Method of producing iron ore pellets

Abstract

Provided is a method of producing iron ore pellets that can obtain high-strength iron ore pellets and contribute to carbon neutrality. The method of producing iron ore pellets includes: a mixing process of mixing iron ore having a total Fe content of 63 mass % or less, solid carbon, binder, and auxiliary material to obtain a mixture; a granulation process of granulating the mixture to obtain green pellets; and a firing process of firing the green pellets to obtain iron ore pellets by burning CH4 gas to heat the green pellets from outside while burning the solid carbon to heat the green pellets from inside. The solid carbon includes carbon produced from one or more gases selected from the group consisting of CO2 gas, CO gas, and CH4 gas.

1 . A method of producing iron ore pellets, the method comprising:
 a mixing process of mixing iron ore having a total Fe content of 63 mass % or less, solid carbon, binder, and auxiliary material to obtain a mixture;   a granulation process of granulating the mixture to obtain green pellets; and   a firing process of firing the green pellets to obtain iron ore pellets by burning CH 4  gas to heat the green pellets from outside while burning the solid carbon to heat the green pellets from inside, wherein   the solid carbon includes carbon produced from one or more gases selected from the group consisting of CO 2  gas, CO gas, and CH 4  gas.   
     
     
         2 . The method of producing iron ore pellets according to  claim 1 , wherein the solid carbon includes carbon produced from one or both of CO 2  gas and CO gas. 
     
     
         3 . The method of producing iron ore pellets according to  claim 1 , wherein the CH 4  gas used in the production of the carbon includes CH 4  gas produced from one or both of CO 2  gas and CO gas. 
     
     
         4 . The method of producing iron ore pellets according to  claim 1 , wherein the carbon includes carbon produced using iron as a catalyst. 
     
     
         5 . The method of producing iron ore pellets according to  claim 1 , wherein the fraction of the carbon in the solid carbon is 10 mass % or more. 
     
     
         6 . The method of producing iron ore pellets according to  claim 1 , wherein the CH 4  gas used in the firing process includes CH 4  gas produced from one or both of CO 2  and CO gas.