Reduction of Iron Ores by a Reformed Mixed Gas (Natural Gas+Carbon Dioxide)

Reduction of iron ores by a reformed natural gas-III

Abstract

In the previous reports (ib., Tetsu-to-Hagane Vol.41, 1955, p.5-11; Vol.41, 1955, p.1149-4155), the authors reported the experiment on the reduction process of iron are 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 are too.
Then, the authors examined the reformation of natural gas by CO₂ gas and the reduction of iron are 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°C was greater than at 900, 950°C.
(3) Using completly reduced pellets, the reforming ratio was 90% of more.
(4) When the volume ratio (CH₄: CO₂) of mixed gas was about 1: 1, reforming ratio was greatest and the reduction of iron are by reforming mixed gas was rapid, and the degree of reduction reached 90-100%.