Ironton Sintering Plant Complex
 Ironton Sintering Plant Complex is a group of buildings north of Crosby Minnesota United States listed on the National Register of Historic Places. The plant was built in 1924 by the Hanna Mining Company to process iron ore mined in the Cuyuna Range. The mining industry after 1900 was seeking to exploit lower-grade iron deposits to meet the increasing demand of the iron and steel industry.