Acciaieria Arvedi

Sales and pre-processing notes > Charging the electric arc furnace The furnace is charged mainly with ferrous scrap and with a smaller quantity of solid pig iron and/or sponge iron together with melting materials which consist mainly of lime. > Strips, plates and blanks can be obtained on our finishing lines which include slitters, flattening machines and blanking machines. The service provides the delivery of finished (or semi-processed) products in conformance with the production plans specifically requested by the customers. Melting and Refining The electric arc furnace carries out a melting function through the use of electrical power and the energy coming from combustion and chemical oxidation reactions. Refining of the liquid metal is carried out in the ladle furnace and consists mainly in refining the chemical analysis and centring the temperature. Casting and rolling into coils The liquid steel is cast into a thin slab, immediately reduced in thickness with a still-liquid core, fed directly into the pre-rolling plant (and for ISP cut into intermediate strips). The pre-rolled intermediate strip, the temperature of which is raised by about 150-200°C by an induction heater,is (for ISP collected in the Cremona Furnace and) from here fed into the finishing mill, reduced to the final thickness and subsequently cooled and wound into coils. > Pickling The pickling process, carried out in a hydrochloric acid bath, removes the surface oxide generated during the hot rolling phase and is followed by surface finishing through skinpass and oiling. Galvanising Pre-painting Galvanising, following treatment in the heating furnace with its reducing atmosphere, occurs through immersion in a bath of molten zinc. The material is then finished through a skinpass and flattening machines and then passivated. The painting process develops through an initial surface preparation phase by chemical pre-treatment of the strip followed by the application of the paint using a rolling machine and finally drying in ovens. The summary of constantly developing industrial thinking Acciaieria Arvedi, in parallel with the development of new products, has particularly reinforced its European sales network so as to improve the level of collaboration with customers and has set up a technical engineering service in order to help find new product solutions. Arvedi steel presents itself to the market as an absolutely new product since it is obtained through a highly inno- vative process that is constantly under development and which gives the hot rolled strip unique characteristics and properties that are reflected in real advantages for end users. A team of engineers specially trained for process and product development gives technical assistance to customers so as to realise new projects and are aided by European study and research centres of the high- est level; among these can be cited the Politecnico di Milano and Centro Sviluppo Materiali in Rome (Italy), the Technical University of Aachen - RWTH, the University of Freiberg (Bergakademie), the BFI centre of materials analysis in Düsseldorf (Germany) and Advent (Canada). > > >