Abstract
In the sintering, a preliminary prepared mixture of charge components and solid fuel is being burnt in air flow filtered layer (vacuum sintering). Let’s describe the phenomenon of sintering technology.
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Notes
- 1.
Gangue-part of the mineral composition of ore or concentrate that does not contain the main element (in the case of iron ore materials—iron).
- 2.
The reactivity of solid fuels is determined by a special test on the rate constant of interaction with CO2 at a temperature of 950–1100 °C [10].
- 3.
Heat transfer in the sintering layer can be viewed in various models: in a fixed bed, as a cross heat transfer, as a countercurrent heat transfer in the case when the origin of coordinates is placed on the maximum temperature horizon.
- 4.
Here and further “gas” is understood as a gas phase (it is both air and sintering gas).
- 5.
There are different concepts of “porosity”: fraction of the free space in a single particle or a single aggregate of micro particles (for example, a granule of a pelletized charge or pellet), and as a fraction of free space in a set of macro-particles (layer). Denoted by the same symbol ε.
- 6.
Index KS is an index reflecting the gas-dynamic resistance of the sinter, determined in a special experiment on its softening-reduction, integrated in the temperature range from 1000 to 1600 °C [62].
- 7.
In Russia, sinter plants work with a very high proportion in the mixture of finely ground concentrates (up to 100%), Fe content in fluxed sinters is 55–59%, SiO2—5.5–9%.
- 8.
From the general considerations of the sintering theory, we have a relation for the speeds of the belt movement v and the filtration rate ω: v = (L/h) · K · (Cg/Cp) · ω, where Cg, Cp is the heat capacities of the filtered gas and charge; K—coefficient.
- 9.
European enterprises [54] practice supplying reagents (activated carbons, coke, coal, specially prepared carbon materials to the gas pipeline of waste gas before the electrostatic precipitator with a flow rate that provides 80 mg/m3 of carbon in the gas flow and 200 mg/m3 inert additive (limestone).
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Bizhanov, A., Chizhikova, V. (2020). Sinter Production. In: Agglomeration in Metallurgy. Topics in Mining, Metallurgy and Materials Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-26025-5_1
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