About: http://webisa.webdatacommons.org/238189205

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Description of Related ArtIn a primary steelmaking operation, the steel is made in the presence of a primary steelmaking slag, mostly composed of oxides of metals, including calcium, silicon, iron, magnesium, aluminum and manganese.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com