Danieli & C. Officine Meccaniche S.p.a.

Hyl Technologies S.a. De C.v.

Pablo Enrique Duarte Escareño

Alessandro Martinis

Michele Condosta

Eugenio Zendejas Martínez

The present invention concerns a method and an apparatus for producing DRI (Direct Reduced Iron) utilizing a high-oxidation reducing gas containing carbon monoxide and hydrogen, derived directly or indirectly from the gasification of hydrocarbons or coal, with a high content of oxidants (HO and CO). The invention provides a more efficient method and plant comprising a reactor in which particulate material of iron ore comes into contact with a high temperature reducing gas to produce DRI, with lower investment and operating costs, avoiding the need for a fired heater for the reducing gas fed into the reduction reactor. The reducing gas is heated to a temperature above 700&#xb0; C. in two steps, a first step at a temperature below about 400&#xb0; C. to prevent the phenomenon of metal dusting, by exchange of sensible heat supplied by the stream of hot spent gas removed from the reduction reactor; and a second step by means of partial or total combustion with oxygen, maintaining the temperature of the combustion gas below the limits established by the construction materials of the combustion chamber.

Growing community of inventors

Nuevo Leon, Mexico

Pablo Enrique Duarte Escareño