OAO CMW’s ROLLING OPERATION is represented by two shops – the New Rolling-Mill Shop (NRM) and the Old Rolling-Mill Shop (ORM).

The rolling operation constitutes the final link in the cycle of producing finished rolled products at the factory.  Roll mills are the main process units in this link. 

The New Rolling-Mill Shop has two mills – the 800 mill and the 370 mill.

The 800 blank production mill was commissioned in 1936 with a designed rolled product output of 283.0 kt/a. 

This in-line type mill consists of 2 three-high rolling stands outfitted with tilting tables and manipulator mechanisms. 

The mill specializes in producing blanks of square and rectangular cross-section intended for the factory's 370, 550, and 250 shape mills. 

The feedstock includes ingots produced at this factory and blooms supplied by other metallurgical enterprises. 

The mill is driven by a 3,150 kW electric motor via a reduction gear and a pinion stand. 

The mill’s furnace equipment includes five continuous reheating furnaces, four of which are single-row, two-zone furnaces, while the fifth one is a two-row, three-zone furnace with a recuperative heat exchanger.  The furnaces are fueled by a mix of natural and blast-furnace gases and oil fuel.  The furnaces are rigged with instrumentation equipment and automatic thermal equipment. 

Five-ton electric bridge cranes are used to lay ingots on the loading table to be fed into the furnace.  Ingots are heated in the furnaces according to the heating rate instructions.  A heated ingot is fed by five bogies to the 1st stand to produce a breakdown bar, which is forwarded to the 2nd stand for final breakdown bar formation.  The breakdown bar proceeds to the hot shears to be cut into bars of specified length.  The blanks are marked, moved onto racks, cooled, sorted, and stacked in the adjustage bay strictly by melts using special pratzer clamps (працер-захватов).  From there, 12 local pool wagons transport the blanks to the 370, 550, and 250 mills. 

Production waste: cutoff pieces are used in the Duplex shop's open-hearth furnaces and scale is used for sinter production at the sinter plant. 

Over the years of its existence, the mill has undergone a major upgrading of equipment, working stand replacement, and re-engineering. 

The 370 semicontinuous-type medium-section mill was built in 1935 by Junkerat (Germany) with a designed rolled product output of 129 kt/a. 

The mill is designed to produce springs 40 to 100 mm wide and 4.5 to 23 mm thick, special shapes, and general-purpose shapes. 

The 99x99 mm and 110x110 mm rolled square blank is used as ingoing material to produce spring strip. 

The mill consists of 7 working stands arranged in 4 trains. 

The first train is a breakdown train, which includes 1 three-high mill stand. 

The second train is roughing train, which includes 4 four-high and two-high mill stands. 

The third train is an edger, and the fourth train is polishing. 

Hot shears are mounted between the first train and the second train. 

The mill’s furnace equipment includes 2 single-row, two-zone reheating furnaces running on a mix of blast-furnace and natural gases, with oil fuel serving as standby fuel.  The furnaces are rigged with instrumentation equipment and automatic thermal equipment. 

Blanks are transported to the reheating furnaces by a 5 ton electric bridge crane, two loading grates, and two transfer electric bogies.  The blanks heated in the furnace are advanced to the mill’s working stands, where they are sequentially processed from the breakdown stand to the polishing stand.  After rolling, the strips arrive at the rack-type cooler, where the strips are cooled and cut into specific lengths.  After cutting, the metal is forwarded to the flattening machine for the strips to be flattened plane-wise.

The metal sorted and accepted by the Quality Control Department is surrendered to the finished product storage. 

Production waste: cutoff pieces are used in the Duplex shop's open-hearth furnaces and scale is used for sinter production at the sinter plant.  Over the last years, when demand for spring strips has significantly reduced, new types of rolled products have been brought under production at this mill, such as Æ 25, 28, 32 mm reinforcing steel, which comply with the international (European) standards.  The reinforcing steel has been certified with Mosstroysertifikatsia (Moscow Construction Certification), Gosstandard (State Standard) of Russia, and Permstroysertifikatsia (Perm Construction Certification).  The spring strips are supplied both to the near-abroad and far-abroad countries.

The Old Rolling-Mill Shop has two mills – the 550 mill and the 250 mill. 

The old rolling-mill shop includes a roll shop built in 1913 and intended to prepare the rollers for rolling for the factory's roll mills. 

The 550 medium-section mill was built in 1883 with a designed output of 120.0 kt. 

The 550 mill makes medium-rolled sections and shape steel-rolled stock.  The range of products includes 43 items used in the construction, machine building, automotive, ship building, and coal industries. 

The square and rectangular blanks complying with the STP 115-1-2002 Enterprise Standard are ingoing materials, supplied from the 800 mill. 

The mill is made up of 3 open-type working stands arranged in one train.  All the three stands are driven by one asynchronous electric motor via a reduction gear and a pinion stand. 

The mill’s reheating furnace is single-row, continuous-working, two-zone with front loading and side unloading of heated blanks.  The furnace is rigged with instrumentation equipment and automatic thermal equipment and runs on a mix of blast-furnace and natural gases, with oil fuel serving as backup fuel.

The blanks are heated in the furnace and fed to the mill one blank at a time, successively going through the mill's working stands. The finished mill products are fed to circular hot cutting saws and cut into specific lengths followed by cooling in the clinker cooler.  The finished mill products are sorted, taken on by the Quality Control Department, faggoted, and forwarded to the finished product storage. 

Production waste: cutoff pieces are used in the Duplex shop's open-hearth furnaces and scale is used for sinter production at the sinter plant. 

The 550 mill’s maximum capacity of 196,087 t/a was reached in 1978. 

The 250 small-section mill was built in 1896 with a designed output of 45 kt. 

The maximum output in 1985 totaled 119,169 t/a. 

This mill rolls section bars, shaped sections, and special shapes, as well as reinforcing steel, with these products used in the automotive industry, machine building, construction, and agriculture. 

The 99x99 mm blank is used as ingoing material to produce rolled products, supplied, primarily, by the 800 mill, as well as by other metallurgical enterprises. 

The mill is made up of 8 working stands arranged in three trains, each of which is driven by an individual electric motor via a reduction gear and a pinion stand.  A hot-cutting shearing press is located between the first and the second trains. 

The mill’s furnace equipment includes a single-row, two-zone, continuous-working furnace.  The furnace is rigged with automatic thermal equipment and instrumentation equipment.  The fuel is a mix of blast-furnace and natural gases, with oil fuel serving as backup. 

The blank heated in the reheating furnace to a specified temperature successively goes through all the three mill trains, gradually turning into a rolled product of specified shape, cut by the hot shearing press. The finished rolled product arrives at the rack cooler and after cooling is cut into specific lengths using cold shears. The final stage includes sorting, examination by the Quality Control Department, packing, and forwarding to the finished product storage.

Production waste: cutoff pieces are used in the Duplex shop's open-hearth furnaces and scale is used for sinter production at the sinter plant.