The steel mill in Kryvyi Rih (Russ. Krivoy Rog) was founded in 1931 on the rich iron or deposits of the Ukrainian Kryvbas basin.
In 1934 the mill was ready to produce hot metal out of one blast furnace. By 1939 three blast furnaces a coke plant and a Bessemer shop were  in operation. In the second world war the Kryvyi Rih Metallurgical Works were dismantled by the Soviets and the remains destroyed by the German army.
In 1949 blast furnace No.1 was blown on. By 1960 four rolling mills and a 600 ton open hearth furnace were installed.
Blast furnace No.7 was built in 1962, No. 8 and No. 9 (one of the largest worldwide) followed in 1970 and 1974.
In 1996 the Kryvyi Rih State Mining and Metallurgical Combine (Krivorizhstal) brought together the metallurgical and the mining activities in the Kryvbas basin.
In 2004 the mill was privatized for the first time to an Ukrainian syndicate.
This was canceled one year later and the second privatisation found the Mittal Steel company as a new owner.
Since 2007 Krivorizhstal is part of the worlds largest steel company ArcelorMittal.
Today ArcelorMittal Kryvyi Rih employs 35000 people main products are billets, bars, rod and wire.
Further viewing.

1:   Light-section mill 250-2
2:   Rod mill 150-1
3:   Light-section mill 250-1
4:   Light-section mill 250-3
5:   Light-section mill 250-4
6:   Light-section mill 250-5
7:   Rod mill 250-3
8:   Blooming mill No.1
9:   Soaking pits
10: Blooming mill No.2
11: Soaking Pits
12. Light-section mill 250-6
13: Wire mill
14: Forge shop
15: Oxygen plant
16: BOF shop (6×160 ton)
17: Open hearth shop (1×550 ton, 1×700 ton)
18: Power station
19: Blast furnace No.8
20: Blast furnace No.7
21: Blast furnace No.6
22: Blast furnace No.5
23: Blast furnace No.1
24: Blast furnace No.9
25: Coke plant (6 batteries)