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Abstract A source of volatile organic compounds (VOCs) is iron ore sintering process. At present,the status of the VOCs emissions in Chinese steel industry is no standard,unmonitored and undetected. The amount of VOCs emissions is not clear. The VOCs emissions status and standards of steel industry in China and abroad were summarized. The VOCs formation in iron ore sintering process was analyzed. They were formed from volatile material in the coke breeze,oily mill scale,etc. and discharged as the form of gas. There are three ways to reduce VOCs emissions: source reduction,process control and treatment in the end. Source reduction is to reduce the oil content in the dust and mill scale. It is the best choice for the VOCs inhibition. Process control is that the parts of the sintering waste gas are introduced into the sintering layer. The VOCs in the hot waste gas are decomposed through the sintering zone with more than 1 300 ℃. Treatment in the end is active carbon method and MEROS method. These technologies have been used in some Chinese steel plants. With the VOCs standard to be formulated,the VOCs emissions of iron ore sintering in Chinese steel industry is expected to meet the standard with the existing technologies.
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Received: 01 June 2017
Published: 05 February 2018
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