liquid steel is produced in an electric arc furnace, which has a tapping weight of 76 metric tons. The installation of the RCB system, the new electrode control and the Foaming Slag Manager from Primetals Technologies will reduce the consumption of electricity per metric ton of steel by four percent and electrode consumption per metric ton of steel by seventeen percent. At the same time, reduced tapping times will increase the productivity of the electric arc furnace by five percent. Deployment of the Foaming Slag Manager allows for actively controlling the height of the foaming slag which, in turn, optimizes the input of electrical energy into the steel bath. In future, electrode control will be handled by the arc control optimizing system (Arcos) from Primetals Technologies. Using an industrial PC as a platform, Arcos has self-adapting algorithms, and makes melt profiles available automatically. This not only cuts energy consumption, but also makes the melting process more efficient. Process stability is also enhanced by continuously monitoring a range of parameters of the electricity supply system. Under the project, Primetals Technologies will also modify the hydraulic system of the electrode lifting columns by fitting new control valves to ensure optimum operation of the Arcos control system.

The electric arc furnace of N.T.S. Steel Group Public Company Limited in Chonburi, Thailand will be modernized by Primetals Technologies (Photo courtesy of N.T.S.).

This press release and a press photo are available at www.primetals.com/press/

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