Dedusting Unit
In order to reduce air pollution and comply with environmental requirements, Natanz Iron Smelting Complex has installed a dust collector system with a nominal capacity greater than the amount of gas and dust coming out of its steelmaking furnace. The summary of the deducting system’s performance is as follows:
During the preparation of melting in the furnace, dust and various gases are created, and these dusts, along with fire and heat, are created in the first stage by Bosterfen and through the exhaust.elbow) are connected to the ceiling of the suction furnace. The suctioned dust enters the settling chamber in the first stage (settling chamber) will be In this room, the inner wall of which is made of firebrick and also covered by hydrothermal panels, the primary cooling work and also the settling of heavy particles are done.
After partial settling, suction the dust fan booster to the mother fan assembly (FDC Fan) which is composed of 10 air suction fans, which, in addition to re-cooling, settles the dust particles to be transported outside. After cooling in FDC Fan Dust enters the mixing chamber through the booster fan. In this chamber, in addition to the dust produced by the suction of the booster fan, the dust produced in the LF, which is sucked by a fan installed above the LF, as well as the dust from the ceiling of the hall enter this chamber. In this chamber, the last stage of sedimentation takes place and dust particles and heavy soil are collected and emptied in the silo.
The dust that has been cooled to a great extent and all its coarse particles, including soil, iron oxide and also its polluted dust, is taken by the main fan and drawn towards the Bag house, which consists of 7300 filters and its height is 6 meters.
The dust particles attached to the filter are separated from the filter by the pulse valves and the wind jet, and are discharged into the hopper, and from there it is transported to the dust transport truck by the conveyor belt.It should be mentioned that according to the latest environmental assessments, the dust output from the main chimney is 120 mg/cm3, which is within the standard and appropriate range compared to the permissible limit (160 mg/cm3).