Manufacturing process

Manufacturing process

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Manufacturing Process

Global Steel Wire manufactures steel by recycling scrap, therefore contributing to environmental conservation. Its industrial process, which is completely ecological, uses scrap as its main raw material, melting it down in a steel mill with an electric furnace to obtain steel in the form of a semi-product called billet.

This billet is then transformed in a rolling mill into a wide range of different qualities of wire rod, which are used by our customers to manufacture products such as wires, strands, cables, meshes, steel ropes, springs, cold stamped screws or tyre reinforcement.

We have a PPE (Product and Process Engineering) department dedicated to research and development activities, which allows us to offer the most technologically advanced products – a key aspect in order to be able to compete in increasingly demanding markets.

The manufacturing process is outlined in these 4 steps:

01-materia-prima

1. Raw material: scrap

The metal load of each caster is made up of a mixture of selected scrap and pre-reduced ore pellets in order to obtain the appropriate residual element content according to the type of steel to be made.

The use of pre-reduced ore pellets allows very low levels of residual element content to be obtained, such as: Cr, Ni, Cu, Mo, Sn y N2.

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03-tren-alimentacion

3. Rolling Mill

The process starts when 180 mm. square section billets weighing between 2,500 and 3,100 Kg enter the mill. They are heated in a walking beam furnace, water-cooled (walking beam), with a capacity of 170 Tm/h, with top and bottom heating.

Once hot, they are rolled in a 4-pass roughing mill (horizontal/vertical wire mill), to 140 mm square section billets.

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02-aceria

2. Steelworks

The Steelworks consists of three main facilities:

An electric furnace, where the scrap and other raw materials used in the composition of the steel are melted. The diameter of the tank is 7.2 metres and it has a capacity of 150 tonnes. It has a 140 MVA transformer and the diameter of the electrodes is 600 mm. The liquid steel is poured using the EBT bottom pouring system, which prevents slag from escaping.

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04-tratamientos2

4. Treatments

All our wire rods can be supplied with annealing and/or stripping-coating treatments.

Annealing is carried out in an EBNER furnace with H2/N2 hydrogen atmosphere, following specific processes according to the type of steel.

The annealing processes that can be carried out with these furnaces are as follows:

Keep reading
01-materia-prima

1. Raw material: scrap

The metal load of each caster is made up of a mixture of selected scrap and pre-reduced ore pellets in order to obtain the appropriate residual element content according to the type of steel to be made.

The use of pre-reduced ore pellets allows very low levels of residual element content to be obtained, such as: Cr, Ni, Cu, Mo, Sn y N2.

Keep reading
02-aceria

2. Steelworks

The Steelworks consists of three main facilities:

An electric furnace, where the scrap and other raw materials used in the composition of the steel are melted. The diameter of the tank is 7.2 metres and it has a capacity of 150 tonnes. It has a 140 MVA transformer and the diameter of the electrodes is 600 mm. The liquid steel is poured using the EBT bottom pouring system, which prevents slag from escaping.

Keep reading
03-tren-alimentacion

3. Rolling Mill

The process starts when 180 mm. square section billets weighing between 2,500 and 3,100 Kg enter the mill. They are heated in a walking beam furnace, water-cooled (walking beam), with a capacity of 170 Tm/h, with top and bottom heating.

Once hot, they are rolled in a 4-pass roughing mill (horizontal/vertical wire mill), to 140 mm square section billets.

Keep reading
04-tratamientos2

4. Treatments

All our wire rods can be supplied with annealing and/or stripping-coating treatments.

Annealing is carried out in an EBNER furnace with H2/N2 hydrogen atmosphere, following specific processes according to the type of steel.

The annealing processes that can be carried out with these furnaces are as follows:

Keep reading