Off-Gas Desulfurization With Sodium Bicarbonate for Iron Ore Sinter Plants: Investigation of the Influence of the Off-Gas Temperature

Lanzerstorfer, Christof

doi:10.20319/mijst.2017.32.1625

Cited by 1 publication

(3 citation statements)

References 6 publications

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“…The removal of SOx essentially depends upon the transformation of sodium bicarbonate to sodium carbonate at temperatures above 170 o C. However, in the above experimental work, the removal of SOx was satisfactory at temperatures in the range of 110 to 140 o C also. This was attributed to the high static pressure (-120 mBar) and velocity of the particles (Lanzerstorfer and Steiner 2016;Lanzerstorfer 2017). The summary of SOx, NOx reduction is given in Fig.…”

Section: The Technique Of Spraying In the Wind Boxesmentioning

confidence: 98%

“…The assessment of characteristics of the dust collected in the ESP is an important step in designing the ESP for maximizing collection e ciency (Lanzerstorfer and Steiner 2016;Lanzerstorfer 2017). The other critical properties of the dust are basicity (varies from 1.3 to 2.0), speci c resistivity (3 X 10 11 to 2 X 10 12 Ω cm), and bulk density (0.68 to 1.2 g/cm 3 ).…”

Section: Characterization Of Particulatesmentioning

confidence: 99%

“…Sodium bicarbonate (NaHCO 3 ) (Walawska et al 2013;Lanzerstorfer 2017), urea (CON 2 H 4 ) (Aries 2011;Chun et al 2017), and di-sodium borate deca-hydrate (Na 2 B 4 O 7 10(H 2 O) or Borax) were selected as they are known for high absorbance of SOx and NOx. In recent times, sodium bicarbonate is preferred to sodium carbonate or CaCO 3 as a means of treating sinter waste gas, especially for De-SOx.…”

Section: Dissolution Study To Capture Sox Nox and Chloridesmentioning

confidence: 99%

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Characterization and abatement of SOx, NOx and PCDD/Fs in iron ore sinter machine wind legs

Angalakuditi

Gujare

Anbarasu

et al. 2021

Preprint

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It was observed that SOx and NOx, in large concentrations, are getting released from certain wind boxes below the sinter machine. The particulates released from specific wind legs were characterized using Quantitative Evaluation of Materials by Scanning Electron Microscopy (QEMSCAN). Particulates with spherical, cubical, needle and bar-like morphologies containing K, Na, Cl were found. Nitrogen-based solids were found in clutter-like morphology. Some particles had a mixture of the above, SOx and NOx. A method of dissolving SOx, NOx and breaking them down into harmless substances was explored in this research. The deposits in the wind legs were dissolved in demineralized water and solutions of sodium bicarbonate, urea, and di-sodium borate deca-hydrate (borax) to estimate the absorbance of K, Na, Cl, Ca, Mg, S, and N based compounds present. Demineralized water and sodium bicarbonate were found to be the most effective sorbents of SOx and NOx. The filtrates were examined under QEMSCAN and found that SOx and NOx are not present. Based on the above finding, a solution of sodium bicarbonate and water 0.01% v/v was sprayed into a wind box and found that SOx and NOx have got reduced by about 55%. To maximize the capture of SOx and NOx, the solution was optimized at 0.02% v/v. With this novel technique, capital intensive Desulphurization (De-SOx) and Denitrification (De-NOx) installation can be avoided. Additionally, an economical solution to the Polychlorinated dibenzo para-dioxins and polychlorinated dibenzofurans (PCDD/Fs) emission was explored in this research. Various physicochemical mechanisms of forming harmful substances are described in this paper.

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Section: The Technique Of Spraying In the Wind Boxesmentioning

confidence: 98%

Section: Characterization Of Particulatesmentioning

confidence: 99%