References

ANDRITZ METALS offers future-oriented technologies in the cold-rolling, thermal treatment, and surface finishing market segments. All required processes come from one supplier – from engineering to start-up. The performance packages cover complete lines as well as special machines. A selection of some highlight projects is provided below.

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Modernization of the 20-high reversing mill at Hyundai Bng Steel

The 20-high reversing mill at HYUNDAI BNG STEEL underwent extensive modernization by ANDRITZ Sundwig. The complete control electronics were exchanged and now reflect state-of-the-art equipment. Furthermore, the main drives were replaced and designated drive motors completely overhauled. A modular and digital control system, consisting of automatic thickness, strip shape, and strip tension controls, as well as new spray plates with nozzles is now being used.

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Modernization of a 20-high reversing mill at HUGO VOGELSANG GmbH & Co. KG

The 20-high reversing mill at HUGO VOGELSANG GmbH & Co. KG was modernized extensively by ANDRITZ Sundwig. The entire control electronics now comply with the latest state of the art. In addition, the drive and control systems were completely renewed and all the drive motors overhauled. Following modernization, strip thickness variations of 1-2 µ and flatness deviations of 4-6 I-units are now achieved.

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Jindal stainless steel plant, hot annealing and pickling line

Jindal Stainless Limited (formerly JSL Stainless Ltd.), part of the O P Jindal group, is India’s largest and only fully integrated stainless steel manufacturer. ANDRITZ supplied a hot annealing and pickling line and a cold annealing and pickling line. After completion of expansion work, Jindal’s stainless steel capacity will be about 2.5 million tons per annum.

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Salem Steel Plant, hot annealing and pickling line, India

Salem Steel Plant, a special steel unit belonging to the Steel Authority of India Ltd., pioneered the supply of wider stainless steel sheets/coils in India. The plant can produce annealed and pickled austenitic, ferritic, martensitic, and low-nickel stainless steel strip from hot and cold rolled material. In September 2008, the “Salem Steel Expansion Project”, including the ANDRITZ METALS annealing and pickling line, was inaugurated by Prime Minister Mammohan Singh, Congress President Sonia Ghandi, and Steel Authority of India Chairman S.K. Roongta.

Hot rolled annealing and pickling lines

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Dillinger Huettenwerke, roller hearth furnace

This type of heat-treatment furnace is a roller hearth furnace with upper and lower heating. During transport through the furnace, the incoming plates are heated from the charging temperature up to the final temperature. A roller bed is used to charge and empty the furnace. The roller hearth furnace is 79.9 m long, 5 m wide, and 1.35 m high.

Continuous furnaces

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Jiangxi Copper, Guixi Smelter, tilting furnace

Supply of a tiltable reverberatory furnace. This type of furnace is used for melting and refining of different types of copper scrap. At Jiangxi Copper, it is used for the production of anode copper, but FRHC copper and other copper qualities can also be produced from copper scrap by fire refining.

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JSC Tagil Iron and Steel Works, car bottom pusher-type furnace

Supply of a heat treatment plant for high-speed railway wheels (designed for the heat treatment of 100 wheels per hour in relation to the reference wheel). The furnace plant is designed as a car bottom pusher-type furnace.

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Mopani Copper Mines, drum-type anode furnace

Supply of two 400 t drum-type anode furnaces used for the production of anode copper from blister copper, charged using a ladle and an overhead crane. The anode furnace is equipped with a heavy oil/diesel burner system and a refining system using compressed air and diesel for oxidation and refining.

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Ofar S.p.A, shaft furnace

Supply of two shaft furnaces (furnace height 16 m) for hardening and tempering of shafts with a maximum weight of 160 t. The shafts have a diameter of 2,500 mm and a length of 16 m. This vertical tempering furnace is a special construction, equipped with a loosely hanging furnace segment that closes the furnace housing like a door (using pneumatic cylinders) and enables charging of the material from the side.

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Boehler Edelstahl, rotary hearth furnace for the heating of ingots

Supply of one rotary hearth furnace for heating ingots. The furnace output is 18 t/h. The ingots are charged horizontally and heated from charging to forging temperature as they are conveyed through the furnace. The ingots are transported through each furnace by rotating the ceramic furnace hearth. The furnace is designed to heat ingots of different lengths and diameters in one or several rows.

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Schwermetall, copper shaft furnace

Supply of a shaft furnace to Schwermetall Halbzeugwerk, used to increase the plant capacity by installing additional melting capacity to melt copper cathodes and high-purity copper scrap. Additionally, it reduces the plant’s operating costs as a result of the lower melting costs for the shaft furnace compared to traditional induction furnaces. Melting capacity: 15 t/h.

Furnace systems for the copper industry

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Vallourec & Mannesmann Tubes, revamping of a rotary hearth furnace

Revamping of the existing rotary hearth furnace at the Vallourec & Mannesmann Tubes plant in Düsseldorf. This furnace is designed for heating ingots from a temperature of 20 °C to a maximum of 700 °C. The main feature in revamping of the existing furnace was the conversion of a large part of the existing combustion system to a heating system with regenerative burners in order to reduce energy consumption and increase the furnace output from 130 t/h to 149 t/h.

Continuous furnaces

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Boehler Schmiedetechnik, rotary table furnace

Supply of a rotary table furnace for heating of ingots and billets. The rotary table furnace is heated with natural gas and designed with conventional heating, i.e. central recuperator. The ingots are charged horizontally and heated from charging to forging temperature as they are conveyed through the furnace.

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DanSteel A/S, double walking beam furnace

Supply of a double walking beam furnace for normalizing of high-grade heavy metal plates. This double walking beam furnace is a special design of walking beam furnace with a maximum average throughput of 26 t/h. The furnace is 35 m long and has a maximum temperature of 1,050 °C. The material is transported by a ceramic lifting system with high precision to guarantee almost scratch-free transport of the plates.

Continuous furnaces

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Saarschmiede, car bottom forging furnace

Supply of a car bottom forging furnace with regenerative heating for ingots. The heating system was designed with regenerative burner technology in order to achieve a reduction in energy consumption and an increase in the furnace capacity. Furthermore, the emissions of the plant will be reduced considerably. The plant is fired with 2 x 15 pairs of regenerative burners, which are arranged horizontally on two levels and placed opposite each other in the side walls.

Batch-type furnaces

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Boehler Edelstahl, supply of two double-chamber furnaces (with steel bars as final product)

The main feature of this special furnace design is that one double-chamber furnace consists of two chamber furnaces which are placed one on top of the other. The high-temperature furnace for hardening is placed at the bottom and the low-temperature furnace for tempering on top of it. This construction facilitates transport of the annealing material into the corresponding quenching baths.

Batch-type furnaces

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Aurubis AG, top blown rotary converter

The TBRC for the Aurubis plant in Hamburg is used for melting and refining of the dried anode slime from tank house operation to produce raw silver for further precious metals production. Capacity 30-40 t.

Furnace systems for the copper industry

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voestalpine Stahl, continuous galvanizing line no. 5, Austria

Commissioned at the end of 2009, this line produces steel strip mainly for the automotive industry. The furnace is composed of highly sophisticated technological equipment, such as a direct-fired furnace and a differential rapid jet cooling system. The annual capacity is around 400,000 tons per annum, with a maximum speed of 350 m/min.

Continous galvanizing lines

Continuous galvanizing lines furnaces

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Tianjin Ansteel Tiantie, continuous galvanizing line, China

The CGL furnace is built for steel sheets 700 to 1,250 mm wide and 0.25 to 1.6 mm thick. The process section speed is 180 m/min, and the furnace has a capacity of 320,000 tons per annum. In addition, the furnace uses special technology that allows the customer to have the flexibility of running the CGL as well as a CAL.

Continous galvanizing lines

Continuous galvanizing lines furnaces

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voestalpine Stahl, coil coating line no. 2, Austria

ANDRITZ METALS supplied a coil coating line for the production of organically coated steel sheets with a strip thickness of 0.4-2.0 mm and a strip width of 700-1,850 mm. The capacity is around 200,000 tons per annum. Commissioning began at the end of 2003.

Color coating lines

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voestalpine Stahl, hot-dip galvanizing line no. 4, Austria

The furnace in hot-dip galvanizing line no. 4 enables the customer to manufacture the latest high-strength steel grades and galvanize the strip with the best surface quality. ANDRITZ METALS supplied the mechanical equipment for the entire strip transport. The line went into operation in April 2007. The capacity is around 450,000 tons per annum, with a maximum speed of 350 m/min.

Continous galvanizing lines

Continuous galvanizing line, furnace section

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Salem Steel Plant, coil preparation line, India

The complete mechanical equipment and the entire plant layout were planned and executed with Solid Edge software. The line went into operation in August 2009.

Coil preparation lines

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Svenskt Stål AB (SSAB), revamping of a continuous annealing line, Sweden

The first revamp increased the cooling capacity with installation of the rapid jet cooling system. The second revamp increased the customer’s ability to cool the strip at very high speed thanks to an additional combination zone for heating/cooling. The annual capacity of the furnace is now 500,000 tons per year at 950 °C maximum.

Continuous annealing lines

Continuous annealing lines furnaces

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Tianjin Ansteel Tiantie, continuous annealing line, China

This continuous annealing line produces a wide range of steel sheets used for household appliances and the automotive industry. The ANDRITZ furnace control and mathematical model system optimizes operations. The line capacity is 730,000 tons per annum for a strip width of 700 to 1,600 mm and a thickness of 0.25 to 2 mm. The process speed can be up to 420 m/min.

Continuous annealing lines

Continuous annealing lines furnaces

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Tezcan continuous galvanizing line, Turkey

The furnace consists of a direct-fired furnace and a small radiant-tube furnace section. This allows the customer to produce a very wide range of products with thicknesses of 0.25 mm to 3 mm and widths of 800 to 1,300 mm at a maximum speed of 200 m/min.

Continous galvanizing lines

Continuous galvanizing lines furnaces

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