The blast furnace plant had four blast furnaces. At that time, the operation of two blast furnaces with an annual production capacity of over 2 million tons of pig iron was sufficient to meet the requirements of pig iron customers. The bulk of the production of liquid pig iron was consumed by plant 13 – Steelworks; approximately 3.5% of pig iron production was reinforced on a casting machine, in several assortment classes according to customer requirements for the chemical composition of these solid steel or foundry pig irons. The smallest part of the production (about 0.5%) was intended for the foundry of Liberty Engineering Products Ostrava s.r.o.

Blast furnace ore charge was primarily provided by sintering of dust ores in its own plant 121 – Agglomeration; the remaining part of the charge consisted of pellets, lump ores and also secondary raw materials. Blast furnace coke was supplied by the neighboring plant 10 – Coke Plant; part of the metallurgical coke and other fuels were purchased from external sources.

In addition to the production of pig iron and agglomerate, which was only for own consumption, products from blast furnace slag were sold to external customers, namely slag aggregates in several granulometric grades produced mainly for construction purposes and blast furnace granulate for further processing in cement and glassworks.

The assortment of pig iron and slag products met the requirements of ČSN EN ISO 9001, 14001, 45001 and 50001 standards and was regularly certified annually by an external certification company (TUV NORD, Bureau Veritas, etc.). The certification body confirmed the conformity of the quality management system for the production and supply of steel and foundry pig iron and blast furnace slag products with the ČSN EN ISO 9001 standard.