Research progress on VOCs emission reduction in sintering process of iron and steel industry

 Volatile organic compounds (VOCs) generally refer to organic acids with high vapor pressure and volatilization at normal temperature and pressure, including aliphatic and aromatic various alkanes, alkenes, and oxygenated hydrocarbons. And halogenated hydrocarbons, such as benzene, toluene, dichloromethane, formaldehyde and ethyl acetate.

There are many types of VOCs, but it is impossible to include all volatile organic compounds during monitoring and supervision. Therefore, some indicators are sometimes used to characterize VOCs such as TVOC, NMVOC and hydrocarbons. VOCs generally have strong irritancy and toxicity, some have teratogenic, carcinogenic and mutagenic effects, and quite a few are flammable and explosive. Some VOCs are factors that cause photochemical smog; halogenated hydrocarbon VOCs can destroy the ozone layer. It causes a greenhouse effect; VOCs are also an important precursor of ozone and PM2.5, and ash weather is closely related to the environmental concentration of ozone and PM2.5. Therefore, studying the production of VOCs and reducing the emission of VOCs is of great significance to human and biological health, ecological environment, and ozone reduction, PM2.5 and smog.

At present, the industry generally believes that the coking process in the steel production process produces VOCs; the sintering process is also one of the sources of VOCs due to the use of fuel. This paper investigates the current status, standards and technologies of VOCs emission in the sintering process of steel industry at home and abroad, and provides references for reducing VOCs emissions in the steel industry sintering process.

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