Relining of the blast furnace 5 took place from December 2009 to the middle of March 2010. This meant that, for the first time in the history of voestalpine, a major repair was carried out during the winter months, with temperatures down to -14°C. For this reason, the construction site inside the furnace had to be heated. In addition to furnace 5, furnace 6 was already relined in 2009 and has now been in operation again since September 2009. The two small furnaces now offer a total annual capacity of approximately 1.6 million tonnes of crude steel, which is about half the capacity of the large blast furnace A. Total investments for rebuilding the small furnaces amounted to around EUR 30 million.
Replacing the converters in the LD steel plant 3 was carried out in three phases, each lasting 1.5 months, between Spring 2009 and Winter 2010. With the steel plant continuing its operation during the replacement works, this process can be compared to the replacement of a car engine’s cylinder, with the engine running at the same time. In order to increase the annual capacity to 6 million tonnes, the new converters have a tap weight of 177 tonnes each, compared with their former 158 tonnes for each converter. Total investments for replacing the three LD converters amounted to around EUR 40 million.
The new hot dip galvanizing line 5 constitutes the last investment project from the investment program ‘Linz 2010’, which has now been completed with the commissioning of this plant. This plant focuses on the production of steel sheet with superior surface quality and the coating of new high-strength steels for the automotive, construction and home appliance industries. As a special feature, this new galvanizing line offers not only a coating capability using zinc but also one for both zink-iron and zinc-aluminium-magnesium. The capacity of the plant is approximately 400,000 tonnes per annum. Total investment for galvanizing line 5 has been approximately EUR 140 million.
The largest investment completed during the past business year has been the construction of the new power plant block 07, amounting to a total investment of EUR 160 million. This new construction project became necessary, due to the production of 6 million tonnes crude steel resulting in a much higher generation of gas which will be used in the company’s own power plant for generating electricity. The generating equipment in the power plant is supplied with gas from both the coking plant and from the pig iron and crude steel production. In exceptional situations, the power plant can also be run on natural gas. With the new power plant block 07 in operation, external sourcing of electricity can be reduced significantly. In future, voestalpine will generate 90 per cent of the electricity requirement for the Linz site in its own power stations. The power plant block 07 offers a capacity of 164 megawatts. The total installed capacity at the voestalpine power station in Linz is more than 300 megawatts, corresponding to the energy consumed by 300,000 average households.