Technology Directorate

Róbert MÓGER

Chief Metallurgist

+36 (25) 584 180

+36 (25) 583 800

This email address is being protected from spambots. You need JavaScript enabled to view it.

Csaba WITT

Technology Chief Engineer

+36 (25) 583 472

+36 (25) 584 772

This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Pig iron is a Fe based alloy generally having a carbon content of 4-5 percent, containing other elements too and produced by a metallurgical process from iron ores. It is an intermediate product, which is the base material of steel-making. Raw materials required for production: iron ore pellet, sinter, flux, blast furnace coke. Ores are imported mainly from Russia and Ukraine.

The raw materials charged from the top of the blast furnace move down towards the hearth of the blast furnace. Carbon content of the blast furnace coke reacts with the oxygen content of preheated air (1100°C) and burns, and the gas generated in this way flows upwards, heats up and reduces descending ore. Ore (and its gangue) melts in lower zones of the blast furnace due to the high temperature developing owing to the burning of coke, generated melt flows to the bottom part, the hearth of the blast furnace. The manufactured products are hot metal and slag, which are periodically removed from the blast furnace (tapping).

One of the by-products of metallurgical operation is top gas (mainly containing from CO2, CO, N and H) that is used for energy production, boiler heating, and by recycling for preheating of air blown in the blast furnace. Tapped slag in solid condition is used for many purposes, in both the cement and construction industries.

Ores are smelted in two blast furnaces. Blast furnace 1 and blast furnace 2 were commissioned in 1954, respectively in 1957. Then the two blast furnaces were reconstructed several times. Pig iron production capacity of DUNAFERR is 1.3 million tons.