The foreign advanced steel producing countries have strict control on the sintering smoke VOCs, and the governance has made great progress, but there are few detailed reports on related technologies, management and emission data. At present, there is no report on VOCs emissions data for steel companies in mainland China.

The emissions of VOCs from Japan's Nippon Steel & Sumitomo Metal from 2009 to 2015 are shown in Figure 1. In 2015, the total amount of VOCs emitted by Nippon Steel & Sumitomo Metal was 619 tons, and the VOCs emissions per ton of steel were about 13.65 grams.

The emissions of VOCs from “China Steel” in Taiwan, China from 2012 to 2015 are shown in Figure 2. In 2015, the total amount of VOCs emitted by China Steel in China Steel was 720 tons, and the VOCs emissions per ton of steel were about 78.09 grams.

The emission of VOCs in the sintering process of some steel companies in Europe in 2004 can be seen. The emission gaps of different enterprises are very large. The methane emissions from tons of sinter are 35.5 grams to 412.5 grams, and the NMVOC emissions from tons of sintered ore are 1.5 grams to 260.9 grams. The emission of VOCs from the sintering gas of the Corus Steel Company of the Netherlands is 50 mg/m3 (standard state), and the emission of VOCs per ton of sinter is about 125.0 g.

It can be seen that the gap between the emissions of VOCs per ton of steel (or tons of sinter) in foreign steel companies is also large.