Sulfur dioxide standard for zinc smelting

The standard of sulfur dioxide in zinc smelting industry in China is 300mg/Nm3.

In China, there are different national and local regulations on sulfur dioxide emission standards in zinc smelting industry. Among them, the National Pollutant Emission Standard for Industrial Enterprises (GB31571-2015) issued in 20 16 stipulates that the concentration limit of sulfur dioxide emission in zinc smelting industry is 300mg/Nm3. This standard is applicable to enterprises engaged in zinc smelting. The emission of harmful gases such as sulfur dioxide must conform to this standard within the boundaries of domestic and provincial urban living areas and county-level urban main cities.

Zinc smelting industry is a harmful pollution industry, and the emission of harmful gases such as sulfur dioxide will affect the environment and people's health. In order to protect the environment and public health, local governments and environmental protection departments will also introduce stricter local standards and restrictions on the basis of national standards.