混合ガス(天然ガス+CO_2)による鉄鉱石の還元について : 天然ガスによる鉄鉱石の還元について III

概要

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In the previous reports (ib., Tetsu-to-Hagane Vol.41, 1955, p.5∿11 ; Vol.41, 1955, p.1149∿1155), the authors reported the experiment on the reduction process of iron ore by natural gas, and it was recognized that the reduction power of the gas was very strong when its decomposition was found. Then it was found that its decomposition was increased with increase of the reducing degree of iron ore too. Then, the authors examined the reformation of natural gas by CO_2 gas and the reduction of iron ore by its reformed gas. Results obtained were as follow ; (1) The reforming ratio was varied from 60 to 90% by the reducing degree of iron sand pellets which were fixed in the reforming furnace. (2) Using the unreduced iron sand pellets, the reforming ratio at 850℃ was greater than at 900, 950℃. (3) Using completly reduced pellets, the reforming ratio was 90% of more. (4) When the volume ratio (CH_4 : CO_2) of mixed gas was about 1 : 1, reforming ratio was greatest and the reduction of iron ore by reforming mixed gas was rapid, and the degree of reduction reached 90∿100%.
社団法人日本鉄鋼協会の論文
1961-11-01