Process for producing sponge iron by direct reduction of...

C - Chemistry – Metallurgy – 21 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C21B 13/14 (2006.01) C21B 13/00 (2006.01)

Patent

CA 2242255

In a process for producing sponge iron by direct reduction of iron-oxide- containing material, synthesis gas is mixed with top gas forming in the direct reduction of the iron-oxide- containing material and is utilized as a CO- and H2-containing reducing gas for direct reduction and for heating the iron-oxide-containing material to a reduction temperature. To be able to save energy in an economically efficient manner when producing steel, especially in the refining process, direct reduction is carried out as follows: .cndot. in addition to the reducing gas, a carbon-containing gas, such as natural gas, or a gas having higher hydrocarbons is utilized for reduction .cndot. the iron-oxide-containing material for a predetermined period of time exceeding the period necessary for complete reduction is exposed to the reducing gas and to the additionally supplied carbon-containing gas, and .cndot. a CO/CO, ratio ranging between 2 and 5, preferably a ratio in excess of 2.5, is adjusted in the reducing gas.

Selon ce procédé de production d'éponge de fer par réduction directe de matériaux contenant des oxydes de fer, on mélange du gaz de synthèse au gaz du haut de colonne produit pendant la réduction directe des matériaux contenant des oxydes de fer et on l'utilise comme gaz de réduction contenant du CO et du H2 pour réduire directement et pour chauffer les matériaux contenant des oxydes de fer jusqu'à la température de réduction. Afin de pouvoir économiser de l'énergie pendant la production d'acier, notamment pendant l'affinage, on procède comme suit pendant la réduction directe: outre le gaz de réduction, on utilise un gaz contenant du carbone, tel que le gaz naturel, ou un gaz contenant des hydrocarbures supérieurs; on expose les matériaux contenant des oxydes de fer au gaz de réduction et au gaz additionnel contenant du carbone pendant une durée déterminée supérieure à celle qui serait nécessaire pour achever la réduction; on règle un rapport de CO/CO2 compris entre 2 et 5 dans le gaz de réduction, de préférence un rapport supérieur à 2,5.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Process for producing sponge iron by direct reduction of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing sponge iron by direct reduction of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing sponge iron by direct reduction of... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-1697669

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.