Sinarsky Pipe Works (Production process)

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Pipe Casting Shop No 1 (TL-1)

The first products were turned out in January, 1936. At present, the pipe casting shop manufactures cast-iron funneled pipes for pressure pipeline systems.

Range of pipes:

  • pipes, nominal dia Dy 100, 150, 200, 250, 300 mm, centrifugal-cast;
  • pipes, nominal dia Dy 400, 500, 600, 700, 900, 1000 mm, semicontinuous-cast.

Production process includes:

  • mixture preparation;
  • metal smelting in cupola furnaces;
  • liquid metal casting in drum ladles;
  • semi-continuous or centrifugal casting of pipes;
  • pipes annealing (centrifugal casting);
  • pipes finish, protective coating application.

The shop has a cast iron inoculation bay where cast iron is treated with magnesium to produce spherulitic iron. In the course of the modification process, cupola iron at t = 1300 to 1320 oC is poured out to an individual channel mixer, in which it is heated to t = 1450v1500 oC, then poured out to a converter ladle and conveyed to the modification chamber, where a weight of magnesium ingot is added. After the reaction termination, at metal pouring to the drum ladle, modifier of ferrosilicon ФС-75 is fed to the pouring stream. Further the drum ladle is transported to the casting machines.

The date July 31, 1997 marks the first heat received at a newly organized bay of permanent-mold electroslag casting. The process involves permanent casting with electroslag remelting (PESR). At the PESR bay, metal is prepared at a temperature of 1400 to 1670 oC with remelting of an expendable electrode made from used tools and metal scrap under slag in an open crucible ladle, and poured out in molds.

The process of steel and alloys remelt goes in fluid chemically active electrically conducting slag as electric current passes through it.

Equipment of permanent-mold electroslag casting bay:

  • ЭТЛ-0,5И1 electroslag casting unit;
  • welding station;
  • molds heating station;
  • flux preparation station;
  • two 2-ton monorail hoists;
  • 7-ton crane.

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