Why pulverized coal is used in blast furnace?
Pulverized coal is an important auxiliary fuel used in the BF ironmaking. When the pulverized coal is injected into the BF through blowpipes and tuyeres, the coal is a source of heat and a reductant, because of the reactions of devolatilization, gasification, and combustion as well as the formation of unburned char.
What are PCI stands for in steel industry?
Pulverized Coal Injection for Blast Furnaces (PCI)
Is used in steel plant?
It contains about 93-94% Iron (Fe) and other elements/impurities like Carbon (4%), Silicon (~1%), Manganese (+1%) Sulphur, Phosphorus etc. Hot metal is the primary input for production of steel in the Integrated Steel Plants.
How is pulverized coal used in steel making?
Pulverized Coal Injection (PCI) coal. Used in steelmaking, but it is not indispensable like met coal. It is a softer, non-coking coal which is pulverized and injected into the blast furnace to supply heat, which in return reduces energy use and emissions.
How is pulverized coal injected into a blast furnace?
The injection system pneumatically transports and meters the pulverized coal from the storage bin through the injectant vessel, where it is pressurized up to or above the BF pressure, to the tuyere injection lances. The lances inject the coal in equal amounts through the tuyeres, which are arranged symmetrically around the circumference of the BF.
Which is the best PCI upgrade for coal injection?
It usually pays to show a PCI upgrade. For example, dense phase technology has been implemented in an existing PCI 4 blast line PCI plant at China Steel Corporation in Taiwan, which has significantly increased the rate of coal dust injection while reducing coke rate.
How is injected coal used in gasification process?
The targeted bringing together of the reactants high-percentage oxygen and injection coal in the right place is the core of this process. This achieves earlier ignition of the injected coal immediately upon exit from the lance and the overall gasification process starts.