Electrically-Driven Equipment of the Basic Oxygen Steelmaking (BOS) Stage

Purpose and Application

This group includes compressors purposed to remove oxygen-converter gases from various BOS converter capacities after wet cleaning of the gases.

Typical Components of the Machine:

  • centrifugal сompressor with a rotor, foundation frames, tie-rods and base plates;
  • lube oil system;
  • monitoring and protection instruments, instrument transducers;
  • heat monitoring, control, protection and signaling board;
  • compressor mounting and dismounting tools;
  • accessories for lifting and alignment of the rotor and the top section of the compressor body;
  • electrical motor;
  • operating documents.

Basic Advantages

Package-supplies of all machine components manufactured by CJSC “REPH” result in:

lower cost of the basic equipment due to the fact that such equipment is manufactured directly by CJSC “REPH” subsidiaries;

  • application of the up-to-date technical solutions;
  • lower operating cost;
  • reliable operation of all components;
  • earlier equipment delivery dates.

Machine Structure

The machine consists of a compressor, having a welded body and a single double-suction impeller, the lube oil system, the bearings, an electrical motor drive.

Design Features

The group of equipment used for the basic oxygen steelmaking includes the following machine series:10000-11-1, 8500-11-1, 7600-13-1, 7500-13-1, 4500-11-1. A number of the machines (10000-11-1, 8500- 11-1, 4500-11-1) is equipped with a starting frequency converter. The machine is equipped with protective and control devices which ensure its stable operation. The lube oil system of the machine provides forced lubrication of the bearings of the compressor, and the electric motor.

Control of the machine start and stop, and the machine performance monitoring is done from the remote control panel located in the operator’s room.

The machine control panel is equipped with emergency and warning audible signals and lights and process status indicators.


General Structure

The compressors include the compressor itself, the electrical motor drive, the reduction gear, the lube oil system, monitoring, protection, and signaling system and the heat monitoring boards.

Design Features

The compressor is a single-cylinder single-stage machine with the double-suction impellers. The welded compressor body consists of two suction cavities and a volute. The suction branch pipes are directed upward, the discharge branch pipes, sideward. Due to nitrogen gas supplied to the compressor’s end seals, the latter prevent ingress of air into the blading section, and leakage of compressed gas into the mechanical equipment room. A speed-increasing gear is installed between the compressor and the electric motor.