Diler Iron and Steel Industry and Trade Inc., a part of Diler Holding and a leading Turkish company specialising in wire rod coils for automotive applications, has ordered a new bell-type annealing plant from Danieli Olivotto Ferrè, for heat treating coils in a protective atmosphere.

The new plant, which will be supplied and installed by Danieli Olivotto Ferré at the steelmaker’s plant in Dilovası, Kocaeli (Turkey), is designed mainly for spheroidising annealing of coiled rods with outside diameters ranging from 1,250 mm to 1,400 mm, wire diameters from 4.5 mm to 27 mm, and will accommodate charges stacked up to 1,900 mm high (charge weights will range from 1,650 to 2,350 kg).

The plant will process coils under a protective nitrogen atmosphere and will consist of three bases designed for a maximum workload capacity of 40 tons, plus two bell furnaces and a cooling hood. The useful workspace volume for both diameter and height is 4,000 mm: large dimensions allow each base to load stacks of up to seven coils, ensuring the highest production flexibility and charge configuration.

According to Danieli, performances will be guaranteed by a high-convection system: each base will be provided with a powerful centrifugal fan capable of recirculating up to 190,000 m3/h of annealing atmosphere. These characteristics, claims Danieli, together with a perfect sealing system for each base, will allow the plant to heat treat 25kt/yr while adhering to the highest technological standards required by the market. Annealed coils will exhibit no additional visible decarburisation (NO-AVD, as per EN-ISO3387) and the spheroidisation rate will be ≥95% (as per SEP1520, PA3.2).