1. Blast furnace oxygen-rich coal injection. There are two conventional ways for iron & steel smelting. The first is to use the iron ore in blast furnace to smelt the iron of the compound in nature into zero-valent iron, which is the pig iron we often say. The pig iron is then refined through a converter to become a variety of alloy steels or stainless steels that we often see in our daily lives. At the stage of smelting pig iron through blast furnace, we generally adopt pressure swing adsorption technology to provide enriched oxygen by adding oxygen to the blast furnace to optimize the smelting conditions and reduce the cost. Finally we obtain the high-quality pig iron.

2. Electric furnace smelting is the second way. The scrap iron we used in our lives is sorted out and fed into the electric furnace after being reclaimed by the recycling station. In the electric furnace, we use high-purity enriched oxygen for high-temperature smelting to get finished steel.

3. In addition,  pressure swing adsorption technology is also applied in the tail gas treatment of smelting furnaces such as blast furnaces and converters mentioned above, which is mainly to adsorb the useful CO by pressure swing adsorption technology, and then purify and refine it for the synthesis reaction in chemical and other fields.