Therefore, it can be concluded that for coal injection into blast furnace, using La2O3 as an improver can shorten the burning time of pulverized coal, reduce unburned coal, and also further improve coal-to-coke replacement.
A new piloted burner is introduced for this purpose featuring air-blast atomization, with liquid injection from a needle that can be translated within a co-flowing air stream.
The air was blasted in from the injection inlet by means of a blower, and the product gas was released from the outlet.
The conditions under which top gas recycling is economically feasible are also reported, as well as the effect of omitting oil injection in a blast furnace with top gas recycling.
The crux of PCI technology is a partial replacement of coke and natural gas by steam coal through its direct injection into the blast furnace.
Herein we describe the application of historical data design under response surface methodology to formulate the correlation of the fuel spray SMD (Sauter Mean Diameter) with factors (viscosity, fuel injection pressure, air-blast pressure).
Two methods of coal flow measurement are described in this article for a pulverized coal injection (PCI) process into blast furnaces.
This paper investigates the injection of SNG into charcoal blast furnaces as a substitute for granular charcoal charged from the top and pulverized charcoal injections with potential increase of productivity and decrease of specific CO2 emissions.
Increasing the injection of coal powder into blast furnace will reduce the combustion rate of pulverized coal in the raceway, increase unburned coal, and decrease the layer permeability of the blast furnace, all of which seriously impede the efficient operation of the blast furnace.
Alternatively, the direct utilisation of high-quality thermal coal for blast-furnace production otherwise called "pulverised coal injection" technology (PCI) (Ishii 2000; Kalkreutz et al. 2005; Osorio et al. 2006; Pohlmann et al. 2010; Zhao et al. 2015).
Other technologies, like using pulverised coal injection, top pressure recovery turbines and blast furnace control systems, can reduce direct energy use by 10% and electricity by 35%.
