Reconstruction of gas-purification system and ladle–furnace unit at PAO Severstal’

Abstract

The gas-purification system for shaft electrofurnace 1 and ladle–furnace unit 1 at PAO Severstal’ have been reconstructed by specialists from Energostal’ Ukrainian Scientific and Technological Center. For the first time in the world, large electrofilters have been replaced by bag filters with pulsed regeneration (total filtration area 33000 m²). The influence of dust deposits from the furnace in various smelting periods on the dust concentration in the atmosphere of the working zone has been studied. The waste gases and unorganized emissions are completely removed from the furnace, with guaranteed atmospheric levels in the working zone that do not exceed the background concentrations by more than the maximum permissible concentration (1 kg/m³) and residual dust concentration of 3–5 mg/m³ at the smokestack.