Method for manufacturing reduced iron

Abstract

Provided is a process for manufacturing reduced iron by heating agglomerates, said process being capable of enhancing the yield of reduced iron and thus improving the productivity thereof. A process for manufacturing reduced iron which includes a step for agglomerating a mixture that comprises an iron oxide source, a carbonaceous reducing agent and a melting point regulator and a step for heating the obtained agglomerates to reduce the iron oxide contained in the agglomerates, wherein the agglomerates contain at least 1 mass % of a silicate mineral having a solidus temperature of 1300° C. or lower.

1 . A method for manufacturing a reduced iron, comprising the steps of:
 agglomerating a mixture including an iron oxide source, a carbonaceous reducing agent, and a melting point adjusting agent, and   heating a resulting agglomerate to reduce an iron oxide in the agglomerate,   wherein as the agglomerate, the one containing a silicate mineral with a solidus temperature of 1300° C. or less in an amount of 1 mass % or more is used.   
     
     
         2 . The manufacturing method according to  claim 1 , wherein the silicate mineral contains a volatile matter. 
     
     
         3 . The manufacturing method according to  claim 1 , wherein the silicate mineral is of an amphibole group. 
     
     
         4 . The manufacturing method according to  claim 3 , wherein the amphibole group is at least one or more selected from the group consisting of actinolite, cummingtonite, and grunerite. 
     
     
         5 . The manufacturing method according to  claim 1 , wherein as the iron oxide source, the one containing a silicate mineral with a solidus temperature of 1300° C. or less is used. 
     
     
         6 . The manufacturing method according to  claim 1 , wherein as the melting point adjusting agent, a silicate mineral with a solidus temperature of 1300° C. or less is used.