Method for manufacturing carbon iron composite

Abstract

A method for manufacturing metallurgical formed carbon iron composite, in which the particle size of a raw material iron ore is optimized in the manufacture of carbon iron composite having a relatively small particle size so as to manufacture high-strength carbon iron composite while maintaining a target reduction ratio. The method for manufacturing carbon iron composite includes mixing coal and iron ore having a maximum particle size of 1 to 2 mm to produce a briquetted material, and carbonizing the briquetted material. Preferably, the iron content of the iron ore is 63% by mass or less, the blending ratio of the iron ore is 40% by mass or less relative to the total amount of coal and iron ore, and the iron ore is undersize of a 1- to 2-mm mesh screen.

1 . A method for manufacturing carbon iron composite, comprising:
 mixing coal and iron ore having a maximum particle size of 1 to 2 mm to produce a briquetted material; and   carbonizing the briquetted material.   
     
     
         2 . The method according to  claim 1 , wherein the iron ore has an iron content of 63% by mass or less. 
     
     
         3 . The method according to  claim 1 , wherein the iron ore has an iron content of 55% to 63% by mass. 
     
     
         4 . The method according to  claim 1 , wherein the iron ore has a blending ratio of 40% by mass or less relative to a total amount of the coal and the iron ore. 
     
     
         5 . The method according to  claim 4 , wherein the blending ratio of the iron ore is 1% to 40% by mass. 
     
     
         6 . The method according to  claim 5 , wherein the blending ratio of the iron ore is 10% to 40% by mass. 
     
     
         7 . The method according to  claim 1 , wherein the iron ore is an iron ore that passes through a 1- to 2-mm mesh screen. 
     
     
         8 . The method according to  claim 1 , wherein the coal has a particle size of 3 mm or less. 
     
     
         9 . The method according to  claim 1 , wherein producing the briquetted material comprises mixing coal, iron ore having a maximum particle size of 1 to 2 mm, and a binder to produce the briquetted material. 
     
     
         10 . The method according to  claim 9 , wherein the binder has an addition amount of 4% to 6% by mass relative to the total amount of the coal and the iron ore. 
     
     
         11 . The method according to  claim 1 , wherein the carbon iron composite has a size of 0.5 to 25 cc. 
     
     
         12 . The method according to  claim 1 , wherein the size of the carbon iron Composite is 5 to 8 cc.