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Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner

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Reducing PAH emissions from the iron ore sintering process by optimizing its operation parameters.

Yu-Cheng Chen¹, Perng-Jy Tsai, Jin-Luh Mou

¹Department of Environmental and Occupational Health, Medical College, National Cheng Kung University, 138, Sheng-Li Road, Tainan 70428, Taiwan.

Environmental Science & Technology

|July 17, 2009

Summary

Optimizing iron ore sintering parameters, including suction pressure and bed height, significantly reduced polycyclic aromatic hydrocarbon (PAH) emissions by 57.6%. The improved process maintained comparable sinter productivity and strength, confirming its industrial applicability.

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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

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Published on: May 19, 2019

Area of Science:

Environmental Science
Chemical Engineering
Materials Science

Background:

Polycyclic aromatic hydrocarbons (PAHs) are hazardous pollutants emitted during iron ore sintering.
Optimizing operational parameters is crucial for reducing PAH emissions in industrial processes.

Purpose of the Study:

To reduce polycyclic aromatic hydrocarbon (PAH) emissions from the iron ore sintering process.
To identify optimal operating parameters for minimizing PAH emission factors.

Main Methods:

Utilized Taguchi experimental design to optimize four parameters: water content, suction pressure, bed height, and hearth layer type.
Conducted experiments on a pilot-scale sinter pot simulating real-scale plant conditions.
Employed Analysis of Variance (ANOVA) to determine parameter significance.

Main Results:

Identified an optimal combination (6.5 wt% Wc, 600 mm Hb, 1400 mmH2O Ps, limonite HL) reducing total BaP equivalent concentration emission factor by 57.6%.
Suction pressure (70.9%) and bed height (21.2%) were the most influential parameters affecting PAH emissions.
Optimal conditions maintained comparable sinter productivity and strength to current operations.

Conclusions:

The optimized sintering operation significantly reduces PAH emissions.
The identified optimal parameters are applicable to real-scale iron ore sintering plants.
The study provides a viable strategy for cleaner iron ore production.